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Intangibles and Other Assets - Schedule of Amortization of Intangibles (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Intangibles And Other Assets [Abstract]      
Amortization of intangibles $ 67us-gaap_AmortizationOfIntangibleAssets $ 79us-gaap_AmortizationOfIntangibleAssets $ 49us-gaap_AmortizationOfIntangibleAssets