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Fair Value Measurements - Schedule of Senior Secured Credit Facility (Details) - Senior Secured Credit Facility - USD ($)
$ in Thousands
Jun. 30, 2021
Dec. 31, 2020
Carrying amounts    
Debt Instrument [Line Items]    
Long term debt, carrying amount $ 222,567 $ 223,487
Level 2 | Estimated fair value    
Debt Instrument [Line Items]    
Long term debt, fair value $ 223,278 $ 223,887