Intangibles - Intangible Assets Other Than Goodwill and Trademarks (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Finite Lived Intangible Assets [Line Items]
Intangible assets, net of accumulated amortization	$ 268,305	$ 273,154
Patents And Other
Finite Lived Intangible Assets [Line Items]
Intangible assets, net of accumulated amortization	10,527	11,403
Intangible assets, accumulated amortization	41,128	40,936
Customer Relationships
Finite Lived Intangible Assets [Line Items]
Intangible assets, net of accumulated amortization	257,778	261,751
Intangible assets, accumulated amortization	$ 75,066	$ 70,493