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Disposition (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
May 07, 2019
Feb. 28, 2018
Mar. 31, 2018
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Mar. 16, 2015
Business Acquisition [Line Items]              
Gain on sale       $ 5,471 $ 30,954    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]              
Accretion of interest       0 742    
Three Q Digital Inc              
Business Acquisition [Line Items]              
Contingent consideration potential payment             $ 35,000
Contingent consideration | Significant Unobservable Inputs (Level 3) | Three Q Digital Inc              
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]              
Beginning balance at December 31, 2017       33,887      
Accretion of interest       742      
Disposition       (34,629)      
Ending balance at December 31, 2018       $ 0 $ 33,887    
3Q Digital Inc              
Business Acquisition [Line Items]              
Proceeds from sale   $ 5,000          
Additional proceeds for sale of business $ 5,000 $ 5,000          
Percent of total Company revenue (less than)           10.00%  
Gain on sale     $ (31,000)