ALLOWANCE FOR LOAN LOSSES AND CREDIT QUALITY - Additional Information (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2019 USD ($) item	Sep. 30, 2018 USD ($) item	Sep. 30, 2019 USD ($) item	Sep. 30, 2018 USD ($) item	Dec. 31, 2018 USD ($)
Troubled Debt Restructuring
Loans Modified In Troubled Debt Restructured Loans	$ 2,700,000		$ 2,700,000		$ 3,700,000
Increase (decrease) in allowance for loan loss		$ (7,000)		$ 255,000
Loan amount of credit quality analysis			250,000
Financing Receivable, Modifications, Recorded Investment	$ 852,000		$ 852,000
All Modifications
Troubled Debt Restructuring
Number of Loans | item	0	2	1	8
Construction and Land Development Loans
Troubled Debt Restructuring
Financing Receivable, Modifications, Recorded Investment	$ 321,000		$ 321,000
Commercial and Industrial Loans
Troubled Debt Restructuring
Increase (decrease) in allowance for loan loss				$ 1,600,000
Number of Loans | item				3
Financing Receivable, Modifications, Recorded Investment		$ 1,400,000		$ 1,400,000
Commercial and Industrial Loans | All Modifications
Troubled Debt Restructuring
Number of Loans | item		2
Commercial Real Estate and Multi-family Residential Loans
Troubled Debt Restructuring
Increase (decrease) in allowance for loan loss				196,000
Financing Receivable, Modifications, Recorded Investment	109,000		109,000
Consumer 1-4 Family Mortgage Loans
Troubled Debt Restructuring
Increase (decrease) in allowance for loan loss				$ 0
Number of Loans | item				3
Financing Receivable, Modifications, Recorded Investment		$ 593,000		$ 593,000
Commercial Real Estate Building
Troubled Debt Restructuring
Financing Receivable, Modifications, Recorded Investment	533,000		533,000
Commercial and Industrial Nonworking Capital
Troubled Debt Restructuring
Financing Receivable, Modifications, Recorded Investment	$ 70,000		$ 70,000
Commercial Real Estates
Troubled Debt Restructuring
Financing Receivable, Modifications, Recorded Investment		$ 1,300,000		$ 1,300,000
Commercial Real Estates | All Modifications
Troubled Debt Restructuring
Number of Loans | item				3