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Goodwill and Intangible Assets - Estimated Amortization Expense (Detail) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]  
2015 (remaining) $ 5,106us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear
2016 6,701us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths
2017 6,628us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo
2018 6,613us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree
2019 6,582us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour
2020 6,514us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive
Thereafter $ 11,409us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive