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Goodwill and Other Intangible Assets - Schedule of Estimated Amortization Expense for Future Years (Detail) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Mar. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]      
2015 remaining $ 8,619us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear    
2016 9,825us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo    
2017 7,547us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree    
2018 5,786us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour    
2019 4,347us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive    
Thereafter 7,614us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive    
Net Carrying Amount $ 43,738us-gaap_FiniteLivedIntangibleAssetsNet $ 38,694us-gaap_FiniteLivedIntangibleAssetsNet $ 24,120us-gaap_FiniteLivedIntangibleAssetsNet