Goodwill and Intangible Assets - Intangible Assets - Finite Life (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Cost	$ 71,564	$ 52,507
Accumulated Amortization	13,166	5,896
Patents [Member]
Finite-Lived Intangible Assets [Line Items]
Cost	1,429	1,423
Accumulated Amortization	1,427	1,383
Employment Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Cost	733	733
Accumulated Amortization	461	213
Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Cost	8,677	8,677
Accumulated Amortization	2,412	752
Customer Lists [Member]
Finite-Lived Intangible Assets [Line Items]
Cost	59,017	40,816
Accumulated Amortization	9,094	3,458
Non-compete Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Cost	1,118
Accumulated Amortization	34
Tradename [Member]
Finite-Lived Intangible Assets [Line Items]
Cost	1,390
Accumulated Amortization	23
Foreign Currency Adjustments [Member]
Finite-Lived Intangible Assets [Line Items]
Cost	(800)	858
Accumulated Amortization	$ (285)	$ 90