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Acquisition - Schedule of Estimated Future Amortization Expense for Intangible Assets Acquired (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Finite Lived Intangible Assets Future Amortization Expense [Abstract]  
2015 $ 1,391us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths
2016 2,781us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo
2017 2,090us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree
2018 2,016us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour
2019 438us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive
Thereafter 294us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive
Total future amortization expense $ 9,010us-gaap_FiniteLivedIntangibleAssetsNet