CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
INTEREST INCOME
Loans receivable	$ 203,946	$ 138,509
Mortgage-backed securities	10,613	4,792
Investment securities and cash equivalents	18,860	7,139
Total Income	233,419	150,440
INTEREST EXPENSE
Customer accounts	31,646	8,461
FHLB advances	18,974	7,843
Total interest expense	50,620	16,304
Net interest income	182,799	134,136
Provision for credit losses	2,500	500
Net interest income after provision (release)	180,299	133,636
OTHER INCOME
Gain (loss) on sale of investment securities	0	81
Loan fee income	$ 1,502	$ 1,921
Revenue, Product and Service [Extensible Enumeration]	Deposit Account [Member]	Deposit Account [Member]
Deposit fee income	$ 6,353	$ 6,443
Other income	6,169	10,236
Total other income	14,024	18,681
OTHER EXPENSE
Compensation and benefits	49,070	47,425
Occupancy	10,102	10,090
FDIC insurance premiums	3,675	3,100
Product delivery	4,621	4,721
Information technology	12,329	11,421
Other expense	12,481	12,856
Total other expense	92,278	89,613
Gain (loss) on real estate owned, net	(112)	562
Income before income taxes	101,933	63,266
Income tax expense	22,424	12,985
Net income	79,509	50,281
Dividends on preferred stock	3,656	3,656
Net income available to common shareholders	$ 75,853	$ 46,625
PER SHARE DATA
Basic earnings per common share (in dollars per share)	$ 1.16	$ 0.72
Diluted earnings per common share (in dollars per share)	1.16	0.71
Dividends paid on common stock (in dollars per share)	$ 0.24	$ 0.23
Basic weighted average number of shares outstanding (in shares)	65,341,974	65,207,837
Diluted weighted average number of shares outstanding (in shares)	65,430,690	65,350,174