Borrowings (Tables)

6 Months Ended

Mar. 31, 2026

Debt Disclosure [Abstract]

Schedule of Long-Term Debt

The Company's debt, net of unamortized debt issuance costs consisted of the following as of March 31, 2026 and September 30, 2025:

in thousands	Maturity Date	March 31, 2026		September 30, 2025
5.875% Senior Notes (2027 Notes)	October 2027	$	357,255	$	357,255
7.250% Senior Notes (2029 Notes)	October 2029	350,000		350,000
7.500% Senior Notes (2031 Notes)	March 2031	250,000		250,000
Unamortized debt issuance costs		(5,762)		(6,611)
Total Senior Notes, net		951,493		950,644
Junior Subordinated Notes (net of unamortized accretion of $21,270 and $22,303, respectively)	July 2036	79,503		78,470
Senior Unsecured Revolving Credit Facility	March 2030	195,000		—
Total debt, net		$	1,225,996	$	1,029,114

Schedule of Debt Instrument Redemption

For additional redemption features, refer to the table below that summarizes the redemption terms of our Senior Notes:

Senior Note Description	Issuance Date	Maturity Date	Redemption Terms
5.875% Senior Notes	October 2017	October 2027	Callable at any time prior to October 15, 2022, in whole or in part, at a redemption price equal to 100.000% of the principal amount, plus a customary make-whole premium; on or after October 15, 2022, callable at a redemption price equal to 102.938% of the principal amount; on or after October 15, 2023, callable at a redemption price equal to 101.958% of the principal amount; on or after October 15, 2024, callable at a redemption price equal to 100.979% of the principal amount; on or after October 15, 2025, callable at a redemption price equal to 100.000% of the principal amount, plus, in each case, accrued and unpaid interest.
7.250% Senior Notes	September 2019	October 2029	Callable at any time prior to October 15, 2024, in whole or in part, at a redemption price equal to 100.000% of the principal amount, plus a customary make-whole premium; on or after October 15, 2024, callable at a redemption price equal to 103.625% of the principal amount; on or after October 15, 2025, callable at a redemption price equal to 102.417% of the principal amount; on or after October 15, 2026, callable at a redemption price equal to 101.208% of the principal amount; on or after October 15, 2027, callable at a redemption price equal to 100.000% of the principal amount, plus, in each case, accrued and unpaid interest.
7.500% Senior Notes	March 2024	March 2031	On or prior to March 15, 2027, we may redeem up to 35% of the aggregate principal amount of the 2031 Notes with the net cash proceeds of certain equity offerings at a redemption price equal to 107.500% of the principal amount, plus accrued and unpaid interest to, but excluding, the redemption date, provided at least 65% of the aggregate principal amount of the 2031 Notes originally issued remains outstanding immediately after such redemption.
			Callable at any time prior to March 15, 2027, in whole or in part, at a redemption price equal to 100.000% of the principal amount, plus a customary make-whole premium; on or after March 15, 2027, callable at a redemption price equal to 103.750% of the principal amount; on or after March 15, 2028, callable at a redemption price equal to 101.875% of the principal amount; on or after March 15, 2029, callable at a redemption price equal to 100.000% of the principal amount, plus, in each case, accrued and unpaid interest.