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Long-Term Debt (Details) $ in Thousands, shares in Millions					1 Months Ended	3 Months Ended					9 Months Ended		12 Months Ended	18 Months Ended
Long-Term Debt (Details) $ in Thousands, shares in Millions	Jun. 01, 2021 USD ($)	Jan. 26, 2021 USD ($)	Jan. 04, 2021 USD ($)	Aug. 21, 2020 USD ($) D	Sep. 02, 2020 USD ($)	Sep. 30, 2023 USD ($)	Mar. 31, 2023 USD ($) shares	Sep. 30, 2022 USD ($)	Jun. 30, 2022 USD ($)	Mar. 31, 2022 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Dec. 31, 2021 USD ($)	Jun. 30, 2023 USD ($)	Oct. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Oct. 18, 2021 USD ($)	Dec. 21, 2016 USD ($)
Long-Term Debt
Total principal						$ 1,617,503					$ 1,617,503					$ 1,195,717
Unamortized debt issuance costs						(10,608)					(10,608)					(12,241)
Long-term debt						1,606,895					1,606,895					1,183,476
Amount of debt repurchased						0					0
Payments of deferred financing costs												$ 814
Aggregate principal amount converted						7	$ 17,172	$ 20,278	$ 3,964
Loss on convertible note equitizations								169			86	169
Gain (loss) on extinguishment of debt repurchased								(30,307)				(45,375)
Credit Facility
Long-Term Debt
Credit facility						474,100					474,100					34,800
Current borrowing base						3,500,000					3,500,000				$ 3,500,000	3,500,000
Lender commitments						1,500,000					$ 1,500,000				$ 1,600,000	1,500,000
Debt maturity threshold days											180 days
Available borrowing capacity						524,000					$ 524,000
Outstanding letters of credit						$ 502,000					$ 502,000					$ 504,000
Weighted average interest rate (as a percent)						7.68%					7.68%					6.42%
Credit Facility \| Minimum
Long-Term Debt
Commitment fees on the unused portion during any period that is not an Investment Grade Period (as a percent)											0.375%
Credit Facility \| Maximum
Long-Term Debt
Commitment fees on the unused portion during any period that is not an Investment Grade Period (as a percent)											0.50%
5.00% senior notes due 2025
Long-Term Debt
Senior notes																		$ 600,000
Interest rate (as a percent)																		5.00%
Issue price as percentage of par value																		100.00%
5.00% senior notes due 2025 \| Debt Repurchase Program
Long-Term Debt
Amount of debt repurchased										$ 585,000
Gain (loss) on extinguishment of debt repurchased										$ (11,000)
Percentage of redeemed amount										101.25%
8.375% Senior Notes Due 2026 and 7.625% Senior Notes Due 2029
Long-Term Debt
Gain (loss) on extinguishment of debt repurchased									$ 4,000
Weighted average percentage premium on repurchases of debt									106.00%
8.375% Senior Notes Due 2026
Long-Term Debt
Senior notes			$ 500,000			$ 96,870					$ 96,870					$ 96,870
Interest rate (as a percent)			8.375%			8.375%					8.375%					8.375%
Issue price as percentage of par value			100.00%
Redemption price of the debt instrument in the event of change of control (as a percent)			101.00%
Amount of debt repurchased								$ 208,000	$ 13,000			208,000				$ 403,000
Weighted average percentage premium on repurchases of debt								109.00%
8.375% Senior Notes Due 2026 \| On or after January 15, 2024
Long-Term Debt
Redemption price			104.188%
8.375% Senior Notes Due 2026 \| On or after January 15, 2026
Long-Term Debt
Redemption price			100.00%
8.375% Senior Notes Due 2026 \| Prior to January 15, 2024
Long-Term Debt
Redemption price			100.00%
7.625% Senior Notes Due 2029
Long-Term Debt
Senior notes		$ 700,000				$ 407,115					$ 407,115					$ 407,115
Interest rate (as a percent)		7.625%				7.625%					7.625%					7.625%
Issue price as percentage of par value		100.00%
Redemption price of the debt instrument in the event of change of control (as a percent)		101.00%
Amount of debt repurchased								$ 118,000	$ 50,000			118,000				$ 293,000	$ 116,000
Weighted average percentage premium on repurchases of debt								107.00%
7.625% Senior Notes Due 2029 \| On or after February 1, 2024
Long-Term Debt
Redemption price		103.813%
7.625% Senior Notes Due 2029 \| On or after February 1, 2027
Long-Term Debt
Redemption price		100.00%
7.625% Senior Notes Due 2029 \| On or before February 1, 2024
Long-Term Debt
Redemption price of the debt instrument if redeemed with the proceeds of certain equity offerings (as a percent)		107.625%
Percentage of the principal amount of the debt instrument which the entity may redeem with the proceeds from certain equity offerings		35.00%
7.625% Senior Notes Due 2029 \| Prior to February 1, 2024
Long-Term Debt
Redemption price		100.00%
5.375% senior notes due 2030
Long-Term Debt
Senior notes	$ 600,000					$ 600,000					$ 600,000					$ 600,000
Interest rate (as a percent)	5.375%					5.375%					5.375%					5.375%
Issue price as percentage of par value	100.00%
Redemption price of the debt instrument in the event of change of control (as a percent)	101.00%
5.375% senior notes due 2030 \| On or after March 1, 2025
Long-Term Debt
Redemption price	102.688%
5.375% senior notes due 2030 \| On or after March 1, 2028
Long-Term Debt
Redemption price	100.00%
5.375% senior notes due 2030 \| On or Before March 1, 2025
Long-Term Debt
Redemption price of the debt instrument if redeemed with the proceeds of certain equity offerings (as a percent)	105.375%
Percentage of the principal amount of the debt instrument which the entity may redeem with the proceeds from certain equity offerings	35.00%
5.375% senior notes due 2030 \| Prior to March 1, 2025
Long-Term Debt
Redemption price	100.00%
4.25% convertible senior notes due 2026
Long-Term Debt
Convertible senior notes				$ 250,000	$ 37,500	$ 39,418					$ 39,418					$ 56,932
Unamortized discount, net				$ (116,000)
Unamortized debt issuance costs						(651)					(651)					(1,159)
Long-term debt						$ 38,767					$ 38,767					$ 55,773
Interest rate (as a percent)				4.25%		4.25%					4.25%					4.25%
Amount of debt converted													$ 206,000	$ 43,000
Issuance of convertible notes					278,500
Payments of deferred financing costs					$ 9,000
Conversion rate				230.2026
If-converted value						$ 230,000					$ 230,000
If-converted value above principal amount						191,000					191,000
Aggregate principal amount converted							9,000					0
Aggregate principal amount induced into conversion							$ 9,000
Shares issued to cover conversions (in shares) \| shares							4
Cash inducement premium							$ 100
Effective interest rate (as a percent)				15.10%									15.10%
Interest expense						$ 500		$ 1,000			$ 2,000	$ 3,000
4.25% convertible senior notes due 2026 \| Convertible debt threshold minimum percentage
Long-Term Debt
Stock price trigger				98.00%
Trading days \| D				5
Consecutive trading days \| D				10
4.25% convertible senior notes due 2026 \| Convertible debt threshold maximum percentage
Long-Term Debt
Stock price trigger				130.00%
Trading days \| D				20
Consecutive trading days \| D				30
4.25% convertible senior notes due 2026 \| Fair value
Long-Term Debt
Fair value				$ 172,000