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Goodwill and Intangible Assets - Summary of Estimated Amortization Expense (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]  
2015 $ 523us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths
2016 523us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo
2017 495us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree
2018 459us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour
2019 213us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive
Thereafter 1,232us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive
Total $ 3,445us-gaap_FiniteLivedIntangibleAssetsNet