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Goodwill and Intangible Assets - Future Amortization Expense for Intangible Assets (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Goodwill and Intangible Assets Disclosure [Abstract]    
2015 $ 4,679us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths  
2016 4,354us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo  
2017 4,267us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree  
2018 4,113us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour  
2019 4,063us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive  
Thereafter 61,191us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive  
Total intangibles assets, net carrying amount $ 82,667us-gaap_FiniteLivedIntangibleAssetsNet $ 81,602us-gaap_FiniteLivedIntangibleAssetsNet