LOANS AND LEASES, NET - Nonaccrual (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Sep. 30, 2022
Financing Receivable, Nonaccrual [Line Items]
Loans and leases	$ 3,509,730	$ 3,536,305
Nonaccrual Loans
Financing Receivable, Nonaccrual [Line Items]
2023	0	1,228
2022	1,454	1,420
2021	2,587	5,605
2020	3,966	1,002
2019	5,427	3,104
Prior	575	418
Revolving Loans and Leases	11,068	598
Loans and leases	25,077	13,375
Nonaccrual with No ACL	4,711	4,634
Nonaccrual Loans \| National Lending \| Term lending
Financing Receivable, Nonaccrual [Line Items]
2023	0	251
2022	1,454	1,110
2021	1,783	1,964
2020	1,627	989
2019	3,691	3,096
Prior	139	166
Revolving Loans and Leases	0	0
Loans and leases	8,694	7,576
Nonaccrual with No ACL	2,847	2,885
Nonaccrual Loans \| National Lending \| Asset based lending
Financing Receivable, Nonaccrual [Line Items]
2023	0	0
2022	0	0
2021	0	0
2020	0	0
2019	0	0
Prior	0	0
Revolving Loans and Leases	10,363	29
Loans and leases	10,363	29
Nonaccrual with No ACL	0	0
Nonaccrual Loans \| National Lending \| Factoring
Financing Receivable, Nonaccrual [Line Items]
2023	0	0
2022	0	0
2021	0	0
2020	0	0
2019	0	0
Prior	0	0
Revolving Loans and Leases	705	569
Loans and leases	705	569
Nonaccrual with No ACL	0	550
Nonaccrual Loans \| National Lending \| Lease financing
Financing Receivable, Nonaccrual [Line Items]
2023	0	977
2022	0	310
2021	804	2,442
2020	1,188	13
2019	1,736	8
Prior	184	0
Revolving Loans and Leases	0	0
Loans and leases	3,912	3,750
Nonaccrual with No ACL	713	0
Nonaccrual Loans \| National Lending \| SBA/USDA
Financing Receivable, Nonaccrual [Line Items]
2023	0	0
2022	0	0
2021	0	1,199
2020	1,151	0
2019	0	0
Prior	252	252
Revolving Loans and Leases	0	0
Loans and leases	1,403	1,451
Nonaccrual with No ACL	1,151	1,199
Nonaccrual Loans \| National Lending \| Commercial finance
Financing Receivable, Nonaccrual [Line Items]
2023	0	1,228
2022	1,454	1,420
2021	2,587	5,605
2020	3,966	1,002
2019	5,427	3,104
Prior	575	418
Revolving Loans and Leases	11,068	598
Loans and leases	25,077	13,375
Nonaccrual with No ACL	4,711	4,634
90 or More Days Delinquent and Accruing
Financing Receivable, Nonaccrual [Line Items]
2023	0	12,724
2022	8,001	1,593
2021	6,753	861
2020	632	284
2019	254	115
Prior	65	192
Revolving Loans and Leases	69	39
Loans and leases	15,774	15,808
90 or More Days Delinquent and Accruing \| National Lending \| Term lending
Financing Receivable, Nonaccrual [Line Items]
2023	0	207
2022	358	720
2021	6,136	716
2020	472	130
2019	170	70
Prior	44	192
Revolving Loans and Leases	0	0
Loans and leases	7,180	2,035
90 or More Days Delinquent and Accruing \| National Lending \| Asset based lending
Financing Receivable, Nonaccrual [Line Items]
2023		0
2022		0
2021		0
2020		0
2019		0
Prior		0
Revolving Loans and Leases		39
Loans and leases		39
90 or More Days Delinquent and Accruing \| National Lending \| Lease financing
Financing Receivable, Nonaccrual [Line Items]
2023	0	8
2022	2,754	158
2021	75	98
2020	126	131
2019	40	45
Prior	21	0
Revolving Loans and Leases	0	0
Loans and leases	3,016	440
90 or More Days Delinquent and Accruing \| National Lending \| Insurance premium finance
Financing Receivable, Nonaccrual [Line Items]
2023	0	1,513
2022	3,073	110
2021	7	5
2020	5	0
2019	0	0
Prior	0	0
Revolving Loans and Leases	0	0
Loans and leases	3,085	1,628
90 or More Days Delinquent and Accruing \| National Lending \| Commercial finance
Financing Receivable, Nonaccrual [Line Items]
2023	0	1,728
2022	6,185	988
2021	6,218	819
2020	603	261
2019	210	115
Prior	65	192
Revolving Loans and Leases	0	39
Loans and leases	13,281	4,142
90 or More Days Delinquent and Accruing \| National Lending \| Consumer credit products
Financing Receivable, Nonaccrual [Line Items]
2023	0	2,123
2022	1,816	481
2021	535	42
2020	29	23
2019	44	0
Prior	0	0
Revolving Loans and Leases	5	0
Loans and leases	2,429	2,669
90 or More Days Delinquent and Accruing \| National Lending \| Other consumer finance
Financing Receivable, Nonaccrual [Line Items]
2023	0	0
2022	0	124
2021	0	0
2020	0	0
2019	0	0
Prior	0	0
Revolving Loans and Leases	64	0
Loans and leases	64	124
90 or More Days Delinquent and Accruing \| National Lending \| Consumer finance
Financing Receivable, Nonaccrual [Line Items]
2023	0	2,123
2022	1,816	605
2021	535	42
2020	29	23
2019	44	0
Prior	0	0
Revolving Loans and Leases	69	0
Loans and leases	$ 2,493	2,793
90 or More Days Delinquent and Accruing \| National Lending \| Tax services
Financing Receivable, Nonaccrual [Line Items]
2023		8,873
2022		0
2021		0
2020		0
2019		0
Prior		0
Revolving Loans and Leases		0
Loans and leases		$ 8,873

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

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