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Commitments and Contingencies (Details) - USD ($)
$ in Thousands
6 Months Ended 12 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Dec. 31, 2019
Other Commitments [Line Items]      
Unemployment benefits, possible liability with a change in control $ 39,700    
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 $ 2,500   $ 9,000
Minimum      
Other Commitments [Line Items]      
Period for providing minimum compensation salary and continuation of certain benefits to executives under employment agreements 6 months    
Severance payment as a percentage of annual salary 100.00%    
Severance payment as a 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    
Severance payment as a percentage of annual salary 300.00%    
Severance payment as a percentage of annual bonus 300.00%