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Goodwill and Identified Intangible Assets - Estimated Future Amortization Expense (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]  
2015 $ 13,036us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear
2016 13,195us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo
2017 13,194us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree
2018 13,032us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour
2019 $ 12,887us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive