LOANS AND LEASES (Schedule of Loan Balances by Pool Segment and Portfolio Class) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
Mar. 31, 2025	Dec. 31, 2024
Total loans	$ 5,745,894	$ 5,510,956
Total loans including net deferred costs	$ 5,747,986	$ 5,512,326
Customer Concentration Risk [Member] \| Loans and Finance Receivables, Gross [Member]
Total loans (in percent)	100.00%	100.00%
Current Expected Credit Loss Methodology [Member]
Total loans	$ 5,745,894	$ 5,510,956
Net deferred costs	2,092	1,370
Total loans including net deferred costs	5,747,986	5,512,326
Construction [Member]
Total loans	15,983	11,204
Construction [Member] \| Current Expected Credit Loss Methodology [Member]
Total loans	$ 15,983	$ 11,204
Construction [Member] \| Current Expected Credit Loss Methodology [Member] \| Customer Concentration Risk [Member] \| Loans and Finance Receivables, Gross [Member]
Total loans (in percent)	0.28%	0.20%
Residential Portfolio Segment [Member] \| Primary Residential Mortgages [Member]
Total loans	$ 618,439	$ 609,038
Residential Portfolio Segment [Member] \| Primary Residential Mortgages [Member] \| Current Expected Credit Loss Methodology [Member]
Total loans	$ 618,439	$ 609,038
Residential Portfolio Segment [Member] \| Primary Residential Mortgages [Member] \| Current Expected Credit Loss Methodology [Member] \| Customer Concentration Risk [Member] \| Loans and Finance Receivables, Gross [Member]
Total loans (in percent)	10.76%	11.05%
Residential Portfolio Segment [Member] \| Multifamily Property [Member]
Total loans	$ 1,775,132	$ 1,799,754
Total loans including net deferred costs	1,775,132	1,799,754
Residential Portfolio Segment [Member] \| Multifamily Property [Member] \| Current Expected Credit Loss Methodology [Member]
Total loans	$ 1,775,132	$ 1,799,754
Residential Portfolio Segment [Member] \| Multifamily Property [Member] \| Current Expected Credit Loss Methodology [Member] \| Customer Concentration Risk [Member] \| Loans and Finance Receivables, Gross [Member]
Total loans (in percent)	30.89%	32.66%
Residential Portfolio Segment [Member] \| Home Equity Lines of Credit [Member]
Total loans including net deferred costs	$ 48,301	$ 42,327
Residential Portfolio Segment [Member] \| Junior Lien [Member]
Total loans	51,087	45,307
Residential Portfolio Segment [Member] \| Junior Lien [Member] \| Current Expected Credit Loss Methodology [Member]
Total loans	$ 51,087	$ 45,307
Residential Portfolio Segment [Member] \| Junior Lien [Member] \| Current Expected Credit Loss Methodology [Member] \| Customer Concentration Risk [Member] \| Loans and Finance Receivables, Gross [Member]
Total loans (in percent)	0.89%	0.82%
Commercial Real Estate Portfolio Segment [Member] \| Current Expected Credit Loss Methodology [Member]
Total loans	$ 292,588	$ 275,089
Commercial Real Estate Portfolio Segment [Member] \| Current Expected Credit Loss Methodology [Member] \| Customer Concentration Risk [Member] \| Loans and Finance Receivables, Gross [Member]
Total loans (in percent)	5.09%	4.99%
Commercial Real Estate Portfolio Segment [Member] \| Owner Occupied Property [Member]
Total loans	$ 292,588	$ 275,089
Commercial Real Estate Portfolio Segment [Member] \| Investment Property [Member]
Total loans	986,220	978,436
Commercial Real Estate Portfolio Segment [Member] \| Investment Property [Member] \| Current Expected Credit Loss Methodology [Member]
Total loans	$ 986,220	$ 978,436
Commercial Real Estate Portfolio Segment [Member] \| Investment Property [Member] \| Current Expected Credit Loss Methodology [Member] \| Customer Concentration Risk [Member] \| Loans and Finance Receivables, Gross [Member]
Total loans (in percent)	17.16%	17.75%
Commercial Portfolio Segment [Member] \| Construction [Member]
Total loans	$ 15,983	$ 11,204
Total loans including net deferred costs	0	0
Consumer and Other [Member]
Total loans	142,290	80,165
Consumer and Other [Member] \| Current Expected Credit Loss Methodology [Member]
Total loans	$ 142,290	$ 80,165
Consumer and Other [Member] \| Current Expected Credit Loss Methodology [Member] \| Customer Concentration Risk [Member] \| Loans and Finance Receivables, Gross [Member]
Total loans (in percent)	2.48%	1.46%
Commercial and Industrial [Member] \| Current Expected Credit Loss Methodology [Member]
Total loans	$ 1,611,043	$ 1,489,466
Commercial and Industrial [Member] \| Current Expected Credit Loss Methodology [Member] \| Customer Concentration Risk [Member] \| Loans and Finance Receivables, Gross [Member]
Total loans (in percent)	28.04%	27.03%
Commercial and Industrial [Member] \| Commercial Portfolio Segment [Member]
Total loans	$ 1,611,043	$ 1,489,466
Lease Financing [Member]
Total loans	253,112	222,497
Lease Financing [Member] \| Current Expected Credit Loss Methodology [Member]
Total loans	$ 253,112	$ 222,497
Lease Financing [Member] \| Current Expected Credit Loss Methodology [Member] \| Customer Concentration Risk [Member] \| Loans and Finance Receivables, Gross [Member]
Total loans (in percent)	4.41%	4.04%