LOANS AND LEASES, NET - Nonaccrual (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Sep. 30, 2024
Financing Receivable, Nonaccrual [Line Items]
Total gross loans and leases	$ 4,664,908	$ 4,075,195
Consumer finance
Financing Receivable, Nonaccrual [Line Items]
Total gross loans and leases	93,300	248,800
Tax services
Financing Receivable, Nonaccrual [Line Items]
Total gross loans and leases	2,500	8,800
Nonaccrual Loans
Financing Receivable, Nonaccrual [Line Items]
2025	221	9,281
2024	5,988	4,748
2023	31,045	5,435
2022	3,469	1,487
2021	14,420	1,369
Prior	655	4,063
Revolving Loans and Leases	25,618	29
Total gross loans and leases	81,416	26,412
Nonaccrual with No ACL	24,167	3,260
Nonaccrual Loans \| National Lending \| Term lending
Financing Receivable, Nonaccrual [Line Items]
2025	0	9,281
2024	1,383	3,433
2023	23,220	5,369
2022	3,469	1,386
2021	10,887	625
Prior	0	3,368
Revolving Loans and Leases	0	0
Total gross loans and leases	38,959	23,462
Nonaccrual with No ACL	18,072	2,579
Nonaccrual Loans \| National Lending \| Asset-based lending
Financing Receivable, Nonaccrual [Line Items]
2025	0
2024	0
2023	0
2022	0
2021	0
Prior	0
Revolving Loans and Leases	24,327
Total gross loans and leases	24,327
Nonaccrual with No ACL	2,110
Nonaccrual Loans \| National Lending \| Factoring
Financing Receivable, Nonaccrual [Line Items]
2025	0	0
2024	0	0
2023	0	0
2022	0	0
2021	0	0
Prior	0	0
Revolving Loans and Leases	1,291	29
Total gross loans and leases	1,291	29
Nonaccrual with No ACL	0	0
Nonaccrual Loans \| National Lending \| Lease financing
Financing Receivable, Nonaccrual [Line Items]
2025	0	0
2024	0	577
2023	150	11
2022	0	46
2021	3,511	2
Prior	607	110
Revolving Loans and Leases	0	0
Total gross loans and leases	4,268	746
Nonaccrual with No ACL	3,985	0
Nonaccrual Loans \| National Lending \| SBA/USDA
Financing Receivable, Nonaccrual [Line Items]
2025	221	0
2024	4,605	738
2023	7,675	55
2022	0	55
2021	22	742
Prior	48	585
Revolving Loans and Leases	0	0
Total gross loans and leases	12,571	2,175
Nonaccrual with No ACL	0	681
Nonaccrual Loans \| National Lending \| Commercial finance
Financing Receivable, Nonaccrual [Line Items]
2025	221	9,281
2024	5,988	4,748
2023	31,045	5,435
2022	3,469	1,487
2021	14,420	1,369
Prior	655	4,063
Revolving Loans and Leases	25,618	29
Total gross loans and leases	81,416	26,412
Nonaccrual with No ACL	24,167	3,260
90 or More Days Delinquent and Accruing
Financing Receivable, Nonaccrual [Line Items]
2025	4,655	10,500
2024	4,620	2,481
2023	6,013	1,073
2022	848	809
2021	14	275
Prior	1,574	12
Revolving Loans and Leases	0	0
Total gross loans and leases	17,724	15,150
90 or More Days Delinquent and Accruing \| Total loans and leases held for investment
Financing Receivable, Nonaccrual [Line Items]
2025	4,134	9,469
2024	3,785	2,462
2023	5,863	1,073
2022	833	809
2021	14	275
Prior	1,574	12
Revolving Loans and Leases	0	0
Total gross loans and leases	16,203	14,100
90 or More Days Delinquent and Accruing \| National Lending \| Loans held for sale
Financing Receivable, Nonaccrual [Line Items]
2025	521	1,031
2024	835	19
2023	150	0
2022	15	0
2021	0	0
Prior	0	0
Revolving Loans and Leases	0	0
Total gross loans and leases	1,521	1,050
90 or More Days Delinquent and Accruing \| National Lending \| Term lending
Financing Receivable, Nonaccrual [Line Items]
2025	0	0
2024	2,942	621
2023	0	354
2022	0	719
2021	0	217
Prior	1,478	12
Revolving Loans and Leases	0	0
Total gross loans and leases	4,420	1,923
90 or More Days Delinquent and Accruing \| National Lending \| Lease financing
Financing Receivable, Nonaccrual [Line Items]
2025	277	0
2024	0	0
2023	0	0
2022	789	2
2021	1	58
Prior	0	0
Revolving Loans and Leases	0	0
Total gross loans and leases	1,067	60
90 or More Days Delinquent and Accruing \| National Lending \| SBA/USDA
Financing Receivable, Nonaccrual [Line Items]
2025	1,139	0
2024	495	0
2023	5,683	331
2022	0	0
2021	0	0
Prior	96	0
Revolving Loans and Leases	0	0
Total gross loans and leases	7,413	331
90 or More Days Delinquent and Accruing \| National Lending \| Commercial finance
Financing Receivable, Nonaccrual [Line Items]
2025	1,416	0
2024	3,437	621
2023	5,683	685
2022	789	721
2021	1	275
Prior	1,574	12
Revolving Loans and Leases	0	0
Total gross loans and leases	12,900	2,314
90 or More Days Delinquent and Accruing \| National Lending \| Consumer finance
Financing Receivable, Nonaccrual [Line Items]
2025	241	736
2024	348	1,841
2023	180	388
2022	44	88
2021	13	0
Prior	0	0
Revolving Loans and Leases	0	0
Total gross loans and leases	826	3,053
90 or More Days Delinquent and Accruing \| National Lending \| Tax services
Financing Receivable, Nonaccrual [Line Items]
2025	2,477	8,733
2024	0	0
2023	0	0
2022	0	0
2021	0	0
Prior	0	0
Revolving Loans and Leases	0	0
Total gross loans and leases	$ 2,477	$ 8,733

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

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