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Goodwill and Other Intangible Assets - Amortization Expense Remaining (Details 2) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Amortization expense remaining    
2015 $ 3,949us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths  
2016 3,647us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo  
2017 3,569us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree  
2018 3,484us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour  
2019 3,475us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive  
Thereafter 17,778us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive  
Net Amount $ 35,902us-gaap_FiniteLivedIntangibleAssetsNet $ 40,092us-gaap_FiniteLivedIntangibleAssetsNet