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Goodwill and Other Intangible Assets - Schedule of Expected Amortization of Intangible Asset (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Goodwill And Intangible Assets Disclosure [Abstract]  
2015 $ 534us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths
2016 534us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo
2017 534us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree
2018 534us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour
2019 534us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive
Thereafter 3,289us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive
Finite-Lived Intangible Assets, Net Carrying Amount $ 5,959us-gaap_FiniteLivedIntangibleAssetsNet