LOANS AND ALLOWANCE FOR CREDIT LOSSES ON LOANS (Composition of Loan Portfolio) (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	$ 3,237,046	$ 3,219,822
Total Loans Outstanding	3,237,046	3,219,822	$ 3,157,762
Commercial Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	1,925,893	1,886,059
Commercial real estate - non owner-occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	1,116,617	1,097,975
Total Loans Outstanding	1,116,617	1,097,975
Commercial real estate - owner-occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	273,710	271,495
Total Loans Outstanding	273,710	271,495
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	366,159	381,494
Total Loans Outstanding	366,159	381,494	463,087
SBA PPP Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	169,407	135,095
Total Loans Outstanding	169,407	135,095
Retail Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	1,311,153	1,333,763
Residential Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	1,051,765	1,054,798
Total Loans Outstanding	1,051,765	1,054,798	1,064,212
Home Equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	240,486	258,573
Total Loans Outstanding	240,486	258,573	306,226
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	18,902	20,392
Total Loans Outstanding	$ 18,902	$ 20,392	$ 24,377

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

+ References

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- Definition

Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=121593590&loc=d3e4428-111522

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=121611835&loc=d3e5074-111524

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