Notes and Other Debt - Schedule of Notes and Other Debt (Parenthetical) (Details)	6 Months Ended	12 Months Ended
	Jun. 30, 2021	Dec. 31, 2020	Feb. 02, 2021
Senior Secured Notes - 6.00% Due April15, 2023
Debt Instrument [Line Items]
Debt instrument, maturity date		Apr. 15, 2023
Debt instrument, imputed interest rate		6.49%
Issuance senior notes, stated percentage		6.00%
7.875% Senior Secured Notes
Debt Instrument [Line Items]
Debt instrument, maturity date	Feb. 15, 2025	Feb. 15, 2025
Debt instrument, imputed interest rate	8.38%	8.38%
Issuance senior notes, stated percentage	7.875%	7.875%
Senior Secured Notes - 4.75% Due April15, 2028
Debt Instrument [Line Items]
Debt instrument, maturity date	Apr. 15, 2028	Apr. 15, 2028
Debt instrument, imputed interest rate	5.04%	5.04%
Issuance senior notes, stated percentage	4.75%	4.75%
Senior Unsecured Notes - 8.25% Due October 15, 2023
Debt Instrument [Line Items]
Debt instrument, maturity date	Oct. 15, 2023	Oct. 15, 2023
Debt instrument, imputed interest rate	9.06%	9.06%
Issuance senior notes, stated percentage	8.25%	8.25%	8.25%
Senior Unsecured Notes - 4.00%, Due June 15, 2024
Debt Instrument [Line Items]
Debt instrument, maturity date	Jun. 15, 2024	Jun. 15, 2024
Debt instrument, imputed interest rate	4.77%	4.77%
Issuance senior notes, stated percentage	4.00%	4.00%
Senior Unsecured Notes - 7.125% Due December 15, 2024
Debt Instrument [Line Items]
Debt instrument, maturity date	Dec. 15, 2024	Dec. 15, 2024
Debt instrument, imputed interest rate	7.38%	7.38%
Issuance senior notes, stated percentage	7.125%	7.125%
Senior Unsecured Notes - 6.50%, Due February 15, 2029
Debt Instrument [Line Items]
Debt instrument, maturity date	Feb. 15, 2029
Debt instrument, imputed interest rate	6.83%
Issuance senior notes, stated percentage	6.50%
Senior Secured Revolving Credit Facility
Debt Instrument [Line Items]
Debt instrument, maturity date	Dec. 10, 2024	Dec. 10, 2024