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Intangible Assets - Schedule of Amortization Expense of Purchased Intangible Assets Expected to be Recognized (Detail) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]    
2015 (remainder) $ 1,979us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths  
2016 2,637us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo  
2017 2,075us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree  
2018 2,075us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour  
2019 2,075us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive  
Thereafter 8,446us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive  
Net $ 19,287us-gaap_FiniteLivedIntangibleAssetsNet $ 1,124us-gaap_FiniteLivedIntangibleAssetsNet