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Acquisitions - Fair Values of Assets Acquired and Liabilities Assumed at Date of Closing of Aquisition - Aarding (Detail) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Feb. 28, 2013
Business Acquisition [Line Items]        
Goodwill $ 220,163 $ 165,861 $ 129,888  
Aarding Thermal Acoustics B.V. ("Aarding") [Member]        
Business Acquisition [Line Items]        
Current assets       $ 15,062
Property and equipment       959
Goodwill       7,595
Intangible – finite life       13,477
Intangible – indefinite life       2,865
Total assets acquired       39,958
Current liabilities assumed       (8,277)
Deferred income tax liability       (4,086)
Net assets acquired       $ 27,595