Goodwill and Intangible Assets - Summary of Other Intangible Assets (Detail) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Cost	$ 43,314	$ 43,314
Accumulated Amortization	38,173	31,936
Net Book Value	5,141	11,378
Customer Contracts and Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Cost	25,497	25,497
Accumulated Amortization	24,235	18,616
Net Book Value	1,262	6,881
Patents and Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Cost	10,114	10,114
Accumulated Amortization	7,670	7,337
Net Book Value	2,444	2,777
Trademarks and Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Cost	4,960	4,960
Accumulated Amortization	3,928	3,738
Net Book Value	1,032	1,222
Other [Member]
Finite-Lived Intangible Assets [Line Items]
Cost	2,743	2,743
Accumulated Amortization	2,340	2,245
Net Book Value	$ 403	$ 498