LOANS AND LEASES, NET - Nonaccrual (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Sep. 30, 2021
Financing Receivable, Nonaccrual [Line Items]
Loans and leases	$ 3,688,566	$ 3,609,563
Nonaccrual Loans
Financing Receivable, Nonaccrual [Line Items]
2022	540
2021	960
2020	3,826
2019	7,883
2018	764
Prior	379
Revolving Loans and Leases	5,251
Loans and leases	19,603
Nonaccrual with No ACL	8,173
Nonaccrual Loans \| National Lending \| Term lending
Financing Receivable, Nonaccrual [Line Items]
2022	540
2021	937
2020	1,291
2019	5,800
2018	300
Prior	97
Revolving Loans and Leases	0
Loans and leases	8,965
Nonaccrual with No ACL	2,922
Nonaccrual Loans \| National Lending \| Asset based lending
Financing Receivable, Nonaccrual [Line Items]
2022	0
2021	0
2020	0
2019	0
2018	0
Prior	0
Revolving Loans and Leases	4,508
Loans and leases	4,508
Nonaccrual with No ACL	4,508
Nonaccrual Loans \| National Lending \| Factoring
Financing Receivable, Nonaccrual [Line Items]
2022	0
2021	0
2020	0
2019	0
2018	0
Prior	0
Revolving Loans and Leases	743
Loans and leases	743
Nonaccrual with No ACL	743
Nonaccrual Loans \| National Lending \| Lease financing
Financing Receivable, Nonaccrual [Line Items]
2022	0
2021	0
2020	1,286
2019	2,083
2018	464
Prior	11
Revolving Loans and Leases	0
Loans and leases	3,844
Nonaccrual with No ACL	0
Nonaccrual Loans \| National Lending \| SBA/USDA
Financing Receivable, Nonaccrual [Line Items]
2022	0
2021	23
2020	1,249
2019	0
2018	0
Prior	271
Revolving Loans and Leases	0
Loans and leases	1,543
Nonaccrual with No ACL	0
Nonaccrual Loans \| National Lending \| Commercial finance
Financing Receivable, Nonaccrual [Line Items]
2022	540
2021	960
2020	3,826
2019	7,883
2018	764
Prior	379
Revolving Loans and Leases	5,251
Loans and leases	19,603
Nonaccrual with No ACL	8,173
90 or More Days Delinquent and Accruing
Financing Receivable, Nonaccrual [Line Items]
2022	1,551
2021	3,754
2020	750
2019	186
2018	208
Prior	571
Revolving Loans and Leases	0
Loans and leases	7,020
90 or More Days Delinquent and Accruing \| National Lending \| Term lending
Financing Receivable, Nonaccrual [Line Items]
2022	285
2021	203
2020	85
2019	1
2018	0
Prior	39
Revolving Loans and Leases	0
Loans and leases	613
90 or More Days Delinquent and Accruing \| National Lending \| Lease financing
Financing Receivable, Nonaccrual [Line Items]
2022	601
2021	573
2020	282
2019	128
2018	204
Prior	0
Revolving Loans and Leases	0
Loans and leases	1,788
90 or More Days Delinquent and Accruing \| National Lending \| Insurance premium finance
Financing Receivable, Nonaccrual [Line Items]
2022	407
2021	391
2020	5
2019	0
2018	0
Prior	0
Revolving Loans and Leases	0
Loans and leases	803
90 or More Days Delinquent and Accruing \| National Lending \| SBA/USDA
Financing Receivable, Nonaccrual [Line Items]
2022	0
2021	0
2020	315
2019	0
2018	0
Prior	0
Revolving Loans and Leases	0
Loans and leases	315
90 or More Days Delinquent and Accruing \| National Lending \| Commercial finance
Financing Receivable, Nonaccrual [Line Items]
2022	1,293
2021	1,167
2020	687
2019	129
2018	204
Prior	39
Revolving Loans and Leases	0
Loans and leases	3,519
90 or More Days Delinquent and Accruing \| National Lending \| Consumer credit products
Financing Receivable, Nonaccrual [Line Items]
2022	258
2021	2,504
2020	63
2019	57
2018	4
Prior	0
Revolving Loans and Leases	0
Loans and leases	2,886
90 or More Days Delinquent and Accruing \| National Lending \| Other consumer finance
Financing Receivable, Nonaccrual [Line Items]
2022	0
2021	83
2020	0
2019	0
2018	0
Prior	532
Revolving Loans and Leases	0
Loans and leases	615
90 or More Days Delinquent and Accruing \| National Lending \| Consumer finance
Financing Receivable, Nonaccrual [Line Items]
2022	258
2021	2,587
2020	63
2019	57
2018	4
Prior	532
Revolving Loans and Leases	0
Loans and leases	$ 3,501

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

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