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Debt and Other Obligations - Revolving Credit Facility Due In 2024 (Details) - Revolving Credit Facility
3 Months Ended 12 Months Ended
Mar. 30, 2020
USD ($)
Mar. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2021
USD ($)
Jun. 30, 2020
USD ($)
Line of Credit          
Debt Instrument [Line Items]          
Debt instrument covenant, unrestricted cash and cash equivalents and unused commitments on all revolving credit facilities $ 400,000,000        
Debt instrument covenant, maximum amount of unused commitments from 2020 credit facility $ 200,000,000        
Debt covenant, collateral coverage ratio 1.0        
Revolving credit facility due in 2024 | Line of Credit          
Debt Instrument [Line Items]          
Maximum borrowing capacity $ 110,000,000 $ 240,000,000     $ 180,000,000
Line of credit facility, optional maximum borrowing capacity subject to consent of lenders $ 350,000,000        
Proceeds from lines of credit     $ 180,000,000    
Line of credit facility, remaining borrowing capacity       $ 240,000,000  
Debt term   2 years      
Line of Credit | Maximum | London Interbank Offered Rate (LIBOR)          
Debt Instrument [Line Items]          
Basis spread on variable rate 2.00%        
Line of Credit | Maximum | Certain Market Interest Rates          
Debt Instrument [Line Items]          
Basis spread on variable rate 1.00%        
Line of Credit | Minimum | London Interbank Offered Rate (LIBOR)          
Debt Instrument [Line Items]          
Basis spread on variable rate 0.00%        
Line of Credit | Minimum | Certain Market Interest Rates          
Debt Instrument [Line Items]          
Basis spread on variable rate 0.00%