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Goodwill and Identifiable Assets (Future Amortization Expense) (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]      
Amortization of intangible assets $ 4,869us-gaap_AmortizationOfIntangibleAssets $ 5,538us-gaap_AmortizationOfIntangibleAssets  
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]      
2014 14,464us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear    
2015 16,276us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo    
2016 12,012us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree    
2017 9,616us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour    
2018 7,928us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive    
Thereafter 6,789us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive    
Net Carrying Amount $ 67,085us-gaap_FiniteLivedIntangibleAssetsNet   $ 72,284us-gaap_FiniteLivedIntangibleAssetsNet