LOANS AND LEASES, NET - Nonaccrual (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Sep. 30, 2021
Financing Receivable, Nonaccrual [Line Items]
Loans and leases	$ 3,684,261	$ 3,609,563
Nonaccrual Loans
Financing Receivable, Nonaccrual [Line Items]
2022	0
2021	852
2020	3,771
2019	10,503
2018	1,157
Prior	147
Revolving Loans and Leases	21,330
Loans and leases	37,760
Nonaccrual with No ACL	3,351
Nonaccrual Loans \| National Lending \| Term lending
Financing Receivable, Nonaccrual [Line Items]
2022	0
2021	765
2020	3,106
2019	8,123
2018	611
Prior	127
Revolving Loans and Leases	0
Loans and leases	12,732
Nonaccrual with No ACL	3,025
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	5,995
Loans and leases	5,995
Nonaccrual with No ACL	0
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	15,335
Loans and leases	15,335
Nonaccrual with No ACL	0
Nonaccrual Loans \| National Lending \| Lease financing
Financing Receivable, Nonaccrual [Line Items]
2022	0
2021	87
2020	18
2019	2,380
2018	546
Prior	20
Revolving Loans and Leases	0
Loans and leases	3,051
Nonaccrual with No ACL	0
Nonaccrual Loans \| National Lending \| SBA/USDA
Financing Receivable, Nonaccrual [Line Items]
2022	0
2021	0
2020	647
2019	0
2018	0
Prior	0
Revolving Loans and Leases	0
Loans and leases	647
Nonaccrual with No ACL	326
Nonaccrual Loans \| National Lending \| Commercial finance
Financing Receivable, Nonaccrual [Line Items]
2022	0
2021	852
2020	3,771
2019	10,503
2018	1,157
Prior	147
Revolving Loans and Leases	21,330
Loans and leases	37,760
Nonaccrual with No ACL	3,351
90 or More Days Delinquent and Accruing
Financing Receivable, Nonaccrual [Line Items]
2022	151
2021	2,237
2020	1,326
2019	521
2018	126
Prior	1,069
Revolving Loans and Leases	0
Loans and leases	5,430
90 or More Days Delinquent and Accruing \| National Lending \| Term lending
Financing Receivable, Nonaccrual [Line Items]
2022	0
2021	84
2020	595
2019	0
2018	0
Prior	0
Revolving Loans and Leases	0
Loans and leases	679
90 or More Days Delinquent and Accruing \| National Lending \| Lease financing
Financing Receivable, Nonaccrual [Line Items]
2022	132
2021	973
2020	79
2019	380
2018	126
Prior	93
Revolving Loans and Leases	0
Loans and leases	1,783
90 or More Days Delinquent and Accruing \| National Lending \| Insurance premium finance
Financing Receivable, Nonaccrual [Line Items]
2022	19
2021	702
2020	0
2019	0
2018	0
Prior	0
Revolving Loans and Leases	0
Loans and leases	721
90 or More Days Delinquent and Accruing \| National Lending \| SBA/USDA
Financing Receivable, Nonaccrual [Line Items]
2022	0
2021	0
2020	647
2019	0
2018	0
Prior	66
Revolving Loans and Leases	0
Loans and leases	713
90 or More Days Delinquent and Accruing \| National Lending \| Commercial finance
Financing Receivable, Nonaccrual [Line Items]
2022	151
2021	1,759
2020	1,321
2019	380
2018	126
Prior	159
Revolving Loans and Leases	0
Loans and leases	3,896
90 or More Days Delinquent and Accruing \| National Lending \| Consumer credit products
Financing Receivable, Nonaccrual [Line Items]
2022	0
2021	471
2020	5
2019	141
2018	0
Prior	0
Revolving Loans and Leases	0
Loans and leases	617
90 or More Days Delinquent and Accruing \| National Lending \| Other consumer finance
Financing Receivable, Nonaccrual [Line Items]
2022	0
2021	7
2020	0
2019	0
2018	0
Prior	910
Revolving Loans and Leases	0
Loans and leases	917
90 or More Days Delinquent and Accruing \| National Lending \| Consumer finance
Financing Receivable, Nonaccrual [Line Items]
2022	0
2021	478
2020	5
2019	141
2018	0
Prior	910
Revolving Loans and Leases	0
Loans and leases	$ 1,534

Amount excluding accrued interest, before allowance for credit loss, of financing receivable.

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