Acquisitions and Divestitures - Allocation of Acquisition Costs to Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Aug. 31, 2016	Jul. 01, 2016	Mar. 16, 2016	Dec. 31, 2015	Jul. 01, 2015	Jun. 10, 2015	May 29, 2015	Dec. 31, 2014	Apr. 28, 2014
Business Acquisition [Line Items]
Accounts receivable		$ 29,900
Inventory		62,170
Other current assets, net of cash acquired		5,512
Property, plant and equipment		24,167
Goodwill	$ 1,632,592	290,393			$ 1,396,529				$ 1,321,277
Intangible assets		217,677
Deferred income taxes		3,515
Total assets acquired		633,334
Current liabilities		(22,186)
Deferred income taxes		(77,809)
Other noncurrent liabilities		(23,338)
Net assets acquired		510,001
Akron Brass
Business Acquisition [Line Items]
Accounts receivable				$ 14,523
Inventory				29,157
Other current assets, net of cash acquired				446
Property, plant and equipment				12,195
Goodwill				124,643
Intangible assets				90,400
Deferred income taxes				0
Total assets acquired				271,364
Current liabilities				(7,081)
Deferred income taxes				(36,439)
Other noncurrent liabilities				(6,445)
Net assets acquired				$ 221,399
AWG Fittings
Business Acquisition [Line Items]
Accounts receivable			$ 5,952
Inventory			11,766
Other current assets, net of cash acquired			565
Property, plant and equipment			6,847
Goodwill			22,031
Intangible assets			10,279
Deferred income taxes			3,515
Total assets acquired			60,955
Current liabilities			(5,017)
Deferred income taxes			0
Other noncurrent liabilities			(8,444)
Net assets acquired			$ 47,494
SFC-Koenig
Business Acquisition [Line Items]
Accounts receivable		9,425
Inventory		21,247
Other current assets, net of cash acquired		4,501
Property, plant and equipment		5,125
Goodwill		143,719
Intangible assets		116,998
Deferred income taxes		0
Total assets acquired		301,015
Current liabilities		(10,088)
Deferred income taxes		(41,370)
Other noncurrent liabilities		(8,449)
Net assets acquired		$ 241,108
Novotema
Business Acquisition [Line Items]
Accounts receivable								$ 8,029
Inventory								2,886
Other current assets, net of cash acquired								1,866
Property, plant and equipment								11,844
Goodwill								34,316
Intangible assets					20,000			20,011
Total assets acquired								78,952
Current liabilities								(7,760)
Deferred income taxes								(7,803)
Other noncurrent liabilities								(2,291)
Net assets acquired								$ 61,098
Alfa Valvole
Business Acquisition [Line Items]
Accounts receivable							$ 13,487
Inventory							11,036
Other current assets, net of cash acquired							3,367
Property, plant and equipment							8,395
Goodwill							69,568
Intangible assets					32,100		32,058
Total assets acquired							137,911
Current liabilities							(11,279)
Deferred income taxes							(12,622)
Other noncurrent liabilities							(1,420)
Net assets acquired							$ 112,590
CPS
Business Acquisition [Line Items]
Accounts receivable						$ 945
Inventory						442
Other current assets, net of cash acquired						79
Property, plant and equipment						1,105
Goodwill						9,739
Intangible assets					12,300	12,290
Total assets acquired						24,600
Current liabilities						(420)
Deferred income taxes						0
Other noncurrent liabilities						0
Net assets acquired						$ 24,180
Other
Business Acquisition [Line Items]
Accounts receivable					0
Inventory					1,102
Other current assets, net of cash acquired					0
Property, plant and equipment					0
Goodwill					748
Intangible assets					0
Total assets acquired					1,850
Current liabilities					0
Deferred income taxes					0
Other noncurrent liabilities					0
Net assets acquired					1,850
Acquisitions in 2015
Business Acquisition [Line Items]
Accounts receivable					22,461
Inventory					15,466
Other current assets, net of cash acquired					5,312
Property, plant and equipment					21,344
Goodwill					114,371
Intangible assets					64,359
Total assets acquired					243,313
Current liabilities					(19,459)
Deferred income taxes					(20,425)
Other noncurrent liabilities					(3,711)
Net assets acquired					$ 199,718
Aegis
Business Acquisition [Line Items]
Accounts receivable										$ 1,147
Inventory										6,230
Other current assets, net of cash acquired										232
Property, plant and equipment										2,988
Goodwill										7,711
Intangible assets										8,770
Total assets acquired										27,078
Current liabilities										(1,633)
Net assets acquired										$ 25,445