Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Cash flows from operating activities:
Net income before noncontrolling interest	$ 93,431	$ 83,790
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	29,457	34,390
Provision for credit loss	35,942	46,539
Provision for deferred taxes	4,059	2,545
Originations of loans held for sale	(933,786)	(608,628)
Proceeds from sales of loans held for sale	968,998	604,363
Net change in loans held for sale	17,924	652
Net realized (gain) on loans held for sale	(1,370)	(110)
Net realized (gain) on trademarks	0	(10,000)
Net realized (gain) loss on other	(3,165)	272
Impairment on rental equipment	2,013	24
Net change in accrued interest receivable	(7,012)	(4,455)
Net change in other assets	(13,724)	14,050
Net change in accrued expenses and other liabilities	16,729	14,568
Stock compensation	5,904	5,829
Net cash provided by operating activities	215,400	183,829
Cash flows from investing activities:
Proceeds from maturities of and principal collected on securities available for sale	89,476	89,162
Proceeds from maturities of and principal collected on securities held to maturity	1,811	2,822
Purchases of Federal Reserve Bank and Federal Home Loan Bank stock	(183,010)	(120,160)
Redemption of Federal Reserve Bank and Federal Home Loan Bank stock	185,377	119,586
Purchases of loans and leases	(163,091)	(187,834)
Net change in loans and leases	255,909	191,195
Purchases of premises, furniture, and equipment	(3,592)	(3,428)
Purchases of rental equipment	(173,005)	(238,999)
Proceeds from sales of rental equipment	4,951	6,736
Net change in rental equipment	188	(153)
Proceeds from sales of foreclosed real estate and repossessed assets	0	1
Proceeds from sale of trademarks	0	10,000
Proceeds from sale of other assets	4,091	0
Net cash provided by (used in) investing activities	19,105	(131,072)
Cash flows from financing activities:
Net change in deposits	(220,838)	36,659
Net change in short-term borrowings	18,000	43,000
Principal payments on other liabilities	(550)	0
Proceeds from other liabilities	0	(1,026)
Payment of debt issuance costs	0	(511)
Dividends paid on common stock	(2,566)	(2,788)
Issuance of common stock due to restricted stock	3	1
Repurchases of common stock	(56,364)	(82,281)
Investment by (distributions to) noncontrolling interest	79	(1,698)
Net cash (used in) financing activities	(262,236)	(8,644)
Effect of exchange rate changes on cash	39	447
Net change in cash and cash equivalents	(27,692)	44,560
Cash and cash equivalents at beginning of fiscal year	375,580	388,038
Cash and cash equivalents at end of fiscal period	347,888	432,598
Supplemental disclosure of cash flow information:
Interest	12,608	4,273
Income taxes	9,694	7,842
Franchise and other taxes	398	472
Supplemental schedule of non-cash investing activities:
Loans and leases to rental equipment	2,538	1,449
Rental equipment to loan and leases	143,752	202,330
Recognition of operating lease ROU assets, net of measurements	654	0
Joint venture membership interest divestiture	$ 523	$ 0