LOANS (Details 2) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Past Due and Nonaccrual Loans
>90 Days Past Due and Accruing	$ 2,444	$ 1,027
Nonaccrual Including 90 Days or More Past Due	7,451	1,241
Total Past Due and Nonaccrual	13,650	4,424
Current	2,903,613	2,591,781
Total Loans	2,917,263	2,596,205
30-59 Days Past Due
Past Due and Nonaccrual Loans
Total Past Due and Nonaccrual	2,979	2,156
60-89 Days Past Due
Past Due and Nonaccrual Loans
Total Past Due and Nonaccrual	776
Commercial real estate | Mortgage loans
Past Due and Nonaccrual Loans
Total Loans	1,261,369	1,091,752
Commercial real estate | Mortgage loans | Owner occupied
Past Due and Nonaccrual Loans
>90 Days Past Due and Accruing	563	467
Nonaccrual Including 90 Days or More Past Due	145	184
Total Past Due and Nonaccrual	1,188	873
Current	469,988	423,342
Total Loans	471,176	424,215
Commercial real estate | Mortgage loans | Owner occupied | 30-59 Days Past Due
Past Due and Nonaccrual Loans
Total Past Due and Nonaccrual	480	222
Commercial real estate | Mortgage loans | Non-owner occupied
Past Due and Nonaccrual Loans
>90 Days Past Due and Accruing	1,182
Total Past Due and Nonaccrual	2,094
Current	788,099	667,537
Total Loans	790,193	667,537
Commercial real estate | Mortgage loans | Non-owner occupied | 30-59 Days Past Due
Past Due and Nonaccrual Loans
Total Past Due and Nonaccrual	912
Multi-Family | Mortgage loans
Past Due and Nonaccrual Loans
Current	570,181	518,146
Total Loans	570,181	518,146
Residential real estate | Mortgage loans
Past Due and Nonaccrual Loans
Total Loans	400,256	364,884
Residential real estate | Mortgage loans | Residential mortgage
Past Due and Nonaccrual Loans
Nonaccrual Including 90 Days or More Past Due	490	770
Total Past Due and Nonaccrual	2,016	2,002
Current	332,578	297,747
Total Loans	334,594	299,749
Residential real estate | Mortgage loans | Residential mortgage | 30-59 Days Past Due
Past Due and Nonaccrual Loans
Total Past Due and Nonaccrual	1,309	1,232
Residential real estate | Mortgage loans | Residential mortgage | 60-89 Days Past Due
Past Due and Nonaccrual Loans
Total Past Due and Nonaccrual	217
Residential real estate | Mortgage loans | Home equity
Past Due and Nonaccrual Loans
>90 Days Past Due and Accruing	263	238
Nonaccrual Including 90 Days or More Past Due	199	265
Total Past Due and Nonaccrual	607	1,035
Current	65,055	64,100
Total Loans	65,662	65,135
Residential real estate | Mortgage loans | Home equity | 30-59 Days Past Due
Past Due and Nonaccrual Loans
Total Past Due and Nonaccrual	145	532
Commercial and Industrial
Past Due and Nonaccrual Loans
Total Loans	572,393	524,450
Commercial and Industrial | Secured
Past Due and Nonaccrual Loans
>90 Days Past Due and Accruing	436	204
Nonaccrual Including 90 Days or More Past Due	1,568
Total Past Due and Nonaccrual	2,036	231
Current	95,018	109,003
Total Loans	97,054	109,234
Commercial and Industrial | Secured | 30-59 Days Past Due
Past Due and Nonaccrual Loans
Total Past Due and Nonaccrual	32	27
Commercial and Industrial | Unsecured
Past Due and Nonaccrual Loans
>90 Days Past Due and Accruing		118
Nonaccrual Including 90 Days or More Past Due	5,049	22
Total Past Due and Nonaccrual	5,683	255
Current	469,656	414,961
Total Loans	475,339	415,216
Commercial and Industrial | Unsecured | 30-59 Days Past Due
Past Due and Nonaccrual Loans
Total Past Due and Nonaccrual	75	115
Commercial and Industrial | Unsecured | 60-89 Days Past Due
Past Due and Nonaccrual Loans
Total Past Due and Nonaccrual	559
Real estate construction and land loans
Past Due and Nonaccrual Loans
Current	93,393	80,605
Total Loans	93,393	80,605
Installment/consumer loans
Past Due and Nonaccrual Loans
Total Past Due and Nonaccrual	26	28
Current	19,645	16,340
Total Loans	19,671	16,368
Installment/consumer loans | 30-59 Days Past Due
Past Due and Nonaccrual Loans
Total Past Due and Nonaccrual	$ 26	$ 28