Intangibles - Intangible Assets Other Than Goodwill and Trademarks (Detail) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Finite Lived Intangible Assets [Line Items]
Intangible assets, net of accumulated amortization	$ 262,560	$ 273,154
Patents And Other
Finite Lived Intangible Assets [Line Items]
Intangible assets, net of accumulated amortization	9,434	11,403
Intangible assets, accumulated amortization	41,411	40,936
Customer Relationships
Finite Lived Intangible Assets [Line Items]
Intangible assets, net of accumulated amortization	253,126	261,751
Intangible assets, accumulated amortization	$ 78,240	$ 70,493