ALLOWANCE FOR CREDIT LOSSES AND CREDIT QUALITY - Amortized Cost Basis Of Collateral Dependent Loans (Details) $ in Thousands	Sep. 30, 2021 USD ($)
Collateral Dependent Loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Real Estate	$ 9,502
General Business  Assets	29,758
Other	1,441
Total	40,701
Commercial and industrial loans | Working capital lines of credit loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Real Estate	0
General Business  Assets	14,181
Other	0
Total	14,181
Commercial and industrial loans | Non-working capital loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Real Estate	1,632
General Business  Assets	13,757
Other	229
Total	15,618
Commercial real estate and multi-family residential loans | Owner occupied loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Real Estate	1,456
General Business  Assets	1,675
Other	1,161
Total	4,292
Commercial real estate and multi-family residential loans | Nonowner occupied loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Real Estate	3,358
General Business  Assets	0
Other	0
Total	3,358
Agri-business and agricultural loans | Loans secured by farmland
Financing Receivable, Allowance for Credit Loss [Line Items]
Real Estate	0
General Business  Assets	145
Other	0
Total	145
Consumer 1-4 family loans | Closed end first mortgage loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Real Estate	3,056
General Business  Assets	0
Other	0
Total	3,056
Consumer 1-4 family loans | Other consumer loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Real Estate	0
General Business  Assets	0
Other	51
Total	$ 51