Intangible Assets - Summary of Intangible Assets (Detail) (Customer Relationships, USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Customer Relationships
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 3,334	$ 3,458
Accumulated Amortization	$ (2,507)	$ (2,250)