LOANS AND LEASES, NET - Nonaccrual (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Sep. 30, 2023
Financing Receivable, Nonaccrual [Line Items]
Total gross loans and leases	$ 4,075,195	$ 4,366,116
Consumer finance
Financing Receivable, Nonaccrual [Line Items]
Total gross loans and leases	248,800	254,400
Tax services
Financing Receivable, Nonaccrual [Line Items]
Total gross loans and leases	8,800	5,200
Nonaccrual Loans
Financing Receivable, Nonaccrual [Line Items]
2024	9,281	865
2023	4,748	5,692
2022	5,435	3,379
2021	1,487	2,825
2020	1,369	3,134
Prior	4,063	2,097
Revolving Loans and Leases	29	19,380
Total gross loans and leases	26,412	37,372
Nonaccrual with No ACL	3,260	1
Nonaccrual Loans \| National Lending \| Term lending
Financing Receivable, Nonaccrual [Line Items]
2024	9,281	865
2023	3,433	4,942
2022	5,369	2,933
2021	1,386	2,165
2020	625	3,134
Prior	3,368	1,285
Revolving Loans and Leases	0	0
Total gross loans and leases	23,462	15,324
Nonaccrual with No ACL	2,579	0
Nonaccrual Loans \| National Lending \| Asset-based lending
Financing Receivable, Nonaccrual [Line Items]
2024		0
2023		0
2022		0
2021		0
2020		0
Prior		0
Revolving Loans and Leases		18,082
Total gross loans and leases		18,082
Nonaccrual with No ACL		0
Nonaccrual Loans \| National Lending \| Factoring
Financing Receivable, Nonaccrual [Line Items]
2024	0	0
2023	0	0
2022	0	0
2021	0	0
2020	0	0
Prior	0	0
Revolving Loans and Leases	29	1,298
Total gross loans and leases	29	1,298
Nonaccrual with No ACL	0	0
Nonaccrual Loans \| National Lending \| Lease financing
Financing Receivable, Nonaccrual [Line Items]
2024	0	0
2023	577	0
2022	11	446
2021	46	660
2020	2	0
Prior	110	560
Revolving Loans and Leases	0	0
Total gross loans and leases	746	1,666
Nonaccrual with No ACL	0	1
Nonaccrual Loans \| National Lending \| SBA/USDA
Financing Receivable, Nonaccrual [Line Items]
2024	0	0
2023	738	750
2022	55	0
2021	55	0
2020	742	0
Prior	585	252
Revolving Loans and Leases	0	0
Total gross loans and leases	2,175	1,002
Nonaccrual with No ACL	681	0
Nonaccrual Loans \| National Lending \| Commercial finance
Financing Receivable, Nonaccrual [Line Items]
2024	9,281	865
2023	4,748	5,692
2022	5,435	3,379
2021	1,487	2,825
2020	1,369	3,134
Prior	4,063	2,097
Revolving Loans and Leases	29	19,380
Total gross loans and leases	26,412	37,372
Nonaccrual with No ACL	3,260	1
90 or More Days Delinquent and Accruing
Financing Receivable, Nonaccrual [Line Items]
2024	10,500	8,034
2023	2,481	3,320
2022	1,073	1,839
2021	809	1,850
2020	275	2,157
Prior	12	1,612
Revolving Loans and Leases	0	28
Total gross loans and leases	15,150	18,840
90 or More Days Delinquent and Accruing \| Total loans and leases held for investment
Financing Receivable, Nonaccrual [Line Items]
2024	9,469	7,728
2023	2,462	3,320
2022	1,073	1,839
2021	809	1,850
2020	275	2,157
Prior	12	1,612
Revolving Loans and Leases	0	28
Total gross loans and leases	14,100	18,534
90 or More Days Delinquent and Accruing \| National Lending \| Loans held for sale
Financing Receivable, Nonaccrual [Line Items]
2024	1,031	306
2023	19	0
2022	0	0
2021	0	0
2020	0	0
Prior	0	0
Revolving Loans and Leases	0	0
Total gross loans and leases	1,050	306
90 or More Days Delinquent and Accruing \| National Lending \| Term lending
Financing Receivable, Nonaccrual [Line Items]
2024	0	1,604
2023	621	1,371
2022	354	500
2021	719	233
2020	217	29
Prior	12	0
Revolving Loans and Leases	0	0
Total gross loans and leases	1,923	3,737
90 or More Days Delinquent and Accruing \| National Lending \| Lease financing
Financing Receivable, Nonaccrual [Line Items]
2024	0	151
2023	0	490
2022	0	979
2021	2	784
2020	58	1,794
Prior	0	44
Revolving Loans and Leases	0	0
Total gross loans and leases	60	4,242
90 or More Days Delinquent and Accruing \| National Lending \| Insurance premium finance
Financing Receivable, Nonaccrual [Line Items]
2024		0
2023		414
2022		114
2021		0
2020		334
Prior		1,477
Revolving Loans and Leases		0
Total gross loans and leases		2,339
90 or More Days Delinquent and Accruing \| National Lending \| SBA/USDA
Financing Receivable, Nonaccrual [Line Items]
2024	0	0
2023	0	0
2022	331	0
2021	0	833
2020	0	0
Prior	0	0
Revolving Loans and Leases	0	0
Total gross loans and leases	331	833
90 or More Days Delinquent and Accruing \| National Lending \| Commercial finance
Financing Receivable, Nonaccrual [Line Items]
2024	0	1,755
2023	621	2,275
2022	685	1,593
2021	721	1,850
2020	275	2,157
Prior	12	1,612
Revolving Loans and Leases	0	0
Total gross loans and leases	2,314	11,242
90 or More Days Delinquent and Accruing \| National Lending \| Other commercial finance
Financing Receivable, Nonaccrual [Line Items]
2024		0
2023		0
2022		0
2021		0
2020		0
Prior		91
Revolving Loans and Leases		0
Total gross loans and leases		91
90 or More Days Delinquent and Accruing \| National Lending \| Consumer finance
Financing Receivable, Nonaccrual [Line Items]
2024	736	891
2023	1,841	1,045
2022	388	246
2021	88	0
2020	0	0
Prior	0	0
Revolving Loans and Leases	0	28
Total gross loans and leases	3,053	2,210
90 or More Days Delinquent and Accruing \| National Lending \| Tax services
Financing Receivable, Nonaccrual [Line Items]
2024	8,733	5,082
2023	0	0
2022	0	0
2021	0	0
2020	0	0
Prior	0	0
Revolving Loans and Leases	0	0
Total gross loans and leases	$ 8,733	$ 5,082

Amortized cost excluding accrued interest, before allowance for credit loss, of financing receivable. Excludes net investment in lease.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
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-URI https://asc.fasb.org/1943274/2147479344/326-20-45-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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