CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 79,509	$ 50,281
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization, accretion and other, net	1,613	7,944
Stock-based compensation expense	1,571	1,390
Provision for credit losses	2,500	500
Loss (gain) on sale of investment securities	0	(81)
Gain on bank owned life insurance	(821)	0
Net realized (gain) loss on sales of premises, equipment, and real estate owned	(230)	(355)
Decrease (increase) in accrued interest receivable	(11,444)	(1,115)
Decrease (increase) in federal and state income tax receivable	0	3,877
Decrease (increase) in cash surrender value of bank owned life insurance	(439)	(1,397)
Decrease (increase) in other assets	3,134	(3,422)
Increase (decrease) in federal and state income tax liabilities	16,920	5,090
Increase (decrease) in accrued expenses and other liabilities	(26,213)	(35,871)
Net cash provided by (used in) operating activities	66,100	26,841
CASH FLOWS FROM INVESTING ACTIVITIES
Origination of loans and principal repayments, net	(802,470)	(347,596)
Loans purchased	(77,484)	(413,326)
FHLB & FRB stock purchased	(176,000)	(56,000)
FHLB & FRB stock redeemed	138,000	56,000
Available-for-sale securities purchased	(115,909)	0
Principal payments and maturities of available-for-sale securities	100,340	170,847
Proceeds from sales of available-for-sale securities	0	4,510
Principal payments and maturities of held-to-maturity securities	9,793	38,679
Proceeds from sales of real estate owned	744	2,883
Equity securities purchased	(7,500)	0
Proceeds from sales of premises and equipment	664	2
Premises and equipment purchased and REO improvements	(2,217)	(2,771)
Net cash provided by (used in) investing activities	(932,039)	(546,772)
CASH FLOWS FROM FINANCING ACTIVITIES
Net increase (decrease) in customer accounts	(69,535)	359,934
Proceeds from borrowings	4,400,000	1,400,000
Repayments of borrowings	(3,450,000)	(1,400,000)
Proceeds from stock-based awards	765	828
Dividends paid on common stock	(15,585)	(14,899)
Dividends paid on preferred stock	(3,656)	(3,656)
Treasury stock purchased	(1,728)	(2,973)
Increase (decrease) in advances payments by borrowers for taxes and insurance	(32,425)	(29,465)
Net cash provided by (used in) financing activities	827,836	309,769
Increase (decrease) in cash and cash equivalents	(38,103)	(210,162)
Cash, cash equivalents and restricted cash at beginning of period	683,965	2,090,809
Cash, cash equivalents and restricted cash at end of period	645,862	1,880,647
Non-cash investing activities
Real estate acquired through foreclosure	95	0
Other personal property acquired through foreclosure	0	422
Non-cash financing activities
Preferred stock dividend payable	3,656	3,656
Cash paid (received) during the period for
Interest	48,195	13,275
Income taxes	$ 1,016	$ 0