Acquisitions - Additional Information (Detail) (USD $)	9 Months Ended				9 Months Ended				9 Months Ended	0 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013	Sep. 30, 2014 Trade Names	Sep. 30, 2014 Customer Relationships	Sep. 30, 2014 Patents	Sep. 30, 2014 Favorable Leasehold Interest	Sep. 30, 2014 Order or Production Backlog	Sep. 30, 2014 Noncompete Agreements	Sep. 24, 2013 Longwood Industries Inc	Sep. 03, 2014 C2CE	Jul. 30, 2013 Turbonetics	Jan. 31, 2013 Napier	Aug. 21, 2014 Dia-Frag	Jun. 06, 2014 Fandstan Electric Group Ltd
Business Acquisition [Line Items]
Business acquisition, net purchase price, net of cash	$ 299,661,000	$ 222,058,000								$ 83,900,000	$ 25,100,000	$ 23,200,000	$ 112,300,000	$ 70,600,000	$ 199,400,000
Goodwill	864,460,000		786,433,000							28,272,000	14,981,000	11,309,000	67,045,000	32,556,000	49,748,000
Business acquisition, escrow Deposit	41,600,000
Acquired intangible assets	$ 182,600,000			$ 45,900,000	$ 119,500,000	$ 5,200,000	$ 800,000	$ 7,300,000	$ 3,900,000	$ 39,440,000	$ 3,804,000	$ 11,140,000	$ 40,583,000	$ 36,211,000	$ 51,571,000
Average useful life, years					20 years	11 years	5 years		5 years