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Goodwill and Intagible Assets Schedule of Intangible Assets (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Finite-Lived Intangible Assets [Line Items]        
Finite-lived Intangible Assets Acquired     $ 100  
Amortization of Intangible Assets $ 1,046 $ 1,102 2,143 $ 2,170
General and administrative        
Finite-Lived Intangible Assets [Line Items]        
Amortization of Intangible Assets 656 735 1,354 1,448
Cost of service sales        
Finite-Lived Intangible Assets [Line Items]        
Amortization of Intangible Assets $ 390 $ 367 $ 789 $ 722