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ALLOWANCE FOR LOAN LOSSES AND CREDIT QUALITY - Loans By Class Modified As Troubled Debt Restructuring (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019 item	Sep. 30, 2018 USD ($) item	Sep. 30, 2019 USD ($) item	Sep. 30, 2018 USD ($) item
Troubled Debt Restructurings Modified During Period [Abstract]
Pre-Modification Outstanding Recorded Investment		$ 824		$ 4,253
Post-Modification Outstanding Recorded Investment		$ 824		$ 4,252
Modified Repayment Terms
Troubled Debt Restructurings Modified During Period [Abstract]
Number of Loans | item		2	1	8
Modified Repayment Terms | Minimum
Troubled Debt Restructurings Modified During Period [Abstract]
Extension period for modified repayment terms	0 months		0 months
Modified Repayment Terms | Maximum
Troubled Debt Restructurings Modified During Period [Abstract]
Extension period for modified repayment terms		6 months
All Modifications
Troubled Debt Restructurings Modified During Period [Abstract]
Number of Loans | item	0	2	1	8
Non-working Capital Loans
Troubled Debt Restructurings Modified During Period [Abstract]
Number of Loans | item		2
Pre-Modification Outstanding Recorded Investment		$ 824
Post-Modification Outstanding Recorded Investment		$ 824
Non-working Capital Loans | Modified Repayment Terms | Minimum
Troubled Debt Restructurings Modified During Period [Abstract]
Extension period for modified repayment terms		0 months
Non-working Capital Loans | Modified Repayment Terms | Maximum
Troubled Debt Restructurings Modified During Period [Abstract]
Extension period for modified repayment terms		6 months
Commercial and Industrial Loans
Troubled Debt Restructurings Modified During Period [Abstract]
Number of Loans | item				3
Pre-Modification Outstanding Recorded Investment			$ 35
Post-Modification Outstanding Recorded Investment			$ 35
Commercial and Industrial Loans | All Modifications
Troubled Debt Restructurings Modified During Period [Abstract]
Number of Loans | item		2
Commercial and Industrial Loans | Working Capital Lines of Credit Loans
Troubled Debt Restructurings Modified During Period [Abstract]
Number of Loans | item				1
Pre-Modification Outstanding Recorded Investment				$ 600
Post-Modification Outstanding Recorded Investment				$ 600
Commercial and Industrial Loans | Working Capital Lines of Credit Loans | Modified Repayment Terms
Troubled Debt Restructurings Modified During Period [Abstract]
Number of Loans | item				1
Extension period for modified repayment terms				0 months
Commercial and Industrial Loans | Non-working Capital Loans | Minimum
Troubled Debt Restructurings Modified During Period [Abstract]
Extension period for modified repayment terms				0 years
Commercial and Industrial Loans | Non-working Capital Loans | Maximum
Troubled Debt Restructurings Modified During Period [Abstract]
Extension period for modified repayment terms				6 months
Commercial and Industrial Loans | Non-working Capital Loans | Modified Repayment Terms
Troubled Debt Restructurings Modified During Period [Abstract]
Number of Loans | item			1	4
Commercial and Industrial Loans | Non-working Capital Loans | Modified Repayment Terms | Minimum
Troubled Debt Restructurings Modified During Period [Abstract]
Extension period for modified repayment terms	0 months
Commercial and Industrial Loans | Non-working Capital Loans | All Modifications
Troubled Debt Restructurings Modified During Period [Abstract]
Number of Loans | item			1	4
Pre-Modification Outstanding Recorded Investment				$ 2,244
Post-Modification Outstanding Recorded Investment				$ 2,244
Commercial and Industrial Loans | Owner Occupied Loans
Troubled Debt Restructurings Modified During Period [Abstract]
Pre-Modification Outstanding Recorded Investment			$ 35
Post-Modification Outstanding Recorded Investment			$ 35
Commercial Real Estate and Multi-family Residential Loans | Construction and Land Development Loans
Troubled Debt Restructurings Modified During Period [Abstract]
Number of Loans | item				1
Pre-Modification Outstanding Recorded Investment				$ 824
Post-Modification Outstanding Recorded Investment				$ 824
Extension period for modified repayment terms				12 months
Commercial Real Estate and Multi-family Residential Loans | Owner Occupied Loans | Modified Repayment Terms
Troubled Debt Restructurings Modified During Period [Abstract]
Number of Loans | item				1
Extension period for modified repayment terms				12 months
Commercial Real Estate and Multi-family Residential Loans | Owner Occupied Loans | All Modifications
Troubled Debt Restructurings Modified During Period [Abstract]
Number of Loans | item				1
Pre-Modification Outstanding Recorded Investment				$ 387
Post-Modification Outstanding Recorded Investment				$ 387
Consumer 1-4 Family Mortgage Loans
Troubled Debt Restructurings Modified During Period [Abstract]
Number of Loans | item				3
Consumer 1-4 Family Mortgage Loans | Closed End First Mortgage Loans | Minimum
Troubled Debt Restructurings Modified During Period [Abstract]
Extension period for modified repayment terms				0 months
Consumer 1-4 Family Mortgage Loans | Closed End First Mortgage Loans | Maximum
Troubled Debt Restructurings Modified During Period [Abstract]
Extension period for modified repayment terms				239 months
Consumer 1-4 Family Mortgage Loans | Closed End First Mortgage Loans | Modified Repayment Terms
Troubled Debt Restructurings Modified During Period [Abstract]
Number of Loans | item				1
Consumer 1-4 Family Mortgage Loans | Closed End First Mortgage Loans | All Modifications
Troubled Debt Restructurings Modified During Period [Abstract]
Number of Loans | item				1
Pre-Modification Outstanding Recorded Investment				$ 198
Post-Modification Outstanding Recorded Investment				$ 197
Extension period for modified repayment terms				239 months

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