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Debt - Senior unsecured notes (Details) - USD ($)					1 Months Ended
Debt - Senior unsecured notes (Details) - USD ($)	Apr. 29, 2024	Apr. 03, 2024	Mar. 29, 2024	Mar. 28, 2024	Oct. 29, 2025	Sep. 30, 2025
Secured Debt \| Line of Credit
Debt Instrument [Line Items]
Amount of debt outstanding						$ 705,000,000.0
Secured Debt \| Line of Credit \| Subsequent Event
Debt Instrument [Line Items]
Repayments of lines of credit					$ 75,000,000
Amount of debt outstanding					$ 725,000,000
7.875% senior unsecured notes due 2032
Debt Instrument [Line Items]
Interest rate (as a percent)				7.875%
7.875% senior unsecured notes due 2032 \| Senior Notes
Debt Instrument [Line Items]
Face amount of debt				$ 800,000,000
Proceeds from senior notes				$ 784,800,000
10.125% senior unsecured notes due 2028 (January 2028 Notes)
Debt Instrument [Line Items]
Interest rate (as a percent)				10.125%
10.125% senior unsecured notes due 2028 (January 2028 Notes) \| Senior Notes
Debt Instrument [Line Items]
Principal amount tendered or redeemed	$ 269,200,000		$ 431,200,000
Debt redemption price (as a percent)	105.063%
9.750% senior unsecured notes due 2030 (September 2030 Notes)
Debt Instrument [Line Items]
Interest rate (as a percent)				9.75%		9.75%
9.750% senior unsecured notes due 2030 (September 2030 Notes) \| Senior Notes
Debt Instrument [Line Items]
Principal amount tendered or redeemed		$ 197,600,000
7.875% senior unsecured notes due 2032 (March 2032 Notes)
Debt Instrument [Line Items]
Interest rate (as a percent)						7.875%
7.875% senior unsecured notes due 2032 (March 2032 Notes) \| Senior Notes
Debt Instrument [Line Items]
Face amount of debt		$ 200,000,000
Interest rate (as a percent)		7.875%
Proceeds from senior notes		$ 198,700,000
Debt instruments, premium issue rate (as a percent)		100.75%