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Document and Entity Information - shares	6 Months Ended
Document and Entity Information - shares	Jun. 30, 2017	Jul. 25, 2017
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2017
Document Fiscal Year Focus	2017
Document Fiscal Period Focus	Q2
Trading Symbol	AME
Entity Registrant Name	AMETEK INC/
Entity Central Index Key	0001037868
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		230,795,385

Consolidated Statement of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Income Statement [Abstract]
Net sales	$ 1,064,604	$ 977,706	$ 2,072,286	$ 1,922,104
Operating expenses:
Cost of sales	699,739	639,711	1,364,674	1,263,392
Selling, general and administrative	132,480	118,959	254,929	231,153
Total operating expenses	832,219	758,670	1,619,603	1,494,545
Operating income	232,385	219,036	452,683	427,559
Other expenses:
Interest expense	(24,552)	(23,706)	(49,068)	(47,107)
Other, net	(4,478)	(4,769)	(8,838)	(6,849)
Income before income taxes	203,355	190,561	394,777	373,603
Provision for income taxes	52,874	52,368	105,370	101,240
Net income	$ 150,481	$ 138,193	$ 289,407	$ 272,363
Basic earnings per share	$ 0.65	$ 0.59	$ 1.26	$ 1.16
Diluted earnings per share	$ 0.65	$ 0.59	$ 1.25	$ 1.16
Weighted average common shares outstanding:
Basic shares	230,158	233,285	229,853	234,134
Diluted shares	231,588	234,790	231,296	235,503
Dividends declared and paid per share	$ 0.09	$ 0.09	$ 0.18	$ 0.18

Consolidated Statement of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Statement of Comprehensive Income [Abstract]
Total comprehensive income	$ 188,319	$ 85,409	$ 337,498	$ 254,685

Consolidated Balance Sheet - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 516,483	$ 717,259
Receivables, net	642,263	592,326
Inventories, net	541,213	492,104
Deferred income taxes		50,004
Other current assets	89,314	76,497
Total current assets	1,789,273	1,928,190
Property, plant and equipment, net	492,507	473,230
Goodwill	3,117,129	2,818,950
Other intangibles, net	1,981,062	1,734,021
Investments and other assets	155,042	146,283
Total assets	7,535,013	7,100,674
Current liabilities:
Short-term borrowings and current portion of long-term debt, net	272,550	278,921
Accounts payable	405,937	369,537
Income taxes payable	41,361	29,913
Accrued liabilities	275,298	246,070
Total current liabilities	995,146	924,441
Long-term debt, net	2,128,838	2,062,644
Deferred income taxes	596,735	621,776
Other long-term liabilities	222,098	235,300
Total liabilities	3,942,817	3,844,161
Stockholders' equity:
Common stock	2,626	2,615
Capital in excess of par value	637,487	604,143
Retained earnings	4,651,790	4,403,683
Accumulated other comprehensive loss	(494,298)	(542,389)
Treasury stock	(1,205,409)	(1,211,539)
Total stockholders' equity	3,592,196	3,256,513
Total liabilities and stockholders' equity	$ 7,535,013	$ 7,100,674

Condensed Consolidated Statement of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Operating activities:
Net income	$ 289,407	$ 272,363
Adjustments to reconcile net income to total operating activities:
Depreciation and amortization	86,384	80,937
Deferred income taxes	(634)	4,382
Share-based compensation expense	14,113	11,035
Net change in assets and liabilities, net of acquisitions	3,404	(26,331)
Pension contribution	(51,716)	(1,777)
Other, net	450	(50)
Total operating activities	341,408	340,559
Investing activities:
Additions to property, plant and equipment	(27,664)	(25,251)
Purchases of businesses, net of cash acquired	(518,634)	(293,468)
Other, net	(399)	500
Total investing activities	(546,697)	(318,219)
Financing activities:
Net change in short-term borrowings	(6,816)	221,901
Repurchases of common stock	(5,474)	(135,295)
Cash dividends paid	(41,300)	(41,956)
Excess tax benefits from share-based payments		4,196
Proceeds from employee stock plans and other, net	30,396	7,661
Total financing activities	(23,194)	56,507
Effect of exchange rate changes on cash and cash equivalents	27,707	(3,657)
(Decrease) increase in cash and cash equivalents	(200,776)	75,190
Cash and cash equivalents:
Beginning of period	717,259	381,005
End of period	$ 516,483	$ 456,195

Basis of Presentation

6 Months Ended

Jun. 30, 2017

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Basis of Presentation

1.	Basis of Presentation

The accompanying consolidated financial statements are unaudited. AMETEK, Inc. (the “Company”) believes that all adjustments (which primarily consist of normal recurring accruals) necessary for a fair presentation of the consolidated financial position of the Company at June 30, 2017, the consolidated results of its operations for the three and six months ended June 30, 2017 and 2016 and its cash flows for the six months ended June 30, 2017 and 2016 have been included. Quarterly results of operations are not necessarily indicative of results for the full year. The accompanying consolidated financial statements should be read in conjunction with the audited consolidated financial statements and related notes presented in the Company’s Annual Report on Form 10-K for the year ended December 31, 2016 as filed with the Securities and Exchange Commission.

Recent Accounting Pronouncements

6 Months Ended

Jun. 30, 2017

Accounting Changes and Error Corrections [Abstract]

Recent Accounting Pronouncements

2.	Recent Accounting Pronouncements

In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2014-09, Revenue from Contracts with Customers (“ASU 2014-09”) and modified the standard thereafter. The objective of ASU 2014-09 is to establish a single comprehensive model for entities to use in accounting for revenue arising from contracts with customers and will supersede most of the existing revenue recognition guidance. The core principle of ASU 2014-09 is that an entity recognizes revenue at the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. ASU 2014-09 applies to all contracts with customers except those that are within the scope of other topics in the FASB Accounting Standards Codification.

ASU 2014-09 is effective for interim and annual reporting periods beginning after December 15, 2017 and may be early adopted for interim and annual reporting periods beginning after December 15, 2016. The Company will adopt ASU 2014-09 as of January 1, 2018. The guidance permits adoption by retrospectively applying the guidance to each prior reporting period presented (full retrospective method) or prospectively applying the guidance and providing additional disclosures comparing results to previous guidance, with the cumulative effect of initially applying the guidance recognized in beginning retained earnings at the date of initial application (modified retrospective method). The Company expects to use the modified retrospective method of adoption.

ASU 2014-09 is primarily expected to impact the Company’s revenue recognition procedures by requiring recognition of certain revenues to move from upon shipment or delivery to over-time. The recording of certain revenues over-time is not expected to have a material impact on the Company’s consolidated results of operations or financial position. Also, the Company is developing the additional expanded disclosures required. The Company is in the process of identifying and implementing the appropriate changes to business processes and controls to support recognition and disclosure under ASU 2014-09. While the Company continues to finalize the overall potential impact of the new guidance, it does not currently expect the adoption of ASU 2014-09 to have a material impact on its consolidated results of operations, financial position and cash flows.

In July 2015, the FASB issued ASU No. 2015-11, Simplifying the Measurement of Inventory (“ASU 2015-11”), which applies to inventory that is measured using first-in, first-out (“FIFO”) or average cost. As prescribed in this update, an entity should measure inventory that is within scope at the lower of cost and net realizable value, which is the estimated selling prices in the ordinary course of business, less reasonably predictable costs of completion, disposal and transportation. Subsequent measurement is unchanged for inventory that is measured using last-in, first-out (“LIFO”). The Company prospectively adopted ASU 2015-11 effective January 1, 2017 and the adoption did not have a significant impact on the Company’s consolidated results of operations, financial position or cash flows.

In November 2015, the FASB issued ASU No. 2015-17, Balance Sheet Classification of Deferred Taxes (“ASU 2015-17”). ASU 2015-17 simplifies the presentation of deferred taxes by requiring deferred tax assets and liabilities be classified as noncurrent on the consolidated balance sheet. The Company prospectively adopted ASU 2015-17 effective January 1, 2017 and the adoption did not have a significant impact on the Company’s consolidated results of operations, financial position or cash flows. The December 31, 2016 consolidated balance sheet was not adjusted for the adoption of ASU 2015-17.

In February 2016, the FASB issued ASU No. 2016-02, Leases (“ASU 2016-02”). The new standard establishes a right-of-use model that requires a lessee to record a right-of-use asset and a lease liability on the balance sheet for all leases with terms longer than twelve months. Leases will be classified as either finance or operating, with classification affecting the pattern of expense recognition in the income statement. ASU 2016-02 is effective for interim and annual reporting periods beginning after December 15, 2018. ASU 2016-02 is to be adopted using a modified retrospective approach and early adoption is permitted. The Company has not determined the impact ASU 2016-02 may have on the Company’s consolidated results of operations, financial position, cash flows and financial statement disclosures.

In March 2016, the FASB issued ASU No. 2016-09, Improvements to Employee Share-Based Payment Accounting (“ASU 2016-09”). ASU 2016-09 includes changes to the accounting for share-based payment transactions, including the income tax consequences, classification of awards as either equity or liabilities and classification on the statement of cash flows. The Company prospectively adopted ASU 2016-09 effective January 1, 2017. For the three and six months ended June 30, 2017, the Company recorded a tax benefit of $3.1 million and $8.9 million, respectively, within Provision for income taxes related to the tax effects of share-based payment transactions. Prior to adoption, this amount would have been recorded as a component of Capital in excess of par value. The adoption of this standard could create volatility in the Company’s effective tax rate going forward. The Company elected not to change its accounting policy with respect to the estimation of forfeitures. The Company no longer reclassifies the excess tax benefits from share-based payments from operating activities to financing activities in the consolidated statement of cash flows. For the three and six months ended June 30, 2017, the Company excluded the excess tax benefits from the assumed proceeds available to repurchase shares in the computation of its diluted earnings per share and the related increase in the Company’s diluted weighted average common shares outstanding was not significant.

In January 2017, the FASB issued ASU No. 2017-01, Clarifying the Definition of a Business (“ASU 2017-01”). ASU 2017-01 provides a more robust framework to use in determining when a set of assets and activities is a business. ASU 2017-01 requires an entity to evaluate if substantially all of the fair value of the gross assets acquired is concentrated in a single identifiable asset or a group of similar identifiable assets; if so, the set of assets is not a business. ASU 2017-01 requires that, to be a business, the set must include, at a minimum, an input and a substantive process that together significantly contribute to the ability to create outputs. ASU 2017-01 is effective for interim and annual reporting periods beginning after December 15, 2017. ASU 2017-01 will be applied prospectively to any transactions occurring within the period of adoption. Early adoption is permitted, including for interim or annual periods in which the financial statements have not been issued or made available for issuance. The Company does not expect the adoption of ASU 2017-01 to have a significant impact on the Company’s consolidated results of operations, financial position, cash flows and financial statement disclosures.

In January 2017, the FASB issued ASU No. 2017-04, Simplifying the Test for Goodwill Impairment (“ASU 2017-04”). ASU 2017-04 eliminates the requirement to calculate the implied fair value of goodwill (second step) to measure a goodwill impairment charge. Under the guidance, an impairment charge will be measured based on the excess of the reporting unit’s carrying amount over its fair value (first step). ASU 2017-04 is effective for interim and annual reporting periods beginning after December 15, 2019 and early adoption is permitted. The Company early adopted ASU 2017-04 effective January 1, 2017 and the adoption did not have a significant impact on the Company’s consolidated results of operations, financial position, cash flows and financial statement disclosures.

In March 2017, the FASB issued ASU No. 2017-07, Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost (“ASU 2017-07”), which changes how employers that sponsor defined benefit pension and/or other postretirement benefit plans present the net periodic benefit cost in the income statement. ASU 2017-07 requires employers to present the service cost component of net periodic benefit cost in the same income statement line item as other employee compensation costs. All other components of the net periodic benefit cost will be presented outside of operating income. ASU 2017-07 is effective for interim and annual reporting periods beginning after December 15, 2017 and early adoption is permitted. The Company has not determined the impact ASU 2017-07 may have on the Company’s consolidated results of operations, financial position or cash flows.

In May 2017, the FASB issued ASU No. 2017-09, Scope of Modification Accounting (“ASU 2017-09”). ASU 2017-09 clarifies which changes to the terms or conditions of a share-based payment award require an entity to apply modification accounting. ASU 2017-09 is effective for interim and annual reporting periods beginning after December 15, 2017 and early adoption is permitted. The Company does not expect the adoption of ASU 2017-09 to have a significant impact on the Company’s consolidated results of operations, financial position or cash flows.

Earnings Per Share

6 Months Ended

Jun. 30, 2017

Earnings Per Share [Abstract]

Earnings Per Share

3.	Earnings Per Share

The calculation of basic earnings per share is based on the weighted average number of common shares considered outstanding during the periods. The calculation of diluted earnings per share reflects the effect of all potentially dilutive securities (principally outstanding stock options and restricted stock grants). The number of weighted average shares used in the calculation of basic earnings per share and diluted earnings per share was as follows:

Three Months Ended

Six Months Ended

June 30,

2017

2016

2017

2016

(In thousands)

Weighted average shares:

Basic shares

230,158

233,285

229,853

234,134

Equity-based compensation plans

1,430

1,505

1,443

1,369

Diluted shares

231,588

234,790

231,296

235,503

Accumulated Other Comprehensive Income (Loss)

6 Months Ended

Jun. 30, 2017

Equity [Abstract]

Accumulated Other Comprehensive Income (Loss)

4.	Accumulated Other Comprehensive Income (Loss)

The components of accumulated other comprehensive income (loss) consisted of the following:


	Three Months Ended									Three Months Ended
	June 30, 2017									June 30, 2016
	Foreign Currency Items and Other			Defined Benefit Pension Plans			Total			Foreign Currency Items and Other			Defined Benefit Pension Plans			Total
	(In thousands)
Balance at the beginning of the period	$	(330,569	)	$	(201,567	)	$	(532,136	)	$	(217,102	)	$	(153,423	)	$	(370,525	)

Other comprehensive income (loss) before reclassifications:
Translation adjustments		59,525			—			59,525			(37,819	)		—			(37,819	)
Change in long-term intercompany notes		15,988			—			15,988			(9,904	)		—			(9,904	)
Net investment hedges		(63,933	)		—			(63,933	)		(10,271	)		—			(10,271	)
Gross amounts reclassified from accumulated other comprehensive income (loss)		—			3,512			3,512			—			2,484			2,484
Income tax benefit (expense)		24,067			(1,321	)		22,746			3,595			(869	)		2,726

Other comprehensive (loss) income, net of tax		35,647			2,191			37,838			(54,399	)		1,615			(52,784	)

Balance at the end of the period	$	(294,922	)	$	(199,376	)	$	(494,298	)	$	(271,501	)	$	(151,808	)	$	(423,309	)


	Six Months Ended									Six Months Ended
	June 30, 2017									June 30, 2016
	Foreign Currency Items and Other			Defined Benefit Pension Plans			Total			Foreign Currency Items and Other			Defined Benefit Pension Plans			Total
	(In thousands)
Balance at the beginning of the period	$	(338,631	)	$	(203,758	)	$	(542,389	)	$	(250,593	)	$	(155,038	)	$	(405,631	)

Other comprehensive income (loss) before reclassifications:
Translation adjustments		64,204			—			64,204			(16,140	)		—			(16,140	)
Change in long-term intercompany notes		18,692			—			18,692			3,799			—			3,799
Net investment hedges		(62,889	)		—			(62,889	)		(13,181	)		—			(13,181	)
Gross amounts reclassified from accumulated other comprehensive income (loss)		—			7,024			7,024			—			4,968			4,968
Income tax benefit (expense)		23,702			(2,642	)		21,060			4,614			(1,738	)		2,876

Other comprehensive (loss) income, net of tax		43,709			4,382			48,091			(20,908	)		3,230			(17,678	)

Balance at the end of the period	$	(294,922	)	$	(199,376	)	$	(494,298	)	$	(271,501	)	$	(151,808	)	$	(423,309	)

Reclassifications for the amortization of defined benefit pension plans are included in Cost of sales in the consolidated statement of income. See Note 12 for further details.

Fair Value Measurements

6 Months Ended

Jun. 30, 2017

Fair Value Disclosures [Abstract]

Fair Value Measurements

5.	Fair Value Measurements

Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date.

The Company utilizes a valuation hierarchy for disclosure of the inputs to the valuations used to measure fair value. This hierarchy prioritizes the inputs into three broad levels as follows. Level 1 inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities. Level 2 inputs are quoted prices for similar assets and liabilities in active markets or inputs that are observable for the asset or liability, either directly or indirectly through market corroboration, for substantially the full term of the financial instrument. Level 3 inputs are unobservable inputs based on the Company’s own assumptions used to measure assets and liabilities at fair value. A financial asset or liability’s classification within the hierarchy is determined based on the lowest level input that is significant to the fair value measurement.

The following table provides the Company’s assets that are measured at fair value on a recurring basis as of June 30, 2017 and December 31, 2016, consistent with the fair value hierarchy:


	June 30, 2017		December 31, 2016
	Fair Value		Fair Value
	(In thousands)
Fixed-income investments	$	7,749	$	7,317

The fair value of fixed-income investments, which are valued as level 1 investments, was based on quoted market prices. The fixed-income investments are shown as a component of long-term assets on the consolidated balance sheet.

For the six months ended June 30, 2017 and 2016, gains and losses on the investments noted above were not significant. No transfers between level 1 and level 2 investments occurred during the six months ended June 30, 2017 and 2016.

Financial Instruments

Cash, cash equivalents and fixed-income investments are recorded at fair value at June 30, 2017 and December 31, 2016 in the accompanying consolidated balance sheet.

The following table provides the estimated fair values of the Company’s financial instrument liabilities, for which fair value is measured for disclosure purposes only, compared to the recorded amounts at June 30, 2017 and December 31, 2016:


	June 30, 2017						December 31, 2016
	Recorded Amount			Fair Value			Recorded Amount			Fair Value
	(In thousands)
Short-term borrowings, net	$	—		$	—		$	—		$	—
Long-term debt, net (including current portion)		(2,401,388	)		(2,435,560	)		(2,341,565	)		(2,386,901	)

The fair value of short-term borrowings, net approximates the carrying value. Short-term borrowings, net are valued as level 2 liabilities as they are corroborated by observable market data. The Company’s long-term debt, net is all privately held with no public market for this debt, therefore, the fair value of long-term debt, net was computed based on comparable current market data for similar debt instruments and is considered to be a level 3 liability.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

Hedging Activities

6 Months Ended

Jun. 30, 2017

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Hedging Activities

6.	Hedging Activities

The Company has designated certain foreign-currency-denominated long-term borrowings as hedges of the net investment in certain foreign operations. As of June 30, 2017, these net investment hedges included British-pound-and Euro-denominated long-term debt. These borrowings were designed to create net investment hedges in each of the designated foreign subsidiaries. The Company designated the British-pound- and Euro-denominated loans referred to above as hedging instruments to offset translation gains or losses on the net investment due to changes in the British pound and Euro exchange rates. These net investment hedges are evidenced by management’s contemporaneous documentation supporting the hedge designation. Any gain or loss on the hedging instruments (the debt) following hedge designation is reported in accumulated other comprehensive income in the same manner as the translation adjustment on the investment based on changes in the spot rate, which is used to measure hedge effectiveness.

At June 30, 2017, the Company had $396.3 million of British-pound-denominated loans, which were designated as a hedge against the net investment in British pound functional currency foreign subsidiaries. At June 30, 2017, the Company had $570.6 million in Euro-denominated loans, which were designated as a hedge against the net investment in Euro functional currency foreign subsidiaries. As a result of the British-pound-and Euro-denominated loans being designated and 100% effective as net investment hedges, $62.9 million of currency remeasurement losses have been included in the foreign currency translation component of other comprehensive income for the six months ended June 30, 2017.

Inventories, Net

6 Months Ended

Jun. 30, 2017

Inventory Disclosure [Abstract]

Inventories, Net

7.	Inventories, net


	June 30,		December 31,
	2017		2016
	(In thousands)
Finished goods and parts	$	83,126	$	75,827
Work in process		114,777		101,484
Raw materials and purchased parts		343,310		314,793

Total inventories, net	$	541,213	$	492,104

Acquisitions

6 Months Ended

Jun. 30, 2017

Business Combinations [Abstract]

Acquisitions

8.	Acquisitions

The Company spent $518.6 million in cash, net of cash acquired, to acquire Rauland-Borg Corporation (“Rauland”) in February 2017 and MOCON, Inc. in June 2017. The Rauland acquisition includes a potential $30 million contingent payment due upon the achievement of certain milestones as described further below. Rauland is a global provider of enterprise clinical and education communications solutions for hospitals, healthcare systems and educational facilities. MOCON is a provider of laboratory and field gas analysis instrumentation to research laboratories, production facilities and quality control departments in food and beverage, pharmaceutical and industrial applications. Rauland and MOCON are part of AMETEK’s Electronic Instruments Group.

The following table represents the preliminary allocation of the aggregate purchase price for the net assets of the 2017 acquisitions based on their estimated fair values at acquisition (in millions):


Property, plant and equipment	$	21.5
Goodwill		256.0
Other intangible assets		269.5
Long-term liabilities		(10.6	)
Deferred income taxes		(27.2	)
Net working capital and other⁽¹⁾		34.9

Total purchase price		544.1
Less: Contingent payment liability		(25.5	)

Total cash paid	$	518.6

(1)	Includes $30.7 million in accounts receivable, whose fair value, contractual cash flows and expected cash flows are approximately equal.

The amount allocated to goodwill is reflective of the benefits the Company expects to realize from the 2017 acquisitions as follows: Rauland provides the Company with an attractive new growth segment within the medical technology market, strong growth opportunities in its core markets and incremental growth opportunities through acquisitions and international expansion. MOCON’s products and technologies complement the Company’s existing gas analysis instrumentation business and provides it with opportunities to expand into the growing food and pharmaceutical package testing market. The Company expects approximately $146.4 million of the goodwill recorded in connection with the 2017 acquisitions will be tax deductible in future years.

At June 30, 2017, purchase price allocated to other intangible assets of $269.5 million consists of $53.6 million of indefinite-lived intangible trade names, which are not subject to amortization. The remaining $215.9 million of other intangible assets consists of $162.0 million of customer relationships, which are being amortized over a period of 18 years and $53.9 million of purchased technology, which is being amortized over a period of 18 years. Amortization expense for each of the next five years for the 2017 acquisitions is expected to approximate $12 million per year.

The Company is in the process of finalizing the measurement of certain tangible and intangible assets and liabilities for its 2017 acquisitions, including inventory, property, plant and equipment, goodwill, customer relationships, trade names, purchased technology, and the accounting for income taxes and certain long-term liabilities.

The above mentioned contingent payment is based on Rauland achieving a certain cumulative revenue target over the period October 1, 2016 to September 30, 2018. If Rauland achieves the target, the $30 million contingent payment will be made; however, if the target is not achieved, no payment will be made. At the acquisition date, the estimated fair value of the contingent payment liability was $25.5 million, which was based on a probabilistic approach using level 3 inputs. At June 30, 2017, there was no change to the estimated fair value of the contingent payment liability.

The 2017 acquisitions had an immaterial impact on reported net sales, net income and diluted earnings per share for the three and six months ended June 30, 2017. Had the 2017 acquisitions been made at the beginning of 2017 or 2016, unaudited pro forma net sales, net income and diluted earnings per share for the three and six months ended June 30, 2017 and 2016, respectively, would not have been materially different than the amounts reported.

Goodwill

6 Months Ended

Jun. 30, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill

9.	Goodwill

The changes in the carrying amounts of goodwill by segment were as follows:

Electronic
Instruments
Group

Electro-
mechanical
Group

Total

(In millions)

Balance at December 31, 2016

1,817.0

1,002.0

2,819.0

Goodwill acquired

256.0

—

256.0

Purchase price allocation adjustments and other

—

0.6

Foreign currency translation adjustments

21.0

20.5

41.5

Balance at June 30, 2017

2,094.0

1,023.1

3,117.1

Income Taxes

6 Months Ended

Jun. 30, 2017

Income Tax Disclosure [Abstract]

Income Taxes

10.

Income Taxes

At June 30, 2017, the Company had gross unrecognized tax benefits of $61.7 million, of which $52.1 million, if recognized, would impact the effective tax rate.

The following is a reconciliation of the liability for uncertain tax positions (in millions):


Balance at December 31, 2016	$	57.9
Additions for tax positions		4.0
Reductions for tax positions		(0.2	)

Balance at June 30, 2017	$	61.7

The Company recognizes interest and penalties accrued related to uncertain tax positions in income tax expense. The amounts recognized in income tax expense for interest and penalties during the three and six months ended June 30, 2017 and 2016 were not significant.

Share-Based Compensation

6 Months Ended

Jun. 30, 2017

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Share-Based Compensation

11.

Share-Based Compensation

Total share-based compensation expense was as follows:


	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2017		2016		2017		2016
	(In thousands)
Stock option expense	$	2,754	$	3,224	$	4,967	$	5,323
Restricted stock expense		6,031		2,732		9,146		5,712

Total pre-tax expense	$	8,785	$	5,956	$	14,113	$	11,035

Pre-tax share-based compensation expense is included in the consolidated statement of income in either Cost of sales or Selling, general and administrative expenses, depending on where the recipient’s cash compensation is reported. In the second quarter of 2017, the Company recorded a $2.5 million pre-tax charge in corporate administrative expenses related to the accelerated vesting of restricted stock grants in association with the retirement of the Company’s Executive Chairman of the Board of Directors.

The fair value of each stock option grant is estimated on the date of grant using a Black-Scholes-Merton option pricing model. The following weighted average assumptions were used in the Black-Scholes-Merton model to estimate the fair values of stock options granted during the periods indicated:


	Six Months Ended			Year Ended
	June 30, 2017			December 31, 2016
Expected volatility		18.0	%		21.8	%
Expected term (years)		5.0			5.0
Risk-free interest rate		1.94	%		1.23	%
Expected dividend yield		0.60	%		0.77	%
Black-Scholes-Merton fair value per stock option granted	$	11.05		$	9.14

Expected volatility is based on the historical volatility of the Company’s stock. The Company used historical exercise data to estimate the stock options’ expected term, which represents the period of time that the stock options granted are expected to be outstanding. Management anticipates that the future stock option holding periods will be similar to the historical stock option holding periods. The risk-free interest rate for periods within the expected term of the stock option is based on the U.S. Treasury yield curve at the time of grant. Compensation expense recognized for all share-based awards is net of estimated forfeitures. The Company’s estimated forfeiture rates are based on its historical experience.

The following is a summary of the Company’s stock option activity and related information:

Shares

Weighted
Average
Exercise
Price

Weighted
Average
Remaining
Contractual
Life

Aggregate
Intrinsic
Value

(In thousands)

(Years)

(In millions)

Outstanding at December 31, 2016

6,011

42.25

Granted

1,327

60.31

Exercised

(1,065

)

29.56

Forfeited

(104

)

51.16

Expired

)

52.22

Outstanding at June 30, 2017

6,163

48.17

4.5

76.4

Exercisable at June 30, 2017

3,153

42.52

3.1

56.9

The aggregate intrinsic value of stock options exercised during the six months ended June 30, 2017 was $27.8 million. The total fair value of stock options vested during the six months ended June 30, 2017 was $10.5 million. As of June 30, 2017, there was approximately $27 million of expected future pre-tax compensation expense related to the 3.0 million nonvested stock options outstanding, which is expected to be recognized over a weighted average period of approximately two years.

The following is a summary of the Company’s nonvested restricted stock activity and related information:


	Shares			Weighted Average Grant Date Fair Value
	(In thousands)
Nonvested restricted stock outstanding at December 31, 2016		1,019		$	48.59
Granted		333			60.22
Vested		(271	)		45.10
Forfeited		(36	)		50.76

Nonvested restricted stock outstanding at June 30, 2017		1,045		$	53.13

The total fair value of restricted stock vested during the six months ended June 30, 2017 was $12.2 million. As of June 30, 2017, there was approximately $36 million of expected future pre-tax compensation expense related to the 1.0 million nonvested restricted shares outstanding, which is expected to be recognized over a weighted average period of approximately two years.

Retirement and Pension Plans

6 Months Ended

Jun. 30, 2017

Retirement Benefits [Abstract]

Retirement and Pension Plans

12.

Retirement and Pension Plans

The components of net periodic pension benefit expense (income) were as follows:


	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2017			2016			2017			2016
	(In thousands)
Defined benefit plans:
Service cost	$	1,883		$	1,669		$	3,738		$	3,328
Interest cost		6,857			7,627			13,662			15,240
Expected return on plan assets		(13,303	)		(12,977	)		(26,541	)		(25,946	)
Amortization of net actuarial loss and other		3,512			2,484			7,024			4,968

Pension income		(1,051	)		(1,197	)		(2,117	)		(2,410	)

Other plans:
Defined contribution plans		5,924			5,835			12,958			12,877
Foreign plans and other		1,412			1,342			2,888			2,678

Total other plans		7,336			7,177			15,846			15,555

Total net pension expense	$	6,285		$	5,980		$	13,729		$	13,145

For the six months ended June 30, 2017 and 2016, contributions to the Company’s defined benefit pension plans were $51.7 million and $1.8 million, respectively. The Company’s current estimate of 2017 contributions to its worldwide defined benefit pension plans is in line with the range disclosed in the Company’s Annual Report on Form 10-K for the year ended December 31, 2016.

Product Warranties

6 Months Ended

Jun. 30, 2017

Guarantees and Product Warranties [Abstract]

Product Warranties

13.

Product Warranties

The Company provides limited warranties in connection with the sale of its products. The warranty periods for products sold vary among the Company’s operations, but generally do not exceed one year. The Company calculates its warranty expense provision based on its historical warranty experience and adjustments are made periodically to reflect actual warranty expenses.

Changes in the accrued product warranty obligation were as follows:


	Six Months Ended
	June 30,
	2017			2016
	(In thousands)
Balance at the beginning of the period	$	22,007		$	22,761
Accruals for warranties issued during the period		7,983			6,734
Settlements made during the period		(8,380	)		(8,620	)
Warranty accruals related to acquired businesses and other during the period		2,133			984

Balance at the end of the period	$	23,743		$	21,859

Certain settlements of warranties made during the period were for specific nonrecurring warranty obligations. Product warranty obligations are reported as current liabilities in the consolidated balance sheet.

Contingencies

6 Months Ended

Jun. 30, 2017

Commitments and Contingencies Disclosure [Abstract]

Contingencies

14.

Contingencies

Asbestos Litigation

The Company (including its subsidiaries) has been named as a defendant in a number of asbestos-related lawsuits. Certain of these lawsuits relate to a business which was acquired by the Company and do not involve products which were manufactured or sold by the Company. In connection with these lawsuits, the seller of such business has agreed to indemnify the Company against these claims (the “Indemnified Claims”). The Indemnified Claims have been tendered to, and are being defended by, such seller. The seller has met its obligations, in all respects, and the Company does not have any reason to believe such party would fail to fulfill its obligations in the future. To date, no judgments have been rendered against the Company as a result of any asbestos-related lawsuit. The Company believes it has strong defenses to the claims being asserted and intends to continue to vigorously defend itself in these matters.

Environmental Matters

Certain historic processes in the manufacture of products have resulted in environmentally hazardous waste by-products as defined by federal and state laws and regulations. At June 30, 2017, the Company is named a Potentially Responsible Party (“PRP”) at 13 non-AMETEK-owned former waste disposal or treatment sites (the “non-owned” sites). The Company is identified as a “de minimis” party in 12 of these sites based on the low volume of waste attributed to the Company relative to the amounts attributed to other named PRPs. In eight of these sites, the Company has reached a tentative agreement on the cost of the de minimis settlement to satisfy its obligation and is awaiting executed agreements. The tentatively agreed-to settlement amounts are fully reserved. In the other four sites, the Company is continuing to investigate the accuracy of the alleged volume attributed to the Company as estimated by the parties primarily responsible for remedial activity at the sites to establish an appropriate settlement amount. At the remaining site where the Company is a non-de minimis PRP, the Company is participating in the investigation and/or related required remediation as part of a PRP Group and reserves have been established sufficient to satisfy the Company’s expected obligations. The Company historically has resolved these issues within established reserve levels and reasonably expects this result will continue. In addition to these non-owned sites, the Company has an ongoing practice of providing reserves for probable remediation activities at certain of its current or previously owned manufacturing locations (the “owned” sites). For claims and proceedings against the Company with respect to other environmental matters, reserves are established once the Company has determined that a loss is probable and estimable. This estimate is refined as the Company moves through the various stages of investigation, risk assessment, feasibility study and corrective action processes. In certain instances, the Company has developed a range of estimates for such costs and has recorded a liability based on the best estimate. It is reasonably possible that the actual cost of remediation of the individual sites could vary from the current estimates and the amounts accrued in the consolidated financial statements; however, the amounts of such variances are not expected to result in a material change to the consolidated financial statements. In estimating the Company’s liability for remediation, the Company also considers the likely proportionate share of the anticipated remediation expense and the ability of the other PRPs to fulfill their obligations.

Total environmental reserves at June 30, 2017 and December 31, 2016 were $28.0 million and $28.4 million, respectively, for both non-owned and owned sites. For the six months ended June 30, 2017, the Company recorded $2.2 million in reserves and the reserve increased $0.2 million due to foreign currency translation. Additionally, the Company spent $2.8 million on environmental matters for the six months ended June 30, 2017. The Company’s reserves for environmental liabilities at June 30, 2017 and December 31, 2016 include reserves of $12.1 million and $12.4 million, respectively, for an owned site acquired in connection with the 2005 acquisition of HCC Industries (“HCC”). The Company is the designated performing party for the performance of remedial activities for one of several operating units making up a Superfund site in the San Gabriel Valley of California. The Company has obtained indemnifications and other financial assurances from the former owners of HCC related to the costs of the required remedial activities. At June 30, 2017, the Company had $11.9 million in receivables related to HCC for probable recoveries from third-party escrow funds and other committed third-party funds to support the required remediation. Also, the Company is indemnified by HCC’s former owners for approximately $19 million of additional costs.

The Company has agreements with other former owners of certain of its acquired businesses, as well as new owners of previously owned businesses. Under certain of the agreements, the former or new owners retained, or assumed and agreed to indemnify the Company against, certain environmental and other liabilities under certain circumstances. The Company and some of these other parties also carry insurance coverage for some environmental matters. To date, these parties have met their obligations in all material respects.

The Company believes it has established reserves which are sufficient to perform all known responsibilities under existing claims and consent orders. The Company has no reason to believe that other third parties would fail to perform their obligations in the future. In the opinion of management, based on presently available information and the Company’s historical experience related to such matters, an adequate provision for probable costs has been made and the ultimate cost resulting from these actions is not expected to materially affect the consolidated results of operations, financial position or cash flows of the Company.

Reportable Segments

6 Months Ended

Jun. 30, 2017

Segment Reporting [Abstract]

Reportable Segments

15.

Reportable Segments

The Company has two reportable segments, Electronic Instruments Group (“EIG”) and Electromechanical Group (“EMG”). The Company’s operating segments are identified based on the existence of segment managers. Certain of the Company’s operating segments have been aggregated for segment reporting purposes primarily on the basis of product type, production processes, distribution methods and similarity of economic characteristics.

At June 30, 2017, there were no significant changes in identifiable assets of reportable segments from the amounts disclosed at December 31, 2016, other than those described in the acquisitions footnote (Note 8), nor were there any significant changes in the basis of segmentation or in the measurement of segment operating results. Operating information relating to the Company’s reportable segments for the three and six months ended June 30, 2017 and 2016 can be found in the table included in Part I, Item 2. “Management’s Discussion and Analysis of Financial Condition and Results of Operations” of this Quarterly Report on Form 10-Q.

Stockholders' Equity

6 Months Ended

Jun. 30, 2017

Equity [Abstract]

Stockholders' Equity

16.

Stockholders’ Equity

The Company had a Shareholder Rights Plan, which expired in June 2017. Under the Plan, the Company’s Board of Directors declared a dividend of one Right for each share of Company common stock owned at the close of business on June 2, 2007, and had authorized the issuance of one Right for each share of common stock of the Company issued between the Record Date and the Distribution Date. The Plan provided, under certain conditions involving acquisition of the Company’s common stock, that holders of Rights, except for the acquiring entity, would be entitled (i) to purchase shares of preferred stock at a specified exercise price, or (ii) to purchase shares of common stock of the Company, or the acquiring company, having a value of twice the Rights exercise price.

Restructuring Charges

6 Months Ended

Jun. 30, 2017

Restructuring and Related Activities [Abstract]

Restructuring Charges

17.

Restructuring Charges

During the fourth quarter of 2016, the Company recorded pre-tax restructuring charges totaling $25.6 million, which had the effect of reducing net income by $17.0 million. The restructuring charges were reported in the consolidated statement of income as follows: $24.0 million in Cost of sales and $1.6 million in Selling, general and administrative expenses. The restructuring charges were reported in segment operating income as follows: $12.4 million in EIG, $11.6 million in EMG and $1.6 million in corporate administrative expenses. The restructuring actions primarily related to $19.3 million in severance costs for a reduction in workforce and $6.2 million of asset write-downs in response to the impact of a weak global economy on certain of the Company’s businesses and the effects of a continued strong U.S. dollar. The restructuring activities will be broadly implemented across the Company’s various businesses through the end of 2017, with most actions expected to be completed in 2018.

During the fourth quarter of 2015, the Company recorded pre-tax restructuring charges totaling $20.7 million, which had the effect of reducing net income by $13.9 million. The restructuring charges were reported in the consolidated statement of income as follows: $20.0 million in Cost of sales and $0.7 million in Selling, general and administrative expenses. The restructuring charges were reported in segment operating income as follows: $9.3 million in EIG, $10.8 million in EMG and $0.7 million in corporate administrative expenses. The restructuring actions primarily related to a reduction in workforce in response to the impact of a weak global economy on certain of the Company’s businesses and the effects of a continued strong U.S. dollar. The restructuring activities have been broadly implemented across the Company’s various businesses with all actions expected to be completed in the second half of 2017.

Accrued liabilities in the Company’s consolidated balance sheet included amounts related to the fourth quarter of 2016 and fourth quarter of 2015 restructuring charges as follows (in millions):


	Fourth Quarter of 2016 Restructuring			Fourth Quarter of 2015 Restructuring
Balance at December 31, 2016	$	19.2		$	9.2
Utilization		(4.2	)		(1.6	)
Foreign currency translation adjustments and other		0.1			0.1

Balance at June 30, 2017	$	15.1		$	7.7

Recent Accounting Pronouncements (Policies)	6 Months Ended
Recent Accounting Pronouncements (Policies)	Jun. 30, 2017
Accounting Changes and Error Corrections [Abstract]
Revenue from Contracts with Customers	In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2014-09, Revenue from Contracts with Customers (“ASU 2014-09”) and modified the standard thereafter. The objective of ASU 2014-09 is to establish a single comprehensive model for entities to use in accounting for revenue arising from contracts with customers and will supersede most of the existing revenue recognition guidance. The core principle of ASU 2014-09 is that an entity recognizes revenue at the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. ASU 2014-09 applies to all contracts with customers except those that are within the scope of other topics in the FASB Accounting Standards Codification. ASU 2014-09 is effective for interim and annual reporting periods beginning after December 15, 2017 and may be early adopted for interim and annual reporting periods beginning after December 15, 2016. The Company will adopt ASU 2014-09 as of January 1, 2018. The guidance permits adoption by retrospectively applying the guidance to each prior reporting period presented (full retrospective method) or prospectively applying the guidance and providing additional disclosures comparing results to previous guidance, with the cumulative effect of initially applying the guidance recognized in beginning retained earnings at the date of initial application (modified retrospective method). The Company expects to use the modified retrospective method of adoption. ASU 2014-09 is primarily expected to impact the Company’s revenue recognition procedures by requiring recognition of certain revenues to move from upon shipment or delivery to over-time. The recording of certain revenues over-time is not expected to have a material impact on the Company’s consolidated results of operations or financial position. Also, the Company is developing the additional expanded disclosures required. The Company is in the process of identifying and implementing the appropriate changes to business processes and controls to support recognition and disclosure under ASU 2014-09. While the Company continues to finalize the overall potential impact of the new guidance, it does not currently expect the adoption of ASU 2014-09 to have a material impact on its consolidated results of operations, financial position and cash flows.
Simplifying the Measurement of Inventory	In July 2015, the FASB issued ASU No. 2015-11, Simplifying the Measurement of Inventory (“ASU 2015-11”), which applies to inventory that is measured using first-in, first-out (“FIFO”) or average cost. As prescribed in this update, an entity should measure inventory that is within scope at the lower of cost and net realizable value, which is the estimated selling prices in the ordinary course of business, less reasonably predictable costs of completion, disposal and transportation. Subsequent measurement is unchanged for inventory that is measured using last-in, first-out (“LIFO”). The Company prospectively adopted ASU 2015-11 effective January 1, 2017 and the adoption did not have a significant impact on the Company’s consolidated results of operations, financial position or cash flows.
Balance Sheet Classification of Deferred Taxes	In November 2015, the FASB issued ASU No. 2015-17, Balance Sheet Classification of Deferred Taxes (“ASU 2015-17”). ASU 2015-17 simplifies the presentation of deferred taxes by requiring deferred tax assets and liabilities be classified as noncurrent on the consolidated balance sheet. The Company prospectively adopted ASU 2015-17 effective January 1, 2017 and the adoption did not have a significant impact on the Company’s consolidated results of operations, financial position or cash flows. The December 31, 2016 consolidated balance sheet was not adjusted for the adoption of ASU 2015-17.
Leases	In February 2016, the FASB issued ASU No. 2016-02, Leases (“ASU 2016-02”). The new standard establishes a right-of-use model that requires a lessee to record a right-of-use asset and a lease liability on the balance sheet for all leases with terms longer than twelve months. Leases will be classified as either finance or operating, with classification affecting the pattern of expense recognition in the income statement. ASU 2016-02 is effective for interim and annual reporting periods beginning after December 15, 2018. ASU 2016-02 is to be adopted using a modified retrospective approach and early adoption is permitted. The Company has not determined the impact ASU 2016-02 may have on the Company’s consolidated results of operations, financial position, cash flows and financial statement disclosures.
Improvements to Employee Share-Based Payment Accounting	In March 2016, the FASB issued ASU No. 2016-09, Improvements to Employee Share-Based Payment Accounting (“ASU 2016-09”). ASU 2016-09 includes changes to the accounting for share-based payment transactions, including the income tax consequences, classification of awards as either equity or liabilities and classification on the statement of cash flows. The Company prospectively adopted ASU 2016-09 effective January 1, 2017. For the three and six months ended June 30, 2017, the Company recorded a tax benefit of $3.1 million and $8.9 million, respectively, within Provision for income taxes related to the tax effects of share-based payment transactions. Prior to adoption, this amount would have been recorded as a component of Capital in excess of par value. The adoption of this standard could create volatility in the Company’s effective tax rate going forward. The Company elected not to change its accounting policy with respect to the estimation of forfeitures. The Company no longer reclassifies the excess tax benefits from share-based payments from operating activities to financing activities in the consolidated statement of cash flows. For the three and six months ended June 30, 2017, the Company excluded the excess tax benefits from the assumed proceeds available to repurchase shares in the computation of its diluted earnings per share and the related increase in the Company’s diluted weighted average common shares outstanding was not significant.
Clarifying the Definition of a Business	In January 2017, the FASB issued ASU No. 2017-01, Clarifying the Definition of a Business (“ASU 2017-01”). ASU 2017-01 provides a more robust framework to use in determining when a set of assets and activities is a business. ASU 2017-01 requires an entity to evaluate if substantially all of the fair value of the gross assets acquired is concentrated in a single identifiable asset or a group of similar identifiable assets; if so, the set of assets is not a business. ASU 2017-01 requires that, to be a business, the set must include, at a minimum, an input and a substantive process that together significantly contribute to the ability to create outputs. ASU 2017-01 is effective for interim and annual reporting periods beginning after December 15, 2017. ASU 2017-01 will be applied prospectively to any transactions occurring within the period of adoption. Early adoption is permitted, including for interim or annual periods in which the financial statements have not been issued or made available for issuance. The Company does not expect the adoption of ASU 2017-01 to have a significant impact on the Company’s consolidated results of operations, financial position, cash flows and financial statement disclosures.
Simplifying the Test for Goodwill Impairment	In January 2017, the FASB issued ASU No. 2017-04, Simplifying the Test for Goodwill Impairment (“ASU 2017-04”). ASU 2017-04 eliminates the requirement to calculate the implied fair value of goodwill (second step) to measure a goodwill impairment charge. Under the guidance, an impairment charge will be measured based on the excess of the reporting unit’s carrying amount over its fair value (first step). ASU 2017-04 is effective for interim and annual reporting periods beginning after December 15, 2019 and early adoption is permitted. The Company early adopted ASU 2017-04 effective January 1, 2017 and the adoption did not have a significant impact on the Company’s consolidated results of operations, financial position, cash flows and financial statement disclosures.
Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost	In March 2017, the FASB issued ASU No. 2017-07, Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost (“ASU 2017-07”), which changes how employers that sponsor defined benefit pension and/or other postretirement benefit plans present the net periodic benefit cost in the income statement. ASU 2017-07 requires employers to present the service cost component of net periodic benefit cost in the same income statement line item as other employee compensation costs. All other components of the net periodic benefit cost will be presented outside of operating income. ASU 2017-07 is effective for interim and annual reporting periods beginning after December 15, 2017 and early adoption is permitted. The Company has not determined the impact ASU 2017-07 may have on the Company’s consolidated results of operations, financial position or cash flows.
Scope of Modification Accounting	In May 2017, the FASB issued ASU No. 2017-09, Scope of Modification Accounting (“ASU 2017-09”). ASU 2017-09 clarifies which changes to the terms or conditions of a share-based payment award require an entity to apply modification accounting. ASU 2017-09 is effective for interim and annual reporting periods beginning after December 15, 2017 and early adoption is permitted. The Company does not expect the adoption of ASU 2017-09 to have a significant impact on the Company’s consolidated results of operations, financial position or cash flows.

Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2017

Earnings Per Share [Abstract]

Number of Weighted Average Shares

The number of weighted average shares used in the calculation of basic earnings per share and diluted earnings per share was as follows:

Three Months Ended

Six Months Ended

June 30,

2017

2016

2017

2016

(In thousands)

Weighted average shares:

Basic shares

230,158

233,285

229,853

234,134

Equity-based compensation plans

1,430

1,505

1,443

1,369

Diluted shares

231,588

234,790

231,296

235,503

Accumulated Other Comprehensive Income (Loss) (Tables)

6 Months Ended

Jun. 30, 2017

Equity [Abstract]

Components of Accumulated Other Comprehensive Income (Loss)

The components of accumulated other comprehensive income (loss) consisted of the following:


	Three Months Ended									Three Months Ended
	June 30, 2017									June 30, 2016
	Foreign Currency Items and Other			Defined Benefit Pension Plans			Total			Foreign Currency Items and Other			Defined Benefit Pension Plans			Total
	(In thousands)
Balance at the beginning of the period	$	(330,569	)	$	(201,567	)	$	(532,136	)	$	(217,102	)	$	(153,423	)	$	(370,525	)

Other comprehensive income (loss) before reclassifications:
Translation adjustments		59,525			—			59,525			(37,819	)		—			(37,819	)
Change in long-term intercompany notes		15,988			—			15,988			(9,904	)		—			(9,904	)
Net investment hedges		(63,933	)		—			(63,933	)		(10,271	)		—			(10,271	)
Gross amounts reclassified from accumulated other comprehensive income (loss)		—			3,512			3,512			—			2,484			2,484
Income tax benefit (expense)		24,067			(1,321	)		22,746			3,595			(869	)		2,726

Other comprehensive (loss) income, net of tax		35,647			2,191			37,838			(54,399	)		1,615			(52,784	)

Balance at the end of the period	$	(294,922	)	$	(199,376	)	$	(494,298	)	$	(271,501	)	$	(151,808	)	$	(423,309	)


	Six Months Ended									Six Months Ended
	June 30, 2017									June 30, 2016
	Foreign Currency Items and Other			Defined Benefit Pension Plans			Total			Foreign Currency Items and Other			Defined Benefit Pension Plans			Total
	(In thousands)
Balance at the beginning of the period	$	(338,631	)	$	(203,758	)	$	(542,389	)	$	(250,593	)	$	(155,038	)	$	(405,631	)

Other comprehensive income (loss) before reclassifications:
Translation adjustments		64,204			—			64,204			(16,140	)		—			(16,140	)
Change in long-term intercompany notes		18,692			—			18,692			3,799			—			3,799
Net investment hedges		(62,889	)		—			(62,889	)		(13,181	)		—			(13,181	)
Gross amounts reclassified from accumulated other comprehensive income (loss)		—			7,024			7,024			—			4,968			4,968
Income tax benefit (expense)		23,702			(2,642	)		21,060			4,614			(1,738	)		2,876

Other comprehensive (loss) income, net of tax		43,709			4,382			48,091			(20,908	)		3,230			(17,678	)

Balance at the end of the period	$	(294,922	)	$	(199,376	)	$	(494,298	)	$	(271,501	)	$	(151,808	)	$	(423,309	)

Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2017

Fair Value Disclosures [Abstract]

Fair Value of Assets Measured on Recurring Basis

The following table provides the Company’s assets that are measured at fair value on a recurring basis as of June 30, 2017 and December 31, 2016, consistent with the fair value hierarchy:


	June 30, 2017		December 31, 2016
	Fair Value		Fair Value
	(In thousands)
Fixed-income investments	$	7,749	$	7,317

Fair Value Disclosures of Financial Instrument Liabilities


	June 30, 2017						December 31, 2016
	Recorded Amount			Fair Value			Recorded Amount			Fair Value
	(In thousands)
Short-term borrowings, net	$	—		$	—		$	—		$	—
Long-term debt, net (including current portion)		(2,401,388	)		(2,435,560	)		(2,341,565	)		(2,386,901	)

Inventories, Net (Tables)

6 Months Ended

Jun. 30, 2017

Inventory Disclosure [Abstract]

Inventories


	June 30,		December 31,
	2017		2016
	(In thousands)
Finished goods and parts	$	83,126	$	75,827
Work in process		114,777		101,484
Raw materials and purchased parts		343,310		314,793

Total inventories, net	$	541,213	$	492,104

Acquisitions (Tables)

6 Months Ended

Jun. 30, 2017

Business Combinations [Abstract]

Allocation of Aggregate Purchase Price of Acquired Net Assets


Property, plant and equipment	$	21.5
Goodwill		256.0
Other intangible assets		269.5
Long-term liabilities		(10.6	)
Deferred income taxes		(27.2	)
Net working capital and other⁽¹⁾		34.9

Total purchase price		544.1
Less: Contingent payment liability		(25.5	)

Total cash paid	$	518.6

(1)	Includes $30.7 million in accounts receivable, whose fair value, contractual cash flows and expected cash flows are approximately equal.

Goodwill (Tables)

6 Months Ended

Jun. 30, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Changes in Carrying Amounts of Goodwill by Segment

The changes in the carrying amounts of goodwill by segment were as follows:

Electronic
Instruments
Group

Electro-
mechanical
Group

Total

(In millions)

Balance at December 31, 2016

1,817.0

1,002.0

2,819.0

Goodwill acquired

256.0

—

256.0

Purchase price allocation adjustments and other

—

0.6

Foreign currency translation adjustments

21.0

20.5

41.5

Balance at June 30, 2017

2,094.0

1,023.1

3,117.1

Income Taxes (Tables)

6 Months Ended

Jun. 30, 2017

Income Tax Disclosure [Abstract]

Reconciliation of Liability for Uncertain Tax Positions

The following is a reconciliation of the liability for uncertain tax positions (in millions):


Balance at December 31, 2016	$	57.9
Additions for tax positions		4.0
Reductions for tax positions		(0.2	)

Balance at June 30, 2017	$	61.7

Share-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2017

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Total Share-Based Compensation Expense

Total share-based compensation expense was as follows:


	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2017		2016		2017		2016
	(In thousands)
Stock option expense	$	2,754	$	3,224	$	4,967	$	5,323
Restricted stock expense		6,031		2,732		9,146		5,712

Total pre-tax expense	$	8,785	$	5,956	$	14,113	$	11,035

Weighted Average Assumptions Used for Estimating Fair Values of Stock Options Granted

The following weighted average assumptions were used in the Black-Scholes-Merton model to estimate the fair values of stock options granted during the periods indicated:


	Six Months Ended			Year Ended
	June 30, 2017			December 31, 2016
Expected volatility		18.0	%		21.8	%
Expected term (years)		5.0			5.0
Risk-free interest rate		1.94	%		1.23	%
Expected dividend yield		0.60	%		0.77	%
Black-Scholes-Merton fair value per stock option granted	$	11.05		$	9.14

Summary of Stock Option Activity and Related Information

The following is a summary of the Company’s stock option activity and related information:

Shares

Weighted
Average
Exercise
Price

Weighted
Average
Remaining
Contractual
Life

Aggregate
Intrinsic
Value

(In thousands)

(Years)

(In millions)

Outstanding at December 31, 2016

6,011

42.25

Granted

1,327

60.31

Exercised

(1,065

)

29.56

Forfeited

(104

)

51.16

Expired

)

52.22

Outstanding at June 30, 2017

6,163

48.17

4.5

76.4

Exercisable at June 30, 2017

3,153

42.52

3.1

56.9

Summary of Nonvested Restricted Stock Activity and Related Information

The following is a summary of the Company’s nonvested restricted stock activity and related information:


	Shares			Weighted Average Grant Date Fair Value
	(In thousands)
Nonvested restricted stock outstanding at December 31, 2016		1,019		$	48.59
Granted		333			60.22
Vested		(271	)		45.10
Forfeited		(36	)		50.76

Nonvested restricted stock outstanding at June 30, 2017		1,045		$	53.13

Retirement and Pension Plans (Tables)

6 Months Ended

Jun. 30, 2017

Retirement Benefits [Abstract]

Components of Net Periodic Pension Benefit Expense (Income)

The components of net periodic pension benefit expense (income) were as follows:


	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2017			2016			2017			2016
	(In thousands)
Defined benefit plans:
Service cost	$	1,883		$	1,669		$	3,738		$	3,328
Interest cost		6,857			7,627			13,662			15,240
Expected return on plan assets		(13,303	)		(12,977	)		(26,541	)		(25,946	)
Amortization of net actuarial loss and other		3,512			2,484			7,024			4,968

Pension income		(1,051	)		(1,197	)		(2,117	)		(2,410	)

Other plans:
Defined contribution plans		5,924			5,835			12,958			12,877
Foreign plans and other		1,412			1,342			2,888			2,678

Total other plans		7,336			7,177			15,846			15,555

Total net pension expense	$	6,285		$	5,980		$	13,729		$	13,145

Product Warranties (Tables)

6 Months Ended

Jun. 30, 2017

Guarantees and Product Warranties [Abstract]

Changes in Accrued Product Warranty Obligation

Changes in the accrued product warranty obligation were as follows:


	Six Months Ended
	June 30,
	2017			2016
	(In thousands)
Balance at the beginning of the period	$	22,007		$	22,761
Accruals for warranties issued during the period		7,983			6,734
Settlements made during the period		(8,380	)		(8,620	)
Warranty accruals related to acquired businesses and other during the period		2,133			984

Balance at the end of the period	$	23,743		$	21,859

Restructuring Charges (Tables)

6 Months Ended

Jun. 30, 2017

Restructuring and Related Activities [Abstract]

Schedule of Accrued Liabilities in Company's Consolidated Balance Sheet Included Amounts Related to Restructuring Charges

Accrued liabilities in the Company’s consolidated balance sheet included amounts related to the fourth quarter of 2016 and fourth quarter of 2015 restructuring charges as follows (in millions):


	Fourth Quarter of 2016 Restructuring			Fourth Quarter of 2015 Restructuring
Balance at December 31, 2016	$	19.2		$	9.2
Utilization		(4.2	)		(1.6	)
Foreign currency translation adjustments and other		0.1			0.1

Balance at June 30, 2017	$	15.1		$	7.7

Recent Accounting Pronouncements - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2017
Accounting Standards Update 2016-09 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Provision for income taxes related to the tax effects of share-based payment transactions	$ 3.1	$ 8.9

Earnings Per Share - Number of Weighted Average Shares (Detail) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Weighted average shares:
Basic shares	230,158	233,285	229,853	234,134
Equity-based compensation plans	1,430	1,505	1,443	1,369
Diluted shares	231,588	234,790	231,296	235,503

Accumulated Other Comprehensive Income (Loss) - Components of Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at the beginning of the period			$ 3,256,513
Other comprehensive income (loss) before reclassifications:
Translation adjustments	$ 59,525	$ (37,819)	64,204	$ (16,140)
Change in long-term intercompany notes	15,988	(9,904)	18,692	3,799
Net investment hedges	(63,933)	(10,271)	(62,889)	(13,181)
Gross amounts reclassified from accumulated other comprehensive income (loss)	3,512	2,484	7,024	4,968
Income tax benefit (expense)	22,746	2,726	21,060	2,876
Other comprehensive (loss) income, net of tax	37,838	(52,784)	48,091	(17,678)
Balance at the end of the period	3,592,196		3,592,196
Foreign Currency Items and Other [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at the beginning of the period	(330,569)	(217,102)	(338,631)	(250,593)
Other comprehensive income (loss) before reclassifications:
Translation adjustments	59,525	(37,819)	64,204	(16,140)
Change in long-term intercompany notes	15,988	(9,904)	18,692	3,799
Net investment hedges	(63,933)	(10,271)	(62,889)	(13,181)
Income tax benefit (expense)	24,067	3,595	23,702	4,614
Other comprehensive (loss) income, net of tax	35,647	(54,399)	43,709	(20,908)
Balance at the end of the period	(294,922)	(271,501)	(294,922)	(271,501)
Defined Benefit Pension Plans [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at the beginning of the period	(201,567)	(153,423)	(203,758)	(155,038)
Other comprehensive income (loss) before reclassifications:
Gross amounts reclassified from accumulated other comprehensive income (loss)	3,512	2,484	7,024	4,968
Income tax benefit (expense)	(1,321)	(869)	(2,642)	(1,738)
Other comprehensive (loss) income, net of tax	2,191	1,615	4,382	3,230
Balance at the end of the period	(199,376)	(151,808)	(199,376)	(151,808)
Accumulated Other Comprehensive Loss [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at the beginning of the period	(532,136)	(370,525)	(542,389)	(405,631)
Other comprehensive income (loss) before reclassifications:
Balance at the end of the period	$ (494,298)	$ (423,309)	$ (494,298)	$ (423,309)

Fair Value Measurements - Fair Value of Assets Measured on Recurring Basis (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fixed-income investments	$ 7,749	$ 7,317

Fair Value Measurements - Additional Information (Detail) - USD ($)	Jun. 30, 2017	Jun. 30, 2016
Fair Value Disclosures [Abstract]
Fair Value, Assets, Level 1 to Level 2 Transfers, Amount	$ 0	$ 0
Fair Value, Assets, Level 2 to Level 1 Transfers, Amount	$ 0	$ 0

Fair Value Measurements - Fair Value Disclosures of Financial Instrument Liabilities (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Recorded Amount [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Short-term borrowings, net	$ 0	$ 0
Long-term debt, net (including current portion)	(2,401,388)	(2,341,565)
Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Short-term borrowings, net	0	0
Long-term debt, net (including current portion)	$ (2,435,560)	$ (2,386,901)

Hedging Activities - Additional Information (Detail) - Foreign Exchange Contract [Member] - Designated as Hedging Instrument [Member] $ in Millions	6 Months Ended
	Jun. 30, 2017 USD ($)
Derivative [Line Items]
Percentage of effectiveness on net investment hedges	100.00%
Currency remeasurement losses	$ (62.9)
British-Pound-Denominated Loans [Member]
Derivative [Line Items]
Hedge against net investment in foreign subsidiaries	396.3
Euro Loan [Member]
Derivative [Line Items]
Hedge against net investment in foreign subsidiaries	$ 570.6

Inventories, Net - Inventories (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Inventory Disclosure [Abstract]
Finished goods and parts	$ 83,126	$ 75,827
Work in process	114,777	101,484
Raw materials and purchased parts	343,310	314,793
Total inventories, net	$ 541,213	$ 492,104

Acquisitions - Additional Information (Detail) - USD ($)		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2017	Jun. 30, 2016
Business Acquisition [Line Items]
Purchases of businesses, net of cash acquired		$ 518,634,000	$ 293,468,000
Total other intangible assets acquired	$ 269,500,000	269,500,000
Indefinite-lived intangible trade names acquired		53,600,000
Finite-lived intangible assets acquired		215,900,000
Customer Relationship [Member]
Business Acquisition [Line Items]
Finite-lived intangible assets acquired		$ 162,000,000
Amortization period for finite-lived intangible asset		18 years
Purchased Technology [Member]
Business Acquisition [Line Items]
Finite-lived intangible assets acquired		$ 53,900,000
Amortization period for finite-lived intangible asset		18 years
Rauland Borg and Mocon Incorporation [Member]
Business Acquisition [Line Items]
Goodwill recorded in connection with acquisitions	146,400,000	$ 146,400,000
Total other intangible assets acquired	269,500,000	269,500,000
Future amortization expense, 2017	12,000,000	12,000,000
Future amortization expense, 2018	12,000,000	12,000,000
Future amortization expense, 2019	12,000,000	12,000,000
Future amortization expense, 2020	12,000,000	12,000,000
Future amortization expense, 2021	12,000,000	12,000,000
Contingent payment liability	25,500,000	25,500,000
Rauland-Borg [Member]
Business Acquisition [Line Items]
Maximum contingent payment for acquisition	30,000,000	30,000,000
Minimum contingent payment for acquisition	0	0
Rauland-Borg [Member] \| Fair Value, Inputs, Level 3 [Member]
Business Acquisition [Line Items]
Contingent payment liability	25,500,000	$ 25,500,000
Change in contingent payment liability	$ 0

Acquisitions - Allocation of Aggregate Purchase Price of Acquired Net Assets (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Business Acquisition [Line Items]
Goodwill	$ 3,117,129	$ 2,818,950
Other intangible assets	269,500
Rauland Borg and Mocon Incorporation [Member]
Business Acquisition [Line Items]
Property, plant and equipment	21,500
Goodwill	256,000
Other intangible assets	269,500
Long-term liabilities	(10,600)
Deferred income taxes	(27,200)
Net working capital and other	34,900
Total purchase price	544,100
Less: Contingent payment liability	(25,500)
Total cash paid	$ 518,600

Acquisitions - Allocation of Aggregate Purchase Price of Acquired Net Assets (Parenthetical) (Detail) $ in Millions	Jun. 30, 2017 USD ($)
Rauland Borg and Mocon Incorporation [Member]
Business Acquisition [Line Items]
Accounts receivable included in purchase price	$ 30.7

Goodwill - Changes in Carrying Amounts of Goodwill by Segment (Detail) $ in Thousands	6 Months Ended
	Jun. 30, 2017 USD ($)
Goodwill [Line Items]
Goodwill, beginning balance	$ 2,818,950
Goodwill acquired	256,000
Purchase price allocation adjustments and other	600
Foreign currency translation adjustments	41,500
Goodwill, ending balance	3,117,129
Electronic Instruments Group [Member]
Goodwill [Line Items]
Goodwill, beginning balance	1,817,000
Goodwill acquired	256,000
Foreign currency translation adjustments	21,000
Goodwill, ending balance	2,094,000
Electromechanical Group [Member]
Goodwill [Line Items]
Goodwill, beginning balance	1,002,000
Purchase price allocation adjustments and other	600
Foreign currency translation adjustments	20,500
Goodwill, ending balance	$ 1,023,100

Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	Jun. 30, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Gross unrecognized tax benefits	$ 61.7	$ 57.9
The total amount of unrecognized tax benefits that would impact tax rate, if recognized	$ 52.1

Income Taxes - Reconciliation of Liability for Uncertain Tax Positions (Detail) $ in Millions	6 Months Ended
	Jun. 30, 2017 USD ($)
Income Tax Disclosure [Abstract]
Balance at December 31, 2016	$ 57.9
Additions for tax positions	4.0
Reductions for tax positions	(0.2)
Balance at June 30, 2017	$ 61.7

Share-Based Compensation - Total Share-Based Compensation Expense (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock option expense	$ 2,754	$ 3,224	$ 4,967	$ 5,323
Restricted stock expense	6,031	2,732	9,146	5,712
Total pre-tax expense	$ 8,785	$ 5,956	$ 14,113	$ 11,035

Share-Based Compensation - Additional Information (Detail) - USD ($) shares in Thousands, $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2017	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate intrinsic value of stock options exercised		$ 27.8
Total fair value of stock options vested		10.5
Expected future pre-tax compensation expense, nonvested stock options	$ 27.0	$ 27.0
Nonvested stock option outstanding	3,000	3,000
Weighted average period to recognize expected future pre-tax compensation expense (in years)		2 years
Executive Chairman of the Board of Directors [Member] \| Corporate Administrative Expenses [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Pre-tax share-based compensation expense	$ 2.5
Restricted Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average period to recognize expected future pre-tax compensation expense (in years)		2 years
Total fair value of vested restricted stock		$ 12.2
Expected future pre-tax compensation expense, nonvested restricted shares	$ 36.0	$ 36.0
Nonvested restricted stock outstanding	1,045	1,045	1,019

Share-Based Compensation - Weighted Average Assumptions Used for Estimating Fair Values of Stock Options Granted (Detail) - $ / shares	6 Months Ended	12 Months Ended
	Jun. 30, 2017	Dec. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Expected volatility	18.00%	21.80%
Expected term (years)	5 years	5 years
Risk-free interest rate	1.94%	1.23%
Expected dividend yield	0.60%	0.77%
Black-Scholes-Merton fair value per stock option granted	$ 11.05	$ 9.14

Share-Based Compensation - Summary of Stock Option Activity and Related Information (Detail) $ / shares in Units, shares in Thousands, $ in Millions	6 Months Ended
	Jun. 30, 2017 USD ($) $ / shares shares
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Beginning balance, Outstanding, Shares \| shares	6,011
Granted, Shares \| shares	1,327
Exercised, Shares \| shares	(1,065)
Forfeited, Shares \| shares	(104)
Expired, Shares \| shares	(6)
Ending balance, Outstanding, Shares \| shares	6,163
Ending balance, Exercisable, Shares \| shares	3,153
Beginning balance, Outstanding, Weighted Average Exercise Price \| $ / shares	$ 42.25
Granted, Weighted Average Exercise Price \| $ / shares	60.31
Exercised, Weighted Average Exercise Price \| $ / shares	29.56
Forfeited, Weighted Average Exercise Price \| $ / shares	51.16
Expired, Weighted Average Exercise Price \| $ / shares	52.22
Ending balance, Outstanding, Weighted Average Exercise Price \| $ / shares	48.17
Ending balance, Exercisable, Weighted Average Exercise Price \| $ / shares	$ 42.52
Ending balance, Outstanding, Weighted Average Remaining Contractual Life (Years)	4 years 6 months
Ending balance, Exercisable, Weighted Average Remaining Contractual Life (Years)	3 years 1 month 6 days
Ending balance, Outstanding, Aggregate Intrinsic Value \| $	$ 76.4
Ending balance, Exercisable, Aggregate Intrinsic Value \| $	$ 56.9

Share-Based Compensation - Summary of Nonvested Restricted Stock Activity and Related Information (Detail) - Restricted Shares [Member] shares in Thousands	6 Months Ended
	Jun. 30, 2017 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Beginning balance, Nonvested restricted stock outstanding \| shares	1,019
Granted \| shares	333
Vested \| shares	(271)
Forfeited \| shares	(36)
Ending balance, Nonvested restricted stock outstanding \| shares	1,045
Beginning balance, Nonvested, Weighted Average Grant Date Fair Value \| $ / shares	$ 48.59
Granted, Weighted Average Grant Date Fair Value \| $ / shares	60.22
Vested, Weighted Average Grant Date Fair Value \| $ / shares	45.10
Forfeited, Weighted Average Grant Date Fair Value \| $ / shares	50.76
Ending balance, Nonvested, Weighted Average Grant Date Fair Value \| $ / shares	$ 53.13

Retirement and Pension Plans - Components of Net Periodic Pension Benefit Expense (Income) (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Defined benefit plans:
Service cost	$ 1,883	$ 1,669	$ 3,738	$ 3,328
Interest cost	6,857	7,627	13,662	15,240
Expected return on plan assets	(13,303)	(12,977)	(26,541)	(25,946)
Amortization of net actuarial loss and other	3,512	2,484	7,024	4,968
Pension income	(1,051)	(1,197)	(2,117)	(2,410)
Other plans:
Defined contribution plans	5,924	5,835	12,958	12,877
Foreign plans and other	1,412	1,342	2,888	2,678
Total other plans	7,336	7,177	15,846	15,555
Total net pension expense	$ 6,285	$ 5,980	$ 13,729	$ 13,145

Retirement and Pension Plans - Additional Information (Detail) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Retirement Benefits [Abstract]
Defined benefit pension plan contributions	$ 51.7	$ 1.8

Product Warranties - Additional Information (Detail)	6 Months Ended
Product Warranties - Additional Information (Detail)	Jun. 30, 2017
Product Warranties Disclosures [Abstract]
Product warranty description	The Company provides limited warranties in connection with the sale of its products. The warranty periods for products sold vary among the Company's operations, but generally do not exceed one year.

Product Warranties - Changes in Accrued Product Warranty Obligation (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Guarantees [Abstract]
Balance at the beginning of the period	$ 22,007	$ 22,761
Accruals for warranties issued during the period	7,983	6,734
Settlements made during the period	(8,380)	(8,620)
Warranty accruals related to acquired businesses and other during the period	2,133	984
Balance at the end of the period	$ 23,743	$ 21,859

Contingencies - Additional Information (Detail) $ in Millions		6 Months Ended
	Jun. 30, 2017 USD ($) site	Jun. 30, 2017 USD ($) site	Dec. 31, 2016 USD ($)
Site Contingency [Line Items]
Number of non-owned sites Company is named Potentially Responsible Party \| site	13	13
Number of non-owned sites the Company is identified as a de minimis party \| site	12	12
Number of non-owned sites Company has reached tentative settlement agreement \| site	8	8
Number of non-owned sites Company is still working to establish settlement amount \| site	4	4
Total environmental reserves	$ 28.0	$ 28.0	$ 28.4
Increase (decrease) in environmental reserves		2.2
Total expenses related to environmental matters		2.8
Foreign currency translation		0.2
HCC Industries [Member]
Site Contingency [Line Items]
Reserves related to an owned site acquired	12.1	12.1	$ 12.4
Receivables related to HCC for probable recoveries from third-party funds	11.9	$ 11.9
Amount for which the Company is indemnified by HCC's former owners	$ 19.0

Reportable Segments - Additional Information (Detail)	6 Months Ended
Reportable Segments - Additional Information (Detail)	Jun. 30, 2017 Segment
Segment Reporting [Abstract]
Number of reportable segments	2

Stockholders' Equity - Additional Information (Detail)	6 Months Ended
Stockholders' Equity - Additional Information (Detail)	Jun. 30, 2017 Right
Statement of Stockholders' Equity [Abstract]
Stockholders right expiration date	2017-06
Number of rights per common share declared under the Shareholder Rights Plan	1

Restructuring Charges - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Restructuring Cost and Reserve [Line Items]
Reduction in net income due to restructuring charges	$ 17.0	$ 13.9
Restructuring charges	25.6	20.7
Severance cost	19.3
Asset write-downs	6.2
Electronic Instruments Group [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	12.4	9.3
Electromechanical Group [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	11.6	10.8
Cost of Sales, Excluding Depreciation [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	24.0	20.0
Selling, General and Administrative Expenses [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	1.6	0.7
Corporate Administrative Expenses [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 1.6	$ 0.7

Restructuring Charges - Schedule of Accrued Liabilities in Company's Consolidated Balance Sheet Included Amounts Related to Restructuring Charges (Detail) $ in Millions	6 Months Ended
	Jun. 30, 2017 USD ($)
Fourth Quarter of 2016 Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring reserve, beginning balance	$ 19.2
Utilization	(4.2)
Foreign currency translation adjustments and other	0.1
Restructuring reserve, ending balance	15.1
Fourth Quarter of 2015 Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring reserve, beginning balance	9.2
Utilization	(1.6)
Foreign currency translation adjustments and other	0.1
Restructuring reserve, ending balance	$ 7.7