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Acquisitions Fair Value Reconciliation (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]        
Assets Impaired $ 8,500   $ 8,500  
Fair value adjustment (1,215) $ (2,100) (2,757) $ (2,100)
Quickthree Technology LLC | Contingent Consideration        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]        
Balance as of January 1, 2018     7,167  
Payment of contingent consideration     (1,610)  
Balance as of September 30, 2018 $ 2,800   $ 2,800