LOANS AND ALLOWANCE FOR LOAN AND LEASE LOSSES - TDR MODIFICATIONS (Details)	12 Months Ended
	Dec. 31, 2015 USD ($) loan	Dec. 31, 2014 USD ($) loan	Dec. 31, 2013 USD ($) loan
Troubled Debt Restructurings disclosures
Number of Loans | loan	347	378	378
Recorded Investment	$ 49,580,000	$ 65,266,000	$ 65,266,000
Specific reserve allocations made to customers	5,000,000	4,000,000
Commitments to lend any additional material amounts to existing TDR relationships	0	0
Specific reserve allocations made to customers whose loan terms were modified in TDRs during period	300,000	1,000,000	1,000,000
Change between the pre and post modification loan	$ 0	$ 0	$ 0
Residential Real Estate
Troubled Debt Restructurings disclosures
Number of Loans | loan	307	324
Recorded Investment	$ 35,209,000	$ 39,132,000
Residential Real Estate | Interest only payments
Troubled Debt Restructurings disclosures
Number of Loans | loan	2	6
Recorded Investment	$ 631,000	$ 607,000
Residential Real Estate | Rate reduction
Troubled Debt Restructurings disclosures
Number of Loans | loan	229	234
Recorded Investment	$ 30,384,000	$ 32,456,000
Residential Real Estate | Principal deferral
Troubled Debt Restructurings disclosures
Number of Loans | loan	16	17
Recorded Investment	$ 1,560,000	$ 1,757,000
Residential Real Estate | Legal modifications
Troubled Debt Restructurings disclosures
Number of Loans | loan	60	67
Recorded Investment	$ 2,634,000	$ 4,312,000
Commercial Real Estate and Commercial Construction
Troubled Debt Restructurings disclosures
Number of Loans | loan	40	54
Recorded Investment	$ 14,371,000	$ 26,134,000
Commercial Real Estate and Commercial Construction | Interest only payments
Troubled Debt Restructurings disclosures
Number of Loans | loan	7
Recorded Investment	$ 1,998,000
Commercial Real Estate and Commercial Construction | Rate reduction
Troubled Debt Restructurings disclosures
Number of Loans | loan	13	12
Recorded Investment	$ 5,748,000	$ 5,096,000
Commercial Real Estate and Commercial Construction | Principal deferral
Troubled Debt Restructurings disclosures
Number of Loans | loan	20	22
Recorded Investment	$ 6,625,000	$ 10,958,000
Commercial Real Estate and Commercial Construction | Legal modifications
Troubled Debt Restructurings disclosures
Number of Loans | loan		20
Recorded Investment		$ 10,080,000
Modified During The Period
Troubled Debt Restructurings disclosures
Number of Loans | loan	44	103	111
Recorded Investment	$ 7,536,000	$ 17,082,000	$ 17,041,000
Modified During The Period | Residential Real Estate
Troubled Debt Restructurings disclosures
Number of Loans | loan	32	77	92
Recorded Investment	$ 3,642,000	$ 7,689,000	$ 9,699,000
Modified During The Period | Residential Real Estate | Interest only payments
Troubled Debt Restructurings disclosures
Number of Loans | loan	1	4	1
Recorded Investment	$ 617,000	$ 389,000	$ 164,000
Modified During The Period | Residential Real Estate | Rate reduction
Troubled Debt Restructurings disclosures
Number of Loans | loan	22	32	43
Recorded Investment	$ 2,667,000	$ 4,047,000	$ 7,540,000
Modified During The Period | Residential Real Estate | Principal deferral
Troubled Debt Restructurings disclosures
Number of Loans | loan	2	6	8
Recorded Investment	$ 43,000	$ 848,000	$ 252,000
Modified During The Period | Residential Real Estate | Legal modifications
Troubled Debt Restructurings disclosures
Number of Loans | loan	7	35	40
Recorded Investment	$ 315,000	$ 2,405,000	$ 1,743,000
Modified During The Period | Commercial Real Estate and Commercial Construction
Troubled Debt Restructurings disclosures
Number of Loans | loan	12	26	19
Recorded Investment	$ 3,894,000	$ 9,393,000	$ 7,342,000
Modified During The Period | Commercial Real Estate and Commercial Construction | Interest only payments
Troubled Debt Restructurings disclosures
Number of Loans | loan	3	6	7
Recorded Investment	$ 465,000	$ 1,570,000	$ 3,238,000
Modified During The Period | Commercial Real Estate and Commercial Construction | Rate reduction
Troubled Debt Restructurings disclosures
Number of Loans | loan	1	11	4
Recorded Investment	$ 815,000	$ 4,995,000	$ 621,000
Modified During The Period | Commercial Real Estate and Commercial Construction | Principal deferral
Troubled Debt Restructurings disclosures
Number of Loans | loan	8	9	8
Recorded Investment	$ 2,614,000	$ 2,828,000	$ 3,315,000
Modified During The Period | Commercial Real Estate and Commercial Construction | Legal modifications
Troubled Debt Restructurings disclosures
Recorded Investment			$ 168,000
Performing Financing Receivable
Troubled Debt Restructurings disclosures
Number of Loans | loan	252	263
Recorded Investment	$ 36,644,000	$ 48,414,000
Percentage of troubled debt restructurings performing as per terms of modifications during the period.	74.00%	74.00%
Percentage of Bank's TDRs that occurred during period, which were performing according to their modified terms	65.00%	68.00%	84.00%
Performing Financing Receivable | Residential Real Estate
Troubled Debt Restructurings disclosures
Number of Loans | loan	224	220
Recorded Investment	$ 27,380,000	$ 29,381,000
Performing Financing Receivable | Residential Real Estate | Interest only payments
Troubled Debt Restructurings disclosures
Number of Loans | loan	2	2
Recorded Investment	$ 631,000	$ 218,000
Performing Financing Receivable | Residential Real Estate | Rate reduction
Troubled Debt Restructurings disclosures
Number of Loans | loan	183	173
Recorded Investment	$ 24,734,000	$ 25,080,000
Performing Financing Receivable | Residential Real Estate | Principal deferral
Troubled Debt Restructurings disclosures
Number of Loans | loan	9	12
Recorded Investment	$ 789,000	$ 1,408,000
Performing Financing Receivable | Residential Real Estate | Legal modifications
Troubled Debt Restructurings disclosures
Number of Loans | loan	30	33
Recorded Investment	$ 1,226,000	$ 2,675,000
Performing Financing Receivable | Commercial Real Estate and Commercial Construction
Troubled Debt Restructurings disclosures
Number of Loans | loan	28	43
Recorded Investment	$ 9,264,000	$ 19,033,000
Performing Financing Receivable | Commercial Real Estate and Commercial Construction | Interest only payments
Troubled Debt Restructurings disclosures
Number of Loans | loan	6
Recorded Investment	$ 1,517,000
Performing Financing Receivable | Commercial Real Estate and Commercial Construction | Rate reduction
Troubled Debt Restructurings disclosures
Number of Loans | loan	10	10
Recorded Investment	$ 5,021,000	$ 4,170,000
Performing Financing Receivable | Commercial Real Estate and Commercial Construction | Principal deferral
Troubled Debt Restructurings disclosures
Number of Loans | loan	12	19
Recorded Investment	$ 2,726,000	$ 9,043,000
Performing Financing Receivable | Commercial Real Estate and Commercial Construction | Legal modifications
Troubled Debt Restructurings disclosures
Number of Loans | loan		14
Recorded Investment		$ 5,820,000
Performing Financing Receivable | Modified During The Period
Troubled Debt Restructurings disclosures
Number of Loans | loan	29	66	78
Recorded Investment	$ 4,914,000	$ 11,638,000	$ 14,340,000
Performing Financing Receivable | Modified During The Period | Residential Real Estate
Troubled Debt Restructurings disclosures
Number of Loans | loan	21	46	62
Recorded Investment	$ 2,918,000	$ 4,940,000	$ 7,493,000
Performing Financing Receivable | Modified During The Period | Residential Real Estate | Interest only payments
Troubled Debt Restructurings disclosures
Number of Loans | loan	1
Recorded Investment	$ 617,000
Performing Financing Receivable | Modified During The Period | Residential Real Estate | Rate reduction
Troubled Debt Restructurings disclosures
Number of Loans | loan	17	21	37
Recorded Investment	$ 2,148,000	$ 2,274,000	$ 6,605,000
Performing Financing Receivable | Modified During The Period | Residential Real Estate | Principal deferral
Troubled Debt Restructurings disclosures
Number of Loans | loan		5	6
Recorded Investment		$ 820,000	$ 95,000
Performing Financing Receivable | Modified During The Period | Residential Real Estate | Legal modifications
Troubled Debt Restructurings disclosures
Number of Loans | loan	3	20	19
Recorded Investment	$ 153,000	$ 1,846,000	$ 793,000
Performing Financing Receivable | Modified During The Period | Commercial Real Estate and Commercial Construction
Troubled Debt Restructurings disclosures
Number of Loans | loan	8	20	16
Recorded Investment	$ 1,996,000	$ 6,698,000	$ 6,847,000
Performing Financing Receivable | Modified During The Period | Commercial Real Estate and Commercial Construction | Interest only payments
Troubled Debt Restructurings disclosures
Number of Loans | loan	3	4	6
Recorded Investment	$ 465,000	$ 1,185,000	$ 3,095,000
Performing Financing Receivable | Modified During The Period | Commercial Real Estate and Commercial Construction | Rate reduction
Troubled Debt Restructurings disclosures
Number of Loans | loan	1	9	3
Recorded Investment	$ 815,000	$ 4,411,000	$ 437,000
Performing Financing Receivable | Modified During The Period | Commercial Real Estate and Commercial Construction | Principal deferral
Troubled Debt Restructurings disclosures
Number of Loans | loan	4	7	7
Recorded Investment	$ 716,000	$ 1,102,000	$ 3,315,000
Nonperforming Financing Receivable
Troubled Debt Restructurings disclosures
Number of Loans | loan	95	115
Recorded Investment	$ 12,936,000	$ 16,852,000
Nonperforming Financing Receivable | Residential Real Estate
Troubled Debt Restructurings disclosures
Number of Loans | loan	83	104
Recorded Investment	$ 7,829,000	$ 9,751,000
Nonperforming Financing Receivable | Residential Real Estate | Interest only payments
Troubled Debt Restructurings disclosures
Number of Loans | loan		4
Recorded Investment		$ 389,000
Nonperforming Financing Receivable | Residential Real Estate | Rate reduction
Troubled Debt Restructurings disclosures
Number of Loans | loan	46	61
Recorded Investment	$ 5,650,000	$ 7,376,000
Nonperforming Financing Receivable | Residential Real Estate | Principal deferral
Troubled Debt Restructurings disclosures
Number of Loans | loan	7	5
Recorded Investment	$ 771,000	$ 349,000
Nonperforming Financing Receivable | Residential Real Estate | Legal modifications
Troubled Debt Restructurings disclosures
Number of Loans | loan	30	34
Recorded Investment	$ 1,408,000	$ 1,637,000
Nonperforming Financing Receivable | Commercial Real Estate and Commercial Construction
Troubled Debt Restructurings disclosures
Number of Loans | loan	12	11
Recorded Investment	$ 5,107,000	$ 7,101,000
Nonperforming Financing Receivable | Commercial Real Estate and Commercial Construction | Interest only payments
Troubled Debt Restructurings disclosures
Number of Loans | loan	1
Recorded Investment	$ 481,000
Nonperforming Financing Receivable | Commercial Real Estate and Commercial Construction | Rate reduction
Troubled Debt Restructurings disclosures
Number of Loans | loan	3	2
Recorded Investment	$ 727,000	$ 926,000
Nonperforming Financing Receivable | Commercial Real Estate and Commercial Construction | Principal deferral
Troubled Debt Restructurings disclosures
Number of Loans | loan	8	3
Recorded Investment	$ 3,899,000	$ 1,915,000
Nonperforming Financing Receivable | Commercial Real Estate and Commercial Construction | Legal modifications
Troubled Debt Restructurings disclosures
Number of Loans | loan		6
Recorded Investment		$ 4,260,000
Nonperforming Financing Receivable | Modified During The Period
Troubled Debt Restructurings disclosures
Number of Loans | loan	15	37	33
Recorded Investment	$ 2,622,000	$ 5,444,000	$ 2,701,000
Nonperforming Financing Receivable | Modified During The Period | Residential Real Estate
Troubled Debt Restructurings disclosures
Number of Loans | loan	11	31	30
Recorded Investment	$ 724,000	$ 2,749,000	$ 2,206,000
Nonperforming Financing Receivable | Modified During The Period | Residential Real Estate | Interest only payments
Troubled Debt Restructurings disclosures
Number of Loans | loan		4	1
Recorded Investment		$ 389,000	$ 164,000
Nonperforming Financing Receivable | Modified During The Period | Residential Real Estate | Rate reduction
Troubled Debt Restructurings disclosures
Number of Loans | loan	5	11	6
Recorded Investment	$ 519,000	$ 1,773,000	$ 935,000
Nonperforming Financing Receivable | Modified During The Period | Residential Real Estate | Principal deferral
Troubled Debt Restructurings disclosures
Number of Loans | loan	2	1	2
Recorded Investment	$ 43,000	$ 28,000	$ 157,000
Nonperforming Financing Receivable | Modified During The Period | Residential Real Estate | Legal modifications
Troubled Debt Restructurings disclosures
Number of Loans | loan	4	15	21
Recorded Investment	$ 162,000	$ 559,000	$ 950,000
Nonperforming Financing Receivable | Modified During The Period | Commercial Real Estate and Commercial Construction
Troubled Debt Restructurings disclosures
Number of Loans | loan	4	6	3
Recorded Investment	$ 1,898,000	$ 2,695,000	$ 495,000
Nonperforming Financing Receivable | Modified During The Period | Commercial Real Estate and Commercial Construction | Interest only payments
Troubled Debt Restructurings disclosures
Number of Loans | loan		2	1
Recorded Investment		$ 385,000	$ 143,000
Nonperforming Financing Receivable | Modified During The Period | Commercial Real Estate and Commercial Construction | Rate reduction
Troubled Debt Restructurings disclosures
Number of Loans | loan		2	1
Recorded Investment		$ 584,000	$ 184,000
Nonperforming Financing Receivable | Modified During The Period | Commercial Real Estate and Commercial Construction | Principal deferral
Troubled Debt Restructurings disclosures
Number of Loans | loan	4	2	1
Recorded Investment	$ 1,898,000	$ 1,726,000
Nonperforming Financing Receivable | Modified During The Period | Commercial Real Estate and Commercial Construction | Legal modifications
Troubled Debt Restructurings disclosures
Recorded Investment			$ 168,000