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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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LOANS AND LEASES, NET - Summary of Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	$ 4,665,006	$ 4,071,071
Net deferred loan origination costs (fees)	(98)	4,124
Total gross loans and leases	4,664,908	4,075,195
Allowance for credit losses	(53,319)	(71,765)	$ (96,855)	$ (63,796)
Total loans and leases, net	4,611,589	4,003,430
Consumer finance
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans and leases	93,300	248,800
Tax services
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans and leases	2,500	8,800
National Lending \| Term lending
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	2,302,540	1,554,641
Allowance for credit losses	(28,345)	(30,394)	(25,686)	(24,621)
National Lending \| Asset-based lending
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	593,265	471,897
Allowance for credit losses	(7,650)	(1,356)	(2,738)	(1,050)
National Lending \| Factoring
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	217,501	362,295
Allowance for credit losses	(4,319)	(5,757)	(6,566)	(6,556)
National Lending \| Lease financing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	149,236	152,174
Allowance for credit losses	(1,040)	(1,189)	(3,302)	(5,902)
National Lending \| SBA/USDA
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	511,488	568,628
Allowance for credit losses	(4,807)	(3,273)	(2,962)	(3,263)
National Lending \| Other commercial finance
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	149,939	185,964
Allowance for credit losses	(90)	(607)	(3,089)	(1,310)
National Lending \| Commercial finance
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	3,923,969	3,295,599
Allowance for credit losses	(46,251)	(42,576)	(46,980)	(44,152)
National Lending \| Consumer finance
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	93,319	248,800
Allowance for credit losses	(6,422)	(28,669)	(49,496)	(19,312)
National Lending \| Tax services
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	2,532	8,825
Allowance for credit losses	0	(2)	(2)	(5)
National Lending \| Warehouse finance
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	645,186	517,847
Allowance for credit losses	$ (646)	$ (518)	$ (377)	$ (327)