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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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Amount of unamortized loan commitment, origination, and other costs (fees) and purchase premium (discount) on financing receivable recognized as adjustment to yield. Excludes financing receivable covered under loss sharing agreement.

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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	Jun. 30, 2025	Mar. 31, 2025	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	$ 4,745,921		$ 4,071,071
Net deferred loan origination costs (fees)	(2,597)		4,124
Total gross loans and leases	4,743,324		4,075,195
Allowance for credit losses	(105,995)		(71,765)
Total loans and leases, net	4,637,329		4,003,430
National Lending \| Term lending
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	2,003,699		1,554,641
Allowance for credit losses	(29,376)	$ (26,219)	(30,394)	$ (30,659)	$ (28,627)	$ (25,686)
National Lending \| Asset-based lending
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	610,852		471,897
Allowance for credit losses	(7,335)	(2,030)	(1,356)	(1,234)	(1,215)	(2,738)
National Lending \| Factoring
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	241,024		362,295
Allowance for credit losses	(5,377)	(4,934)	(5,757)	(5,812)	(6,814)	(6,566)
National Lending \| Lease financing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	134,214		152,174
Allowance for credit losses	(1,130)	(1,243)	(1,189)	(1,494)	(1,551)	(3,302)
National Lending \| SBA/USDA
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	674,902		568,628
Allowance for credit losses	(5,028)	(4,021)	(3,273)	(2,844)	(2,942)	(2,962)
National Lending \| Other commercial finance
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	153,321		185,964
Allowance for credit losses	(189)	(384)	(607)	(1,399)	(1,720)	(3,089)
National Lending \| Commercial finance
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	3,818,012		3,295,599
Allowance for credit losses	(48,435)	(38,831)	(42,576)	(45,094)	(44,278)	(46,980)
National Lending \| Consumer finance
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	226,380		248,800
Allowance for credit losses	(26,467)	(29,635)	(28,669)	(32,568)	(35,081)	(49,496)
National Lending \| Tax services
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	37,419		8,825
Allowance for credit losses	(30,429)	(33,781)	(2)	(28,653)	(31,528)	(2)
National Lending \| Warehouse finance
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	664,110		517,847
Allowance for credit losses	$ (664)	$ (643)	$ (518)	$ (450)	$ (395)	$ (377)