Borrowings (Tables)

6 Months Ended

Mar. 31, 2018

Debt Disclosure [Abstract]

Schedule of Long-Term Debt

The Company's debt, net of premiums, discounts, and unamortized debt issuance costs consisted of the following as of March 31, 2018 and September 30, 2017:

(In thousands)	Maturity Date	March 31, 2018			September 30, 2017
5 3/4% Senior Notes	June 2019	$	96,393		$	321,393
8 3/4% Senior Notes	March 2022	500,000			500,000
7 1/4% Senior Notes	February 2023	24,834			199,834
6 3/4% Senior Notes	March 2025	250,000			250,000
5 7/8% Senior Notes	October 2027	400,000			—
Unamortized debt premium, net		3,026			3,413
Unamortized debt issuance costs		(15,905		)	(14,800		)
Total Senior Notes, net		1,258,348			1,259,840
Junior Subordinated Notes (net of unamortized accretion of $37,803 and $38,837, respectively)	July 2036	62,970			61,937
Other Secured Notes payable	Various Dates	4,139			5,635
Total debt, net		$	1,325,457		$	1,327,412

Debt Instrument Redemption

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

Senior Note Description	Issuance Date	Maturity Date	Redemption Terms
5 3/4% Senior Notes	April 2014	June 2019	Callable at any time before March 15, 2019, in whole or in part, at a redemption price equal to 100% of the principal amount, plus a customary make-whole premium; on or after March 15, 2019, callable at 100% of the principal amount plus, in each case, accrued and unpaid interest
8 3/4% Senior Notes	September 2016	March 2022	Callable at any time prior to March 15, 2019, in whole or in part, at a redemption price equal to 100% of the principal amount, plus a customary make-whole premium; on or after March 15, 2019, callable at a redemption price equal to 104.375% of the principal amount; on or after March 15, 2020, callable at a redemption price equal to 102.188% of the principal amount; on or after March 15, 2021, callable at a redemption price equal to 100% of the principal amount plus, in each case, accrued and unpaid interest
7 1/4% Senior Notes	February 2013	February 2023	After February 1, 2018, callable at a redemption price equal to 103.625% of the principal amount; on or after February 1, 2019, callable at a redemption price equal to 102.41% of the principal amount; on or after February 1, 2020, callable at a redemption price equal to 101.208% of the principal amount; on or after February 1, 2021, callable at 100% of the principal amount plus, in each case, accrued and unpaid interest
6 3/4% Senior Notes	March 2017	March 2025	Callable at any time prior to March 15, 2020, in whole or in part, at a redemption price equal to 100% of the principal amount, plus a customary make-whole premium; on or after March 15, 2020, callable at a redemption price equal to 105.063% of the principal amount; on or after March 15, 2021, callable at a redemption price equal to 103.375% of the principal amount; on or after March 15, 2022, callable at a redemption price equal to 101.688% of the principal amount; on or after March 15, 2023, callable at a redemption price equal to 100.000% of the principal amount, plus, in each case, accrued and unpaid interest
5 7/8% 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% 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