Acquisitions (Additional Information) (Detail) $ in Thousands, € in Millions						3 Months Ended	6 Months Ended	12 Months Ended
	Jun. 10, 2015 EUR (€)	Jun. 10, 2015 USD ($)	May. 29, 2015 EUR (€)	May. 29, 2015 USD ($)	Apr. 28, 2014 USD ($)	Jun. 30, 2015 USD ($)	Jun. 30, 2015 USD ($)	Dec. 31, 2014 USD ($)
Business Acquisition [Line Items]
Goodwill						$ 1,397,660	$ 1,397,660	$ 1,321,277
Novotema, SpA
Business Acquisition [Line Items]
Revenues								33,000
Aggregate purchase price			€ 55.6	$ 60,700
Goodwill				34,900
Intangible assets				20,100
Business Acquisition, Goodwill, Expected Non Tax Deductible Amount				$ 34,900
Alfa Valvole, s.r.l
Business Acquisition [Line Items]
Revenues								$ 33,000
Aggregate purchase price	€ 99.8	$ 112,600
Goodwill		59,600
Intangible assets		44,600
Business Acquisition, Goodwill, Expected Non Tax Deductible Amount		$ 59,600
Aegis Flow Technologies
Business Acquisition [Line Items]
Aggregate purchase price					$ 25,000
Goodwill					7,700
Intangible assets					8,800
Goodwill deductible for tax purposes					$ 7,700
Selling, General And Administrative Expenses
Business Acquisition [Line Items]
Acquisition-related transaction costs						1,000	$ 1,200
Cost Of Goods Sold
Business Acquisition [Line Items]
Fair value of inventory charges associated with acquisitions						$ 700