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Stock-Based Compensation - Management incentive plan prior to IPO (Details) - USD ($)
$ in Thousands
1 Months Ended 3 Months Ended
Mar. 31, 2019
Mar. 31, 2020
Mar. 31, 2019
Mar. 15, 2019
Management Incentive Plan        
Stock compensation charge   $ 442 $ 22,961  
Increase in additional paid in capital   $ 442 22,961  
2014 Management Incentive Plan        
Management Incentive Plan        
Units outstanding       12,552,825
Stock compensation charge $ 23,000   23,000  
Increase in additional paid in capital     $ 23,000