LOANS (Schedule of Activity in Allowance for Loan Losses) (Details) - USD ($) $ in Thousands	3 Months Ended												12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Allowance for loan losses
Beginning ALLL				$ 32,208				$ 25,856				$ 19,480	$ 32,208	$ 25,856	$ 19,480
Charge-Offs													(2,021)	(1,690)	(991)
Recoveries													403	542	267
Provision (Credit)	$ 1,650	$ 400	$ 2,200	1,600	$ 1,500	$ 2,100	$ 2,200	1,700	$ 1,950	$ 1,600	$ 2,200	1,350	5,850	7,500	7,100
Ending ALLL	36,440				32,208				25,856				36,440	32,208	25,856
Residential Portfolio Segment [Member] | Junior Lien [Member]
Allowance for loan losses
Beginning ALLL				16				66				109	16	66	109
Charge-Offs													(99)		(13)
Recoveries													26	140	62
Provision (Credit)													69	(190)	(92)
Ending ALLL	12				16				66				12	16	66
Consumer and Other [Member]
Allowance for loan losses
Beginning ALLL				243				112				96	243	112	96
Charge-Offs													(77)	(5)	(41)
Recoveries													4	12	13
Provision (Credit)													179	124	44
Ending ALLL	349				243				112				349	243	112
Primary Residential Mortgages [Member] | Residential Portfolio Segment [Member]
Allowance for loan losses
Beginning ALLL				3,666				2,297				2,923	3,666	2,297	2,923
Charge-Offs													(889)	(1,047)	(638)
Recoveries													173	28	80
Provision (Credit)													1,135	2,388	(68)
Ending ALLL	4,085				3,666				2,297				4,085	3,666	2,297
Home Equity Lines of Credit [Member] | Residential Portfolio Segment [Member]
Allowance for loan losses
Beginning ALLL				233				86				156	233	86	156
Charge-Offs													(23)	(91)	(210)
Recoveries													62	15	2
Provision (Credit)													(51)	223	138
Ending ALLL	221				233				86				221	233	86
Multifamily Property [Member] | Residential Portfolio Segment [Member]
Allowance for loan losses
Beginning ALLL				11,192				11,813				8,983	11,192	11,813	8,983
Charge-Offs
Recoveries
Provision (Credit)													(1,185)	(621)	2,830
Ending ALLL	10,007				11,192				11,813				10,007	11,192	11,813
Owner Occupied Property [Member] | Commercial Real Estate Portfolio Segment [Member]
Allowance for loan losses
Beginning ALLL				1,774				1,679				1,547	1,774	1,679	1,547
Charge-Offs													(734)	(11)
Recoveries														72	11
Provision (Credit)													1,345	34	121
Ending ALLL	2,385				1,774				1,679				2,385	1,774	1,679
Investment Property [Member] | Commercial Real Estate Portfolio Segment [Member]
Allowance for loan losses
Beginning ALLL				10,909				7,590				4,751	10,909	7,590	4,751
Charge-Offs													(123)	(520)	(16)
Recoveries													23	246	18
Provision (Credit)													1,124	3,593	2,837
Ending ALLL	11,933				10,909				7,590				11,933	10,909	7,590
Construction Loans [Member] | Commercial Portfolio Segment [Member]
Allowance for loan losses
Beginning ALLL				9				2				31	9	2	31
Charge-Offs
Recoveries
Provision (Credit)													(8)	7	(29)
Ending ALLL	1				9				2				1	9	2
Commercial and Industrial Sector [Member] | Commercial Portfolio Segment [Member]
Allowance for loan losses
Beginning ALLL				4,164				2,209				880	4,164	2,209	880
Charge-Offs													(76)	(16)	(73)
Recoveries													115	29	81
Provision (Credit)													2,360	1,942	1,321
Ending ALLL	6,563				4,164				2,209				6,563	4,164	2,209
Lease Financing [Member]
Allowance for loan losses
Beginning ALLL
Charge-Offs
Recoveries
Provision (Credit)													884
Ending ALLL	884												884
Agricultural Sector [Member]
Allowance for loan losses
Beginning ALLL				$ 2				$ 2				$ 4	2	2	4
Charge-Offs
Recoveries
Provision (Credit)													(2)		(2)
Ending ALLL					$ 2				$ 2					$ 2	$ 2