LOANS AND LEASES, NET - Impaired Loans (Details) - USD ($) $ in Thousands	12 Months Ended
Sep. 30, 2022	Sep. 30, 2021
Financing Receivable, Impaired [Line Items]
Impaired loans, unpaid balance	$ 7,421	$ 41,030
Average recorded investment	25,940	35,634
National Lending \| Term lending
Financing Receivable, Impaired [Line Items]
Impaired loans, unpaid balance	2,885	20,965
Average recorded investment	11,320	14,623
National Lending \| Asset based lending
Financing Receivable, Impaired [Line Items]
Average recorded investment	3,754	444
National Lending \| Factoring
Financing Receivable, Impaired [Line Items]
Impaired loans, unpaid balance	550	1,268
Average recorded investment	6,344	757
National Lending \| Lease financing
Financing Receivable, Impaired [Line Items]
Impaired loans, unpaid balance	2,787	3,882
Average recorded investment	3,278	3,029
National Lending \| SBA/USDA
Financing Receivable, Impaired [Line Items]
Impaired loans, unpaid balance	1,199	0
Average recorded investment	1,244	550
National Lending \| Commercial finance
Financing Receivable, Impaired [Line Items]
Impaired loans, unpaid balance	7,421	26,115
Average recorded investment	25,940	19,403
Community Banking
Financing Receivable, Impaired [Line Items]
Impaired loans, unpaid balance	0	14,915
Average recorded investment	$ 0	$ 16,231

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Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (c)(1)
-URI https://asc.fasb.org/extlink&oid=123577603&loc=d3e5212-111524

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 17
-URI https://asc.fasb.org/extlink&oid=123577603&loc=d3e5258-111524

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Amount of unpaid principal balance of impaired financing receivables with related allowance for credit losses and without related allowance for credit losses.

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