COMMITMENTS, CONTINGENCIES AND DERIVATIVES (Schedule of Swapped Variable Cost for Fixed Cost and Terms of Interest Rate Swap Agreements) (Details) - USD ($)		3 Months Ended	9 Months Ended	12 Months Ended
		Sep. 30, 2018	Sep. 30, 2018	Dec. 31, 2017
Derivative [Line Items]
Derivative, fair value		$ 241,000	$ 241,000	$ 142,000
Loss on Cash Flow Hedge Ineffectiveness		0	0	0
Interest rate swaps
Derivative [Line Items]
Notional Amount		43,000,000	43,000,000	43,000,000
Derivative, fair value	[1]	4,361,000	4,361,000	7,571,000
Interest rate swaps | Contract, One
Derivative [Line Items]
Notional Amount		$ 10,000,000	$ 10,000,000
Trade Date			Mar. 18, 2009
Maturity Date			Jun. 30, 2021
Variable Index Received			3 months
Fixed Rate Paid		5.09%	5.09%
Derivative, fair value	[1]	$ 192,000	$ 192,000	527,000
Interest rate swaps | Contract, Two
Derivative [Line Items]
Notional Amount		$ 10,000,000	$ 10,000,000
Trade Date			Jul. 08, 2009
Maturity Date			Jun. 30, 2029
Variable Index Received			3 months
Fixed Rate Paid		5.84%	5.84%
Derivative, fair value	[1]	$ 1,300,000	$ 1,300,000	2,133,000
Interest rate swaps | Contract, Three
Derivative [Line Items]
Notional Amount		$ 10,000,000	$ 10,000,000
Trade Date			May 06, 2010
Maturity Date			Jun. 30, 2030
Variable Index Received			3 months
Fixed Rate Paid		5.71%	5.71%
Derivative, fair value	[1]	$ 1,260,000	$ 1,260,000	2,129,000
Interest rate swaps | Contract, Four
Derivative [Line Items]
Notional Amount		$ 5,000,000	$ 5,000,000
Trade Date			Mar. 14, 2011
Maturity Date			Mar. 30, 2031
Variable Index Received			3 months
Fixed Rate Paid		4.35%	4.35%
Derivative, fair value	[1]	$ 683,000	$ 683,000	1,137,000
Interest rate swaps | Contract, Five
Derivative [Line Items]
Notional Amount		$ 8,000,000	$ 8,000,000
Trade Date			May 04, 2011
Maturity Date			Jul. 07, 2031
Variable Index Received			3 months
Fixed Rate Paid		4.14%	4.14%
Derivative, fair value	[1]	$ 926,000	$ 926,000	1,645,000
Forward-Starting Interest Rate Swap
Derivative [Line Items]
Notional Amount		25,000,000	25,000,000	50,000,000
Derivative, fair value	[2]	65,000	65,000	21,000
Forward-Starting Interest Rate Swap | Contract, One
Derivative [Line Items]
Notional Amount		$ 25,000,000	$ 25,000,000
Trade Date			Feb. 25, 2015
Maturity Date			Feb. 25, 2018
Variable Index Received			1 month
Fixed Rate Paid		1.54%	1.54%
Derivative, fair value	[2]	$ 0	$ 0	20,000
Forward-Starting Interest Rate Swap | Contract, Two
Derivative [Line Items]
Notional Amount		$ 25,000,000	$ 25,000,000
Trade Date			Feb. 25, 2015
Maturity Date			Feb. 25, 2019
Variable Index Received			1 month
Fixed Rate Paid		1.74%	1.74%
Derivative, fair value	[2]	$ 65,000	$ 65,000	$ 1,000

[1] Presented within accrued interest and other liabilities on the consolidated statements of condition.

[2] Presented within accrued interest and other liabilities on the consolidated statements of condition.