LOANS AND ALLOWANCE FOR CREDIT LOSSES (Rollforward of TDRs) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Financing Receivable, Allowance for Credit Losses [Line Items]
TDR beginning balance	$ 18,504	$ 20,923
New TDRs	345	3,747
Disbursements (Payments)	(1,442)	(3,702)
Charge offs	(89)	(988)
Reclassifications/Transfer In/(Out)	(108)	(1,100)
Payoffs	(586)	(376)
TDR ending balance	16,624	18,504
TDR, Related Allowance	805	2,014
Impaired Nonaccrual Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
TDR beginning balance	5,504	5,428
New TDRs	345	2,687
Disbursements (Payments)	(966)	(2,693)
Charge offs		(871)
Reclassifications/Transfer In/(Out)	(1,585)	953
TDR ending balance	3,298	5,504
TDR, Related Allowance	492	1,777
Impaired Nonaccrual Loans [Member] | Residential Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
TDR beginning balance	1,603	445
New TDRs		117
Disbursements (Payments)	(68)	(531)
Charge offs		(23)
Reclassifications/Transfer In/(Out)	(1,535)	1,595
TDR ending balance		1,603
TDR, Related Allowance		156
Impaired Nonaccrual Loans [Member] | Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
TDR beginning balance	83
Disbursements (Payments)		(117)
Charge offs		(258)
Reclassifications/Transfer In/(Out)		458
TDR ending balance	83	83
Impaired Nonaccrual Loans [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
New TDRs	345
Disbursements (Payments)	(8)
TDR ending balance	337
TDR, Related Allowance	33
Impaired Nonaccrual Loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
TDR beginning balance		23
Disbursements (Payments)		(23)
Impaired Nonaccrual Loans [Member] | Construction Loans [Member] | Commercial and Residential Real Estate Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
TDR beginning balance	3,818	4,960
New TDRs		2,570
Disbursements (Payments)	(890)	(2,022)
Charge offs		(590)
Reclassifications/Transfer In/(Out)	(50)	(1,100)
TDR ending balance	2,878	3,818
TDR, Related Allowance	459	1,621
Impaired Accruing Restructured Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
TDR beginning balance	13,000	15,495
New TDRs		1,060
Disbursements (Payments)	(476)	(1,009)
Charge offs	(89)	(117)
Reclassifications/Transfer In/(Out)	1,477	(2,053)
Payoffs	(586)	(376)
TDR ending balance	13,326	13,000
TDR, Related Allowance	313	237
Impaired Accruing Restructured Loans [Member] | Residential Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
TDR beginning balance	3,875	5,686
New TDRs		565
Disbursements (Payments)	(333)	(405)
Charge offs	(89)
Reclassifications/Transfer In/(Out)	1,535	(1,595)
Payoffs	(452)	(376)
TDR ending balance	4,536	3,875
TDR, Related Allowance	239	151
Impaired Accruing Restructured Loans [Member] | Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
TDR beginning balance	4,936	5,740
New TDRs		495
Disbursements (Payments)	(118)	(724)
Charge offs		(117)
Reclassifications/Transfer In/(Out)		(458)
TDR ending balance	4,818	4,936
TDR, Related Allowance	33	68
Impaired Accruing Restructured Loans [Member] | Construction Loans [Member] | Commercial and Residential Real Estate Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
TDR beginning balance	4,189	4,069
Disbursements (Payments)	(25)	120
Reclassifications/Transfer In/(Out)	(58)
Payoffs	(134)
TDR ending balance	3,972	4,189
TDR, Related Allowance	$ 41	$ 18