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Intangible Assets (Future Amortization Expense Related to Intangible Assets with Definite Lives) (Details) - USD ($)
$ in Thousands
Sep. 30, 2015
Dec. 31, 2014
Intangible Assets [Abstract]    
Expected amortization expense October 1, 2015 through December 31, 2015 $ 300  
Expected amortization expense in 2016 1,201  
Expected amortization expense in 2017 924  
Expected amortization expense in 2018 924  
Expected amortization expense in 2019 924  
Expected amortization expense in 2020 and thereafter 3,697  
Total $ 7,970 $ 8,878