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Long-Term Debt - 2022 Notes Redemption (Details) - USD ($)
$ in Thousands
1 Months Ended 9 Months Ended
Apr. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Debt Instruments      
Repayments of long-term debt   $ 695,751 $ 988,500
Debt extinguishment loss     3,971
2022 Notes      
Debt Instruments      
Redemption rate (as a percent) 100.00%    
Repayments of long-term debt $ 350,000    
Interest paid $ 10,500    
Debt extinguishment loss     $ 4,000