LOANS (Schedule of Schedule of Risk Category of Loans by Class of Loans) (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Total Loans	$ 3,664,858	$ 3,310,104
Impaired loans	27,419	31,290
Pass [Member]
Total Loans	3,591,195	3,251,155
Special Mention [Member]
Total Loans	29,493	13,151
Substandard [Member]
Total Loans	44,170	45,798
Impaired loans	23,900	27,900
Residential Portfolio Segment [Member] \| Junior Lien [Member]
Total Loans	7,082	9,206
Residential Portfolio Segment [Member] \| Pass [Member] \| Junior Lien [Member]
Total Loans	6,984	8,977
Residential Portfolio Segment [Member] \| Substandard [Member] \| Junior Lien [Member]
Total Loans	98	229
Residential Portfolio Segment [Member] \| Primary Residential Mortgages [Member]
Total Loans	631,632	557,970
Residential Portfolio Segment [Member] \| Primary Residential Mortgages [Member] \| Pass [Member]
Total Loans	618,544	541,359
Residential Portfolio Segment [Member] \| Primary Residential Mortgages [Member] \| Special Mention [Member]
Total Loans	795	660
Residential Portfolio Segment [Member] \| Primary Residential Mortgages [Member] \| Substandard [Member]
Total Loans	12,293	15,951
Residential Portfolio Segment [Member] \| Home Equity Lines of Credit [Member]
Total Loans	68,787	65,683
Residential Portfolio Segment [Member] \| Home Equity Lines of Credit [Member] \| Pass [Member]
Total Loans	68,760	65,630
Residential Portfolio Segment [Member] \| Home Equity Lines of Credit [Member] \| Substandard [Member]
Total Loans	27	53
Residential Portfolio Segment [Member] \| Multifamily Property [Member]
Total Loans	1,441,852	1,459,594
Residential Portfolio Segment [Member] \| Multifamily Property [Member] \| Pass [Member]
Total Loans	1,424,637	1,456,328
Residential Portfolio Segment [Member] \| Multifamily Property [Member] \| Special Mention [Member]
Total Loans	15,381	2,867
Residential Portfolio Segment [Member] \| Multifamily Property [Member] \| Substandard [Member]
Total Loans	1,834	399
Commercial Real Estate Portfolio Segment [Member] \| Owner Occupied Property [Member]
Total Loans	253,605	176,123
Commercial Real Estate Portfolio Segment [Member] \| Owner Occupied Property [Member] \| Pass [Member]
Total Loans	248,504	170,851
Commercial Real Estate Portfolio Segment [Member] \| Owner Occupied Property [Member] \| Special Mention [Member]
Total Loans
Commercial Real Estate Portfolio Segment [Member] \| Owner Occupied Property [Member] \| Substandard [Member]
Total Loans	5,101	5,272
Commercial Real Estate Portfolio Segment [Member] \| Investment Property [Member]
Total Loans	876,282	752,258
Commercial Real Estate Portfolio Segment [Member] \| Investment Property [Member] \| Pass [Member]
Total Loans	847,966	724,203
Commercial Real Estate Portfolio Segment [Member] \| Investment Property [Member] \| Special Mention [Member]
Total Loans	6,233	5,116
Commercial Real Estate Portfolio Segment [Member] \| Investment Property [Member] \| Substandard [Member]
Total Loans	22,083	22,939
Commercial Portfolio Segment [Member] \| Construction Loans [Member]
Total Loans	93	1,497
Commercial Portfolio Segment [Member] \| Construction Loans [Member] \| Pass [Member]
Total Loans		1,400
Commercial Portfolio Segment [Member] \| Construction Loans [Member] \| Special Mention [Member]
Total Loans	93	97
Consumer and Other [Member]
Total Loans	92,055	73,621
Consumer and Other [Member] \| Pass [Member]
Total Loans	90,131	73,621
Consumer and Other [Member] \| Substandard [Member]
Total Loans	1,924
Commercial and Industrial Sector [Member] \| Commercial Portfolio Segment [Member]
Total Loans	257,124	213,983
Commercial and Industrial Sector [Member] \| Commercial Portfolio Segment [Member] \| Pass [Member]
Total Loans	249,323	208,617
Commercial and Industrial Sector [Member] \| Commercial Portfolio Segment [Member] \| Special Mention [Member]
Total Loans	6,991	4,411
Commercial and Industrial Sector [Member] \| Commercial Portfolio Segment [Member] \| Substandard [Member]
Total Loans	810	955
Lease Financing [Member]
Total Loans	36,184
Lease Financing [Member] \| Pass [Member]
Total Loans	36,184
Lease Financing [Member] \| Commercial Portfolio Segment [Member]
Total Loans	36,184
Agricultural Sector [Member]
Total Loans	162	169
Agricultural Sector [Member] \| Pass [Member]
Total Loans	$ 162	$ 169