LOANS AND LEASES (Schedule of Risk Category of Loans by Class of Loans) (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Total loans	$ 4,403,045	$ 4,389,641
Lease Financing [Member]
Total loans	268,436	258,401
Agricultural Sector [Member]
Total loans	2,725	3,043
Residential Portfolio Segment [Member] \| Junior Lien [Member]
Total loans	6,817	7,011
Residential Portfolio Segment [Member] \| Primary Residential Mortgages [Member]
Total loans	557,053	578,306
Residential Portfolio Segment [Member] \| Home Equity Lines of Credit [Member]
Total loans	55,856	57,248
Residential Portfolio Segment [Member] \| Multifamily Property [Member]
Total loans	1,203,487	1,210,003
Commercial Real Estate Portfolio Segment [Member] \| Investment Property [Member]
Total loans	1,092,294	1,095,182
Commercial Portfolio Segment [Member] \| Commercial and Industrial Sector [Member]
Total loans	904,949	867,295
Commercial Portfolio Segment [Member] \| Construction [Member]
Total loans	3,137	5,520
Consumer and Other Loans [Member]
Total loans	56,998	58,213
Pass [Member]
Total loans	4,330,885	4,317,090
Pass [Member] \| Lease Financing [Member]
Total loans	268,436	258,401
Pass [Member] \| Agricultural Sector [Member]
Total loans	2,725	3,043
Pass [Member] \| Residential Portfolio Segment [Member] \| Junior Lien [Member]
Total loans	6,802	6,992
Pass [Member] \| Residential Portfolio Segment [Member] \| Primary Residential Mortgages [Member]
Total loans	548,902	570,353
Pass [Member] \| Residential Portfolio Segment [Member] \| Home Equity Lines of Credit [Member]
Total loans	55,854	57,245
Pass [Member] \| Residential Portfolio Segment [Member] \| Multifamily Property [Member]
Total loans	1,202,783	1,209,288
Pass [Member] \| Commercial Real Estate Portfolio Segment [Member] \| Owner Occupied Property [Member]
Total loans	249,459	247,388
Pass [Member] \| Commercial Real Estate Portfolio Segment [Member] \| Investment Property [Member]
Total loans	1,050,812	1,053,445
Pass [Member] \| Commercial Portfolio Segment [Member] \| Commercial and Industrial Sector [Member]
Total loans	885,059	847,285
Pass [Member] \| Commercial Portfolio Segment [Member] \| Construction [Member]
Total loans	3,055	5,437
Pass [Member] \| Consumer and Other Loans [Member]
Total loans	56,998	58,213
Special Mention [Member]
Total loans	13,222	13,643
Special Mention [Member] \| Residential Portfolio Segment [Member] \| Primary Residential Mortgages [Member]
Total loans	844	853
Special Mention [Member] \| Commercial Real Estate Portfolio Segment [Member] \| Investment Property [Member]
Total loans	6,288	6,325
Special Mention [Member] \| Commercial Portfolio Segment [Member] \| Commercial and Industrial Sector [Member]
Total loans	6,008	6,382
Special Mention [Member] \| Commercial Portfolio Segment [Member] \| Construction [Member]
Total loans	82	83
Substandard [Member]
Total loans	58,938	58,908
Substandard [Member] \| Residential Portfolio Segment [Member] \| Junior Lien [Member]
Total loans	15	19
Substandard [Member] \| Residential Portfolio Segment [Member] \| Primary Residential Mortgages [Member]
Total loans	7,307	7,100
Substandard [Member] \| Residential Portfolio Segment [Member] \| Home Equity Lines of Credit [Member]
Total loans	2	3
Substandard [Member] \| Residential Portfolio Segment [Member] \| Multifamily Property [Member]
Total loans	704	715
Substandard [Member] \| Commercial Real Estate Portfolio Segment [Member] \| Owner Occupied Property [Member]
Total loans	1,834	2,031
Substandard [Member] \| Commercial Real Estate Portfolio Segment [Member] \| Investment Property [Member]
Total loans	35,194	35,412
Substandard [Member] \| Commercial Portfolio Segment [Member] \| Commercial and Industrial Sector [Member]
Total loans	$ 13,882	$ 13,628