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Debt (Schedule of Obligations Under Debt Arrangements) (Details) - USD ($)	Dec. 31, 2023	Dec. 31, 2022	May 17, 2022	Dec. 17, 2020	Jan. 16, 2020	Dec. 11, 2017	May 15, 2014
Debt Instrument [Line Items]
Principal	$ 3,823,215,000	$ 3,506,284,000
Unamortized Premium, Discount and Debt Issuance Costs	58,751,000	42,130,000
Net Value	3,764,464,000	3,464,154,000
Senior Secured Credit Facility \| Line of Credit \| Revolving Credit Facility
Debt Instrument [Line Items]
Principal	298,300,000	205,400,000
Unamortized Premium, Discount and Debt Issuance Costs	0	0
Net Value	$ 298,300,000	205,400,000
5.625% senior unsecured notes due 2024 \| Senior Unsecured Notes
Debt Instrument [Line Items]
Debt interest rate	5.625%						5.625%
Principal	$ 0	341,135,000
Unamortized Premium, Discount and Debt Issuance Costs	0	1,249,000
Net Value	$ 0	339,886,000
6.500% senior unsecured notes due 2025 \| Senior Unsecured Notes
Debt Instrument [Line Items]
Debt interest rate	6.50%
Principal	$ 0	534,834,000
Unamortized Premium, Discount and Debt Issuance Costs	0	3,265,000
Net Value	$ 0	531,569,000
6.250% senior unsecured notes due 2026 \| Senior Unsecured Notes
Debt Instrument [Line Items]
Debt interest rate	6.25%					6.25%
Principal	$ 339,310,000	339,310,000
Unamortized Premium, Discount and Debt Issuance Costs	1,746,000	2,481,000
Net Value	$ 337,564,000	336,829,000
8.000% senior unsecured notes due 2027 \| Senior Unsecured Notes
Debt Instrument [Line Items]
Debt interest rate	8.00%			8.00%
Principal	$ 981,245,000	981,245,000
Unamortized Premium, Discount and Debt Issuance Costs	3,549,000	4,956,000
Net Value	$ 977,696,000	976,289,000
7.750% senior unsecured notes due 2028 \| Senior Unsecured Notes
Debt Instrument [Line Items]
Debt interest rate	7.75%				7.75%
Principal	$ 679,360,000	679,360,000
Unamortized Premium, Discount and Debt Issuance Costs	6,121,000	7,621,000
Net Value	$ 673,239,000	671,739,000
8.250% senior unsecured notes due 2029 \| Senior Unsecured Notes
Debt Instrument [Line Items]
Debt interest rate	8.25%
Principal	$ 600,000,000	0
Unamortized Premium, Discount and Debt Issuance Costs	17,202,000	0
Net Value	$ 582,798,000	0
8.875% senior unsecured notes due 2030 \| Senior Unsecured Notes
Debt Instrument [Line Items]
Debt interest rate	8.875%
Principal	$ 500,000,000	0
Unamortized Premium, Discount and Debt Issuance Costs	8,342,000	0
Net Value	491,658,000	0
5.875% Alkali senior secured notes due 2042
Debt Instrument [Line Items]
Principal	$ 400,000,000
5.875% Alkali senior secured notes due 2042 \| Senior Unsecured Notes
Debt Instrument [Line Items]
Debt interest rate	5.875%		5.875%
Principal	$ 425,000,000	425,000,000
Unamortized Premium, Discount and Debt Issuance Costs	21,791,000	22,558,000
Net Value	403,209,000	402,442,000
Revolving Loan \| Line of Credit \| Revolving Credit Facility
Debt Instrument [Line Items]
Unamortized debt issuance costs included in other long term assets	$ 5,700,000	$ 2,600,000