Intangibles, Net - Schedule of Intangibles, Net (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Cost	$ 157,317	$ 157,057
Accumulated amortization	139,368	136,561
Net	17,949	20,496
Trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Cost	13,540	13,540
Accumulated amortization	7,843	6,934
Net	$ 5,697	6,606
Amortization Method	Straight-line
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Cost	$ 100,997	100,737
Accumulated amortization	90,158	88,564
Net	$ 10,839	12,173
Amortization Method	Accelerated
Patents [Member]
Finite-Lived Intangible Assets [Line Items]
Cost	$ 42,780	42,780
Accumulated amortization	41,367	41,063
Net	$ 1,413	$ 1,717
Amortization Method	Straight-line