CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	COMMON STOCK	CAPITAL IN EXCESS OF PAR VALUE	RETAINED EARNINGS	TREASURY SHARES	ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)	DEFERRED COMPENSATION	Series of Individually Immaterial Business Acquisitions	Series of Individually Immaterial Business Acquisitions CAPITAL IN EXCESS OF PAR VALUE
Balance (in shares) at Sep. 30, 2019		82,775,000			35,969,000
Balance at Sep. 30, 2019	$ 477,763	$ 20,694	$ 519,017	$ 568,516	$ (536,308)	$ (65,916)	$ (28,240)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	53,429			53,429
Dividends	(14,427)			(14,427)
Shares withheld on employee taxes on vested equity awards (in shares)					341,000
Shares withheld on employee taxes on vested equity awards	(7,479)				$ (7,479)
Amortization of deferred compensation	2,515						2,515
Common stock issued, net of issuance cost (in shares)			46,900,000		(8,700,000)
Common stock issued, net of issuance costs	177,194				$ 130,294
Equity awards granted, net (in shares)		964,000
Equity awards granted, net		$ 241	$ (241)
ESOP allocation of common stock	1,985		1,985
Stock-based compensation	14,702		14,702					$ 645	$ 645
Other comprehensive loss, net of tax	$ (6,176)					(6,176)
Balance (in shares) at Sep. 30, 2020	56,130,000	83,739,000			27,610,000
Balance at Sep. 30, 2020	$ 700,151	$ 20,935	583,008	607,518	$ (413,493)	(72,092)	(25,725)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	79,211			79,211
Dividends	(16,731)			(16,731)
Shares withheld on employee taxes on vested equity awards (in shares)					152,000
Shares withheld on employee taxes on vested equity awards	(3,357)				$ (3,357)
Amortization of deferred compensation	2,437						2,437
Equity awards granted, net (in shares)		636,000
Equity awards granted, net		$ 159	(159)
ESOP allocation of common stock	2,922		2,922
Stock-based compensation	16,410		16,410
Other comprehensive loss, net of tax	$ 26,115					26,115
Balance (in shares) at Sep. 30, 2021	56,613,000	84,375,000			27,762,000
Balance at Sep. 30, 2021	$ 807,158	$ 21,094	602,181	669,998	$ (416,850)	(45,977)	(23,288)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(191,558)			(191,558)
Dividends	$ (134,380)			(134,380)
Shares withheld on employee taxes on vested equity awards (in shares)	421,860				422,000
Shares withheld on employee taxes on vested equity awards	$ (10,886)				$ (10,886)
Amortization of deferred compensation	10,483						10,483
Equity awards granted, net (in shares)		371,000			(502,000)
Equity awards granted, net	0	$ 93	(7,713)		$ 7,620
ESOP allocation of common stock	15,729		15,729
Stock-based compensation	17,785		17,785
Other comprehensive loss, net of tax	$ (36,761)					(36,761)
Balance (in shares) at Sep. 30, 2022	57,064,000	84,746,000			27,682,000
Balance at Sep. 30, 2022	$ 477,570	$ 21,187	$ 627,982	$ 344,060	$ (420,116)	$ (82,738)	$ (12,805)