LOANS (Details 2) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Past Due and Nonaccrual Loans
>90 Days Past Due and Accruing	$ 2,665	$ 1,834
Nonaccrual Including 90 Days or More Past Due	6,071	6,955
Total Past Due and Nonaccrual	13,242	12,403
Current	3,183,935	3,085,850
Total Loans	3,197,177	3,098,253
30-59 Days Past Due
Past Due and Nonaccrual Loans
Total Past Due and Nonaccrual	4,459	2,854
60-89 Days Past Due
Past Due and Nonaccrual Loans
Total Past Due and Nonaccrual	47	760
Commercial Real Estate | Mortgage loans
Past Due and Nonaccrual Loans
Total Loans	1,339,992	1,293,906
Commercial Real Estate | Mortgage loans | Owner occupied
Past Due and Nonaccrual Loans
>90 Days Past Due and Accruing	0	175
Nonaccrual Including 90 Days or More Past Due	2,192	2,205
Total Past Due and Nonaccrual	3,642	2,664
Current	479,553	469,985
Total Loans	483,195	472,649
Commercial Real Estate | Mortgage loans | Owner occupied | 30-59 Days Past Due
Past Due and Nonaccrual Loans
Total Past Due and Nonaccrual	1,450	284
Commercial Real Estate | Mortgage loans | Owner occupied | 60-89 Days Past Due
Past Due and Nonaccrual Loans
Total Past Due and Nonaccrual	0	0
Commercial Real Estate | Mortgage loans | Non-owner occupied
Past Due and Nonaccrual Loans
>90 Days Past Due and Accruing	1,143	1,163
Nonaccrual Including 90 Days or More Past Due	425	0
Total Past Due and Nonaccrual	1,568	1,163
Current	855,229	820,094
Total Loans	856,797	821,257
Commercial Real Estate | Mortgage loans | Non-owner occupied | 30-59 Days Past Due
Past Due and Nonaccrual Loans
Total Past Due and Nonaccrual	0	0
Commercial Real Estate | Mortgage loans | Non-owner occupied | 60-89 Days Past Due
Past Due and Nonaccrual Loans
Total Past Due and Nonaccrual	0	0
Multi-Family | Mortgage loans
Past Due and Nonaccrual Loans
>90 Days Past Due and Accruing	0	0
Nonaccrual Including 90 Days or More Past Due	0	0
Total Past Due and Nonaccrual	0	0
Current	601,747	595,280
Total Loans	601,747	595,280
Multi-Family | Mortgage loans | 30-59 Days Past Due
Past Due and Nonaccrual Loans
Total Past Due and Nonaccrual	0	0
Multi-Family | Mortgage loans | 60-89 Days Past Due
Past Due and Nonaccrual Loans
Total Past Due and Nonaccrual	0	0
Residential Real Estate | Mortgage loans
Past Due and Nonaccrual Loans
Total Loans	493,153	464,264
Residential Real Estate | Mortgage loans | Residential Real Estate Mortgage Loans
Past Due and Nonaccrual Loans
>90 Days Past Due and Accruing	1,017	0
Nonaccrual Including 90 Days or More Past Due	393	401
Total Past Due and Nonaccrual	2,796	2,873
Current	425,160	395,300
Total Loans	427,956	398,173
Residential Real Estate | Mortgage loans | Residential Real Estate Mortgage Loans | 30-59 Days Past Due
Past Due and Nonaccrual Loans
Total Past Due and Nonaccrual	1,386	2,074
Residential Real Estate | Mortgage loans | Residential Real Estate Mortgage Loans | 60-89 Days Past Due
Past Due and Nonaccrual Loans
Total Past Due and Nonaccrual	0	398
Residential Real Estate | Mortgage loans | Home equity
Past Due and Nonaccrual Loans
>90 Days Past Due and Accruing	280	271
Nonaccrual Including 90 Days or More Past Due	261	161
Total Past Due and Nonaccrual	1,116	761
Current	64,081	65,330
Total Loans	65,197	66,091
Residential Real Estate | Mortgage loans | Home equity | 30-59 Days Past Due
Past Due and Nonaccrual Loans
Total Past Due and Nonaccrual	575	329
Residential Real Estate | Mortgage loans | Home equity | 60-89 Days Past Due
Past Due and Nonaccrual Loans
Total Past Due and Nonaccrual	0	0
Commercial, Industrial and Agricultural Loans
Past Due and Nonaccrual Loans
Total Loans	638,711	616,003
Commercial, Industrial and Agricultural Loans | Secured
Past Due and Nonaccrual Loans
>90 Days Past Due and Accruing	225	225
Nonaccrual Including 90 Days or More Past Due	570	570
Total Past Due and Nonaccrual	1,138	949
Current	114,931	111,364
Total Loans	116,069	112,313
Commercial, Industrial and Agricultural Loans | Secured | 30-59 Days Past Due
Past Due and Nonaccrual Loans
Total Past Due and Nonaccrual	343	113
Commercial, Industrial and Agricultural Loans | Secured | 60-89 Days Past Due
Past Due and Nonaccrual Loans
Total Past Due and Nonaccrual	0	41
Commercial, Industrial and Agricultural Loans | Unsecured
Past Due and Nonaccrual Loans
>90 Days Past Due and Accruing	0	0
Nonaccrual Including 90 Days or More Past Due	2,078	3,618
Total Past Due and Nonaccrual	2,813	3,671
Current	519,829	500,019
Total Loans	522,642	503,690
Commercial, Industrial and Agricultural Loans | Unsecured | 30-59 Days Past Due
Past Due and Nonaccrual Loans
Total Past Due and Nonaccrual	688	18
Commercial, Industrial and Agricultural Loans | Unsecured | 60-89 Days Past Due
Past Due and Nonaccrual Loans
Total Past Due and Nonaccrual	47	35
Real Estate Construction and Land Loans
Past Due and Nonaccrual Loans
>90 Days Past Due and Accruing	0	0
Nonaccrual Including 90 Days or More Past Due	152	0
Total Past Due and Nonaccrual	152	281
Current	104,344	107,478
Total Loans	104,496	107,759
Real Estate Construction and Land Loans | 30-59 Days Past Due
Past Due and Nonaccrual Loans
Total Past Due and Nonaccrual	0	0
Real Estate Construction and Land Loans | 60-89 Days Past Due
Past Due and Nonaccrual Loans
Total Past Due and Nonaccrual	0	281
Installment/Consumer Loans
Past Due and Nonaccrual Loans
>90 Days Past Due and Accruing	0	0
Nonaccrual Including 90 Days or More Past Due	0	0
Total Past Due and Nonaccrual	17	41
Current	19,061	21,000
Total Loans	19,078	21,041
Installment/Consumer Loans | 30-59 Days Past Due
Past Due and Nonaccrual Loans
Total Past Due and Nonaccrual	17	36
Installment/Consumer Loans | 60-89 Days Past Due
Past Due and Nonaccrual Loans
Total Past Due and Nonaccrual	$ 0	$ 5