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Fair Value Measurements - Schedule of Carrying Values and Estimated Fair Values of Financial Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Feb. 20, 2025	Dec. 31, 2024
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Carrying Amount	$ 902,317		$ 507,938
Unamortized debt issuance costs	(6,081)
Finance lease obligations	4,228		6,282
Fair Value	$ 917,095		$ 489,694
7.25% Senior Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest Rate	7.25%		7.25%
Unamortized debt issuance costs	$ (89)
Fair Value	56,846		$ 54,657
7.25% Senior Notes | Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Carrying Amount	$ 49,934		49,931
5.90% Senior Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest Rate	5.90%	5.90%
Unamortized debt issuance costs	$ (3,740)
Fair Value	415,713		0
5.90% Senior Notes | Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Carrying Amount	$ 399,916		$ 0
6.70% Senior Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest Rate	6.70%		6.70%
Unamortized debt issuance costs	$ (180)
Fair Value	109,411		$ 103,057
6.70% Senior Notes | Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Carrying Amount	$ 99,610		$ 99,590
5.375% Senior Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest Rate	5.375%		5.375%
Unamortized debt issuance costs	$ (2,072)
Fair Value	275,690		$ 273,464
5.375% Senior Notes | Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Carrying Amount	$ 294,710		$ 294,627
3.03% borrowings from FHLBI
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest Rate	3.03%		3.03%
Unamortized debt issuance costs	$ 0
Fair Value	59,435		$ 58,516
3.03% borrowings from FHLBI | Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Carrying Amount	60,000		60,000
Subtotal long-term debt
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value	917,095		489,694
Subtotal long-term debt | Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Carrying Amount	904,170		504,148
Unamortized debt issuance costs | Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Unamortized debt issuance costs	$ (6,081)		$ (2,492)

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