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Commitments and Contingencies (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Mar. 31, 2020
Sep. 30, 2020
Sep. 30, 2019
Other Commitments [Line Items]      
Unemployment benefits, possible liability with a change in control   $ 39,500  
Unemployment benefits, possible liability without a change in control   16,800  
Maximum potential capital contributions   22,500  
Payments to acquire equity method investment   2,500 $ 7,500
WorkLLama      
Other Commitments [Line Items]      
Payments to acquire equity method investment $ 9,000 $ 2,500  
Minimum      
Other Commitments [Line Items]      
Period for providing minimum compensation salary and continuation of certain benefits to executives under employment agreements   6 months  
Employment Agreement, Severance Percentage Of Annual Salary   100.00%  
Employment Agreement, Severance Percentage Of Annual Bonus   50.00%  
Maximum      
Other Commitments [Line Items]      
Period for providing minimum compensation salary and continuation of certain benefits to executives under employment agreements   3 years  
Employment Agreement, Severance Percentage Of Annual Salary   300.00%  
Employment Agreement, Severance Percentage Of Annual Bonus   300.00%