Annual report pursuant to Section 13 and 15(d)

Intangible Assets (Textual) (Detail)

v3.6.0.2
Intangible Assets (Textual) (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Acquired Finite-Lived Intangible Assets [Line Items]      
Costs incurred for development of internal use computer software $ 14,800    
Costs incurred for development of software to be sold 2,200    
Impairment of certain indefinite live intangible assets $ 0 $ 0 $ 598
Patents [Member]      
Acquired Finite-Lived Intangible Assets [Line Items]      
Weighted average life of intangible assets 13 years    
Technology [Member]      
Acquired Finite-Lived Intangible Assets [Line Items]      
Weighted average life of intangible assets 17 years    
Customer related [Member]      
Acquired Finite-Lived Intangible Assets [Line Items]      
Weighted average life of intangible assets 11 years    
Trade names [Member]      
Acquired Finite-Lived Intangible Assets [Line Items]      
Weighted average life of intangible assets 7 years    
Trade names [Member] | Grass Technologies [Member]      
Acquired Finite-Lived Intangible Assets [Line Items]      
Impairment of certain indefinite live intangible assets     $ 600
Internally developed software [Member]      
Acquired Finite-Lived Intangible Assets [Line Items]      
Weighted average life of intangible assets 5 years