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Intangible Assets - Summary of Intangible Assets (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Goodwill and Intangible Assets Disclosure [Abstract]    
Trade name $ 5,700us-gaap_IndefiniteLivedTradeNames $ 5,700us-gaap_IndefiniteLivedTradeNames
Customer relationships 9,611us-gaap_FiniteLivedCustomerRelationshipsGross 9,100us-gaap_FiniteLivedCustomerRelationshipsGross
Intangible Assets, gross 15,311us-gaap_IntangibleAssetsGrossExcludingGoodwill 14,800us-gaap_IntangibleAssetsGrossExcludingGoodwill
Less accumulated amortization (4,975)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization (4,138)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
Intangible Assets, net $ 10,336us-gaap_IntangibleAssetsNetExcludingGoodwill $ 10,662us-gaap_IntangibleAssetsNetExcludingGoodwill
Estimated useful life (In years), Trade name Indefinite  
Estimated useful life (In years), Customer relationships 11 years