Acquisitions and Divestitures (Additional Information - Acquisitions) (Detail) $ in Thousands, € in Millions												3 Months Ended				6 Months Ended	9 Months Ended		12 Months Ended
	Aug. 31, 2016 EUR (€)	Aug. 31, 2016 USD ($)	Jul. 01, 2016 EUR (€)	Jul. 01, 2016 USD ($)	Mar. 16, 2016 USD ($)	Dec. 01, 2015 USD ($)	Jul. 01, 2015 USD ($)	Jun. 10, 2015 EUR (€)	Jun. 10, 2015 USD ($)	May 29, 2015 EUR (€)	May 29, 2015 USD ($)	Sep. 30, 2016 USD ($)	Jun. 30, 2016 USD ($)	Mar. 31, 2016 USD ($)	Sep. 30, 2015 USD ($)	Jun. 30, 2016 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2015 USD ($)	Jun. 30, 2016 USD ($)	Dec. 31, 2015 USD ($)
Business Acquisition [Line Items]
Goodwill		$ 280,204										$ 1,662,892					$ 1,662,892			$ 1,396,529
Intangible assets		215,416
Contingent consideration for acquisition																	0	$ 4,705
Akron Brass
Business Acquisition [Line Items]
Revenues																				120,000
Aggregate purchase price, cash paid					$ 221,400
Goodwill					125,090
Intangible assets					90,400
Indefinite-lived intangible assets acquired					$ 28,800
AWG Fittings GmbH (AWG)
Business Acquisition [Line Items]
Revenues																				40,000
Aggregate purchase price, cash paid			€ 42.8	$ 47,500
Goodwill				22,733
Intangible assets				$ 10,279
SFC-Koenig AG (SFC)
Business Acquisition [Line Items]
Revenues																				$ 63,000
Aggregate purchase price, cash paid	€ 215.9	241,100
Goodwill		132,381
Intangible assets		$ 114,737
Novotema, SpA
Business Acquisition [Line Items]
Aggregate purchase price, cash paid										€ 56.0	$ 61,100
Goodwill											34,300
Intangible assets											$ 20,000
Alfa Valvole, s.r.l
Business Acquisition [Line Items]
Aggregate purchase price, cash paid								€ 99.8	$ 112,600
Goodwill									69,600
Intangible assets									$ 32,100
CIDRA Precision Services, LLC
Business Acquisition [Line Items]
Aggregate purchase price, cash paid							$ 19,500
Goodwill							9,700
Intangible assets							12,300
Consideration transferred							24,200
Eran-out							4,700
CIDRA Precision Services, LLC | Minimum
Business Acquisition [Line Items]
Contingent consideration for acquisition							0
CIDRA Precision Services, LLC | Maximum
Business Acquisition [Line Items]
Contingent consideration for acquisition							$ 5,500
Complementary Product Line
Business Acquisition [Line Items]
Goodwill						$ 700
Consideration transferred						$ 1,900
Selling, general and administrative expenses
Business Acquisition [Line Items]
Acquisition-related transaction costs												1,600			$ 900		4,000	2,100
Selling, general and administrative expenses | CIDRA Precision Services, LLC
Business Acquisition [Line Items]
Change in amount of contingent consideration, liability													$ 1,000	$ 3,700		$ 4,700			$ 4,700
Cost of goods sold
Business Acquisition [Line Items]
Fair value of inventory charges associated with acquisitions												$ 4,600			$ 2,700		$ 10,400	$ 3,400