LOANS (Details 1) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Loans by class categorized by internally assigned risk grades
Total loans	$ 3,197,177	$ 3,098,253
Pass
Loans by class categorized by internally assigned risk grades
Total loans	3,106,886	3,012,960
Special Mention
Loans by class categorized by internally assigned risk grades
Total loans	42,363	42,610
Substandard
Loans by class categorized by internally assigned risk grades
Total loans	47,928	42,683
Doubtful
Loans by class categorized by internally assigned risk grades
Total loans	0	0
Commercial real estate | Mortgage loans
Loans by class categorized by internally assigned risk grades
Total loans	1,339,992	1,293,906
Commercial real estate | Mortgage loans | Owner occupied
Loans by class categorized by internally assigned risk grades
Total loans	483,195	472,649
Commercial real estate | Mortgage loans | Owner occupied | Pass
Loans by class categorized by internally assigned risk grades
Total loans	461,080	451,264
Commercial real estate | Mortgage loans | Owner occupied | Special Mention
Loans by class categorized by internally assigned risk grades
Total loans	1,822	1,796
Commercial real estate | Mortgage loans | Owner occupied | Substandard
Loans by class categorized by internally assigned risk grades
Total loans	20,293	19,589
Commercial real estate | Mortgage loans | Owner occupied | Doubtful
Loans by class categorized by internally assigned risk grades
Total loans	0	0
Commercial real estate | Mortgage loans | Non-owner occupied
Loans by class categorized by internally assigned risk grades
Total loans	856,797	821,257
Commercial real estate | Mortgage loans | Non-owner occupied | Pass
Loans by class categorized by internally assigned risk grades
Total loans	844,249	808,612
Commercial real estate | Mortgage loans | Non-owner occupied | Special Mention
Loans by class categorized by internally assigned risk grades
Total loans	8,019	8,056
Commercial real estate | Mortgage loans | Non-owner occupied | Substandard
Loans by class categorized by internally assigned risk grades
Total loans	4,529	4,589
Commercial real estate | Mortgage loans | Non-owner occupied | Doubtful
Loans by class categorized by internally assigned risk grades
Total loans	0	0
Multi-Family | Mortgage loans
Loans by class categorized by internally assigned risk grades
Total loans	601,747	595,280
Multi-Family | Mortgage loans | Pass
Loans by class categorized by internally assigned risk grades
Total loans	601,747	595,280
Multi-Family | Mortgage loans | Special Mention
Loans by class categorized by internally assigned risk grades
Total loans	0	0
Multi-Family | Mortgage loans | Substandard
Loans by class categorized by internally assigned risk grades
Total loans	0	0
Multi-Family | Mortgage loans | Doubtful
Loans by class categorized by internally assigned risk grades
Total loans	0	0
Residential real estate | Mortgage loans
Loans by class categorized by internally assigned risk grades
Total loans	493,153	464,264
Residential real estate | Mortgage loans | Residential mortgage
Loans by class categorized by internally assigned risk grades
Total loans	427,956	398,173
Residential real estate | Mortgage loans | Residential mortgage | Pass
Loans by class categorized by internally assigned risk grades
Total loans	421,767	393,029
Residential real estate | Mortgage loans | Residential mortgage | Special Mention
Loans by class categorized by internally assigned risk grades
Total loans	5,902	4,854
Residential real estate | Mortgage loans | Residential mortgage | Substandard
Loans by class categorized by internally assigned risk grades
Total loans	287	290
Residential real estate | Mortgage loans | Residential mortgage | Doubtful
Loans by class categorized by internally assigned risk grades
Total loans	0	0
Residential real estate | Mortgage loans | Home equity
Loans by class categorized by internally assigned risk grades
Total loans	65,197	66,091
Residential real estate | Mortgage loans | Home equity | Pass
Loans by class categorized by internally assigned risk grades
Total loans	63,161	64,601
Residential real estate | Mortgage loans | Home equity | Special Mention
Loans by class categorized by internally assigned risk grades
Total loans	1,240	698
Residential real estate | Mortgage loans | Home equity | Substandard
Loans by class categorized by internally assigned risk grades
Total loans	796	792
Residential real estate | Mortgage loans | Home equity | Doubtful
Loans by class categorized by internally assigned risk grades
Total loans	0	0
Commercial and Industrial
Loans by class categorized by internally assigned risk grades
Total loans	638,711	616,003
Commercial and Industrial | Secured
Loans by class categorized by internally assigned risk grades
Total loans	116,069	112,313
Commercial and Industrial | Secured | Pass
Loans by class categorized by internally assigned risk grades
Total loans	89,564	86,116
Commercial and Industrial | Secured | Special Mention
Loans by class categorized by internally assigned risk grades
Total loans	12,907	12,637
Commercial and Industrial | Secured | Substandard
Loans by class categorized by internally assigned risk grades
Total loans	13,598	13,560
Commercial and Industrial | Secured | Doubtful
Loans by class categorized by internally assigned risk grades
Total loans	0	0
Commercial and Industrial | Unsecured
Loans by class categorized by internally assigned risk grades
Total loans	522,642	503,690
Commercial and Industrial | Unsecured | Pass
Loans by class categorized by internally assigned risk grades
Total loans	502,073	485,598
Commercial and Industrial | Unsecured | Special Mention
Loans by class categorized by internally assigned risk grades
Total loans	12,459	14,553
Commercial and Industrial | Unsecured | Substandard
Loans by class categorized by internally assigned risk grades
Total loans	8,110	3,539
Commercial and Industrial | Unsecured | Doubtful
Loans by class categorized by internally assigned risk grades
Total loans	0	0
Real estate construction and land loans
Loans by class categorized by internally assigned risk grades
Total loans	104,496	107,759
Real estate construction and land loans | Pass
Loans by class categorized by internally assigned risk grades
Total loans	104,181	107,440
Real estate construction and land loans | Special Mention
Loans by class categorized by internally assigned risk grades
Total loans	0	0
Real estate construction and land loans | Substandard
Loans by class categorized by internally assigned risk grades
Total loans	315	319
Real estate construction and land loans | Doubtful
Loans by class categorized by internally assigned risk grades
Total loans	0	0
Installment/consumer loans
Loans by class categorized by internally assigned risk grades
Total loans	19,078	21,041
Installment/consumer loans | Pass
Loans by class categorized by internally assigned risk grades
Total loans	19,064	21,020
Installment/consumer loans | Special Mention
Loans by class categorized by internally assigned risk grades
Total loans	14	16
Installment/consumer loans | Substandard
Loans by class categorized by internally assigned risk grades
Total loans	0	5
Installment/consumer loans | Doubtful
Loans by class categorized by internally assigned risk grades
Total loans	$ 0	$ 0