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Goodwill and Intangible Assets Future Amortization (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]    
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months $ 6,575  
Finite-Lived Intangible Assets, Amortization Expense, Year Two 5,791  
Finite-Lived Intangible Assets, Amortization Expense, Year Three 3,021  
Finite-Lived Intangible Assets, Amortization Expense, Year Four 1,921  
Finite-Lived Intangible Assets, Amortization Expense, Year Five 1,292  
Finite-Lived Intangible Assets, Amortization Expense, after Year Five 754  
Finite-Lived Intangible Assets, Net $ 19,354 $ 26,929