Acquisitions - Additional Information (Detail)	12 Months Ended			12 Months Ended	0 Months Ended	12 Months Ended		0 Months Ended				0 Months Ended			0 Months Ended		1 Months Ended
	Dec. 31, 2013 USD ($)	Dec. 31, 2012 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2012 Cost of goods sold USD ($)	Apr. 28, 2014 Aegis Flow Technologies [Member] USD ($)	Dec. 31, 2014 Aegis Flow Technologies [Member] USD ($)	Apr. 28, 2014 Aegis Flow Technologies [Member] USD ($)	Mar. 18, 2013 FTL USD ($)	Mar. 18, 2013 FTL GBP (£)	Apr. 11, 2012 PPC USD ($)	Dec. 31, 2012 PPC USD ($)	Apr. 30, 2012 ERC USD ($)	Apr. 30, 2012 ERC JPY (¥)	Dec. 31, 2012 ERC USD ($)	Jul. 20, 2012 Matcon USD ($)	Jul. 20, 2012 Matcon GBP (£)	Nov. 30, 2013 Matcon USD ($)	Apr. 30, 2013 Matcon USD ($)	Dec. 31, 2012 Matcon USD ($)
Business Acquisition [Line Items]
Annual revenue of entity acquired					$ 15,000,000
Business combination, cash consideration paid					25,000,000			34,500,000	23,100,000	20,600,000		13,300,000			35,000,000
Goodwill	1,349,456,000	1,321,727,000	1,321,277,000				7,711,000	17,994,000		13,900,000	13,941,000	8,500,000		8,499,000	28,000,000				27,947,000
Intangible assets							8,770,000	13,016,000			5,104,000			5,642,000					14,081,000
Goodwill not deductible for tax purpose								18,000,000		13,900,000		8,500,000			28,000,000
Business Acquisition Cost Of Acquired Entity Transaction Cost						1,700,000
Fair value of inventory charges associated with acquisitions	1,800,000			900,000		1,300,000
Acquisition-related transaction costs	1,400,000	2,700,000
Intangible assets										5,100,000		5,600,000			14,100,000
Aggregate purchase price												18,000,000	1,470,000,000		45,800,000	29,100,000
Assumption of debt												4,700,000
Business combination, working capital adjustments															2,400,000
Contingent consideration value as of opening balance sheet date															8,400,000
Business Combination, Contingent Consideration, Liability															8,400,000
Change in amount of contingent consideration, liability																	1,100,000	3,800,000
Business combination, amount financed with borrowings under the revolving facility															$ 15,000,000