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Goodwill and Intangible Assets - Future Amortization Expense (Details)
$ in Thousands
Sep. 30, 2015
USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]  
Remaining 2015 $ 4,446
2016 15,906
2017 15,274
2018 14,849
2019 $ 14,527