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Subsequent Events (Details) - USD ($)
$ in Thousands
Sep. 30, 2021
Apr. 22, 2021
Dec. 31, 2020
Subsequent Events [Abstract]      
Long-term Debt $ 394,300    
Subsequent Event [Line Items]      
Long-term Debt 394,300    
Senior Secured Notes 6.50 Percent [Member] [Member]      
Subsequent Events [Abstract]      
Long-term Debt 400,000   $ 400,000
Subsequent Event [Line Items]      
Long-term Debt $ 400,000   $ 400,000
Debt Instrument, Interest Rate, Stated Percentage 7.00%    
Senior Secured Notes 7.00 Percent      
Subsequent Events [Abstract]      
Long-term Debt   $ 400,000  
Subsequent Event [Line Items]      
Long-term Debt   $ 400,000  
Debt Instrument, Interest Rate, Stated Percentage   7.00%