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Subsequent Events (Tables)
12 Months Ended
Dec. 31, 2020
Subsequent Events [Abstract]  
Senior Secured Leverage Ratio Requirements under 2021 Amendments
Fiscal Quarter EndingSenior Secured Leverage Ratio
December 31, 2020 to June 30, 2021
5.25 to 1.00
September 30, 2021 to March 31, 2022
5.00 to 1.00
June 30, 2022 and thereafter
4.75 to 1.00