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Goodwill and Intangible Assets - Estimated Future Amortization Expense (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]  
Estimated Future Amortization Expense, For the fiscal year ending December 31, 2015 $ 2,569us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear
Estimated Future Amortization Expense, For the fiscal year ending December 31, 2016 2,045us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo
Estimated Future Amortization Expense, For the fiscal year ending December 31, 2017 1,783us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree
Estimated Future Amortization Expense, For the fiscal year ending December 31, 2018 1,582us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour
Estimated Future Amortization Expense, For the fiscal year ending December 31, 2019 1,214us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive
Estimated Future Amortization Expense, Thereafter $ 2,615us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive