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Intangible Assets and Goodwill (Future Amortization Expense) (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Finite lived intangible assets future amortization expense    
Remaining for year ending December 31, 2015 $ 20,228us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear  
Year ending December 31, 2016 21,512us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths  
Year ending December 31, 2017 10,720us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo  
Year ending December 31, 2018 8,124us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree  
Year ending December 31, 2019 5,066us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour  
Thereafter 6,522us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive  
Net Carrying Amount $ 72,172us-gaap_FiniteLivedIntangibleAssetsNet $ 82,173us-gaap_FiniteLivedIntangibleAssetsNet