Goodwill and Intangible Assets - Summary of Acquisition-Related Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 1,471	$ 1,471
Accumulated Amortization	(608)	(402)
Net Carrying Value	863	1,069
Customer relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,275	1,275
Accumulated Amortization	(412)	(276)
Net Carrying Value	863	999
Non-compete agreements [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	196	196
Accumulated Amortization	(196)	(126)
Net Carrying Value		$ 70