INVESTMENT SECURITIES - Securities with unrealized losses (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, Fair Value	$ 2,927,000		$ 2,927,000		$ 12,298,000
Less than 12 months, Unrealized Losses	(50,000)		(50,000)		(239,000)
More than 12 months, Fair Value	39,319,000		39,319,000		37,716,000
More than 12 months, Unrealized Losses	(2,721,000)		(2,721,000)		(1,347,000)
Total Fair Value	42,246,000		42,246,000		50,014,000
Total Unrealized Losses	(2,771,000)		(2,771,000)		(1,586,000)
Sales	0	$ 29,600,000	0	$ 52,100,000
Realized gains		$ 100,000		$ 200,000
U.S. treasury and federal agency
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, Fair Value	249,000		249,000
Less than 12 months, Unrealized Losses	(1,000)		(1,000)
More than 12 months, Fair Value					249,000
More than 12 months, Unrealized Losses					(1,000)
Total Fair Value	249,000		249,000		249,000
Total Unrealized Losses	(1,000)		(1,000)		(1,000)
Association (“GNMA”) mortgage-backed securities – residential
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, Fair Value	1,874,000		1,874,000		11,621,000
Less than 12 months, Unrealized Losses	(38,000)		(38,000)		(237,000)
More than 12 months, Fair Value	31,998,000		31,998,000		27,480,000
More than 12 months, Unrealized Losses	(2,236,000)		(2,236,000)		(955,000)
Total Fair Value	33,872,000		33,872,000		39,101,000
Total Unrealized Losses	(2,274,000)		(2,274,000)		(1,192,000)
Securities issued by U.S. government sponsored entities and agencies
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, Fair Value	741,000		741,000		677,000
Less than 12 months, Unrealized Losses	(9,000)		(9,000)		(2,000)
More than 12 months, Fair Value	7,321,000		7,321,000		7,968,000
More than 12 months, Unrealized Losses	(485,000)		(485,000)		(294,000)
Total Fair Value	8,062,000		8,062,000		8,645,000
Total Unrealized Losses	(494,000)		(494,000)		(296,000)
Corporate collateralized mortgage obligations and mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, Fair Value	63,000		63,000
Less than 12 months, Unrealized Losses	(2,000)		(2,000)
More than 12 months, Fair Value					1,316,000
More than 12 months, Unrealized Losses					(50,000)
Total Fair Value	63,000		63,000		1,316,000
Total Unrealized Losses	$ (2,000)		$ (2,000)		(50,000)
Equity mutual fund
Debt Securities, Available-for-sale [Line Items]
More than 12 months, Fair Value					703,000
More than 12 months, Unrealized Losses					(47,000)
Total Fair Value					703,000
Total Unrealized Losses					$ (47,000)