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Debt (Schedule of Obligations Under Debt Arrangements) (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021	Dec. 17, 2020
Debt Instrument [Line Items]
Principal	$ 3,051,543	$ 3,005,743
Unamortized Premium and Debt Issuance Costs	24,740	26,238
Net Value	3,026,803	2,979,505
Credit Facility | Revolving Credit Facility | Revolving Loan
Debt Instrument [Line Items]
Principal	94,800	49,000
Unamortized Premium and Debt Issuance Costs	0	0
Net Value	94,800	49,000
Unamortized debt issuance costs	$ 4,200	$ 4,700
Senior Notes | 5.625% senior unsecured notes due 2024
Debt Instrument [Line Items]
Interest rate	562.50%	562.50%
Principal	$ 341,135	$ 341,135
Unamortized Premium and Debt Issuance Costs	1,892	2,106
Net Value	$ 339,243	$ 339,029
Senior Notes | 6.500% senior unsecured notes due 2025
Debt Instrument [Line Items]
Interest rate	650.00%	650.00%
Principal	$ 534,834	$ 534,834
Unamortized Premium and Debt Issuance Costs	4,155	4,452
Net Value	$ 530,679	$ 530,382
Senior Notes | 6.250% senior unsecured notes due 2026
Debt Instrument [Line Items]
Interest rate	625.00%	625.00%
Principal	$ 359,799	$ 359,799
Unamortized Premium and Debt Issuance Costs	3,215	3,410
Net Value	$ 356,584	$ 356,389
Senior Notes | 8.000% senior unsecured notes due 2027
Debt Instrument [Line Items]
Interest rate	800.00%	800.00%	8.00%
Principal	$ 1,000,000	$ 1,000,000
Unamortized Premium and Debt Issuance Costs	6,197	6,592
Net Value	$ 993,803	$ 993,408
Senior Notes | 7.750% senior unsecured notes due 2028
Debt Instrument [Line Items]
Interest rate	775.00%	775.00%
Principal	$ 720,975	$ 720,975
Unamortized Premium and Debt Issuance Costs	9,281	9,678
Net Value	$ 711,694	$ 711,297

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Contractual interest rate for funds borrowed, under the debt agreement.

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