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Intangible Assets (Details 2) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Amortization expense for each of the five years through December 31, 2019 and thereafter    
Nine months ending December 31, 2015 $ 3,099us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear  
2016 4,041us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo  
2017 3,862us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree  
2018 3,861us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour  
2019 3,792us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive  
Thereafter 8,259us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive  
Net Carrying Value $ 26,914us-gaap_FiniteLivedIntangibleAssetsNet $ 27,949us-gaap_FiniteLivedIntangibleAssetsNet