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Fair Value Measurement - Additional Information (Details) - USD ($)
Sep. 30, 2021
Jan. 28, 2021
Dec. 31, 2020
Mar. 09, 2020
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]        
Fair value assets, transfers between Level 1, Level 2 or Level 3 $ 0   $ 0  
Fair value liabilities, transfers between Level 1, Level 2 or Level 3 0   0  
2029 Notes        
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]        
Debt Instrument face amount 747,500,000 $ 717,500,000    
Estimated fair value of notes payable 647,700,000      
2027 Notes        
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]        
Debt Instrument face amount 550,000,000.0     $ 550,000,000.0
Estimated fair value of notes payable $ 759,800,000   $ 997,900,000