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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, 2026	Dec. 31, 2025
Total loans	$ 6,432,392	$ 6,251,972
Total loans including net deferred costs	$ 6,434,369	$ 6,253,736
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	$ 6,432,392	$ 6,251,972
Net deferred costs	1,977	1,764
Total loans including net deferred costs	6,434,369	6,253,736
Construction [Member]
Total loans	20,533	24,959
Construction [Member] | Current Expected Credit Loss Methodology [Member]
Total loans	$ 20,533	$ 24,959
Construction [Member] | Current Expected Credit Loss Methodology [Member] | Customer Concentration Risk [Member] | Loans and Finance Receivables, Gross [Member]
Total loans (in percent)	0.30%	0.40%
Residential Portfolio Segment [Member] | Primary Residential Mortgages [Member]
Total loans	$ 652,450	$ 632,890
Residential Portfolio Segment [Member] | Primary Residential Mortgages [Member] | Current Expected Credit Loss Methodology [Member]
Total loans	$ 652,450	$ 632,890
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)	10.10%	10.10%
Residential Portfolio Segment [Member] | Multifamily Property [Member]
Total loans	$ 1,824,882	$ 1,862,592
Total loans including net deferred costs	1,824,882	1,862,592
Residential Portfolio Segment [Member] | Multifamily Property [Member] | Current Expected Credit Loss Methodology [Member]
Total loans	$ 1,824,882	$ 1,862,592
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)	28.40%	29.80%
Residential Portfolio Segment [Member] | Home Equity Lines of Credit [Member]
Total loans including net deferred costs	$ 58,194	$ 59,306
Residential Portfolio Segment [Member] | Junior Lien [Member]
Total loans	60,704	61,420
Residential Portfolio Segment [Member] | Junior Lien [Member] | Current Expected Credit Loss Methodology [Member]
Total loans	$ 60,704	$ 61,420
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)	0.90%	1.00%
Commercial Real Estate Portfolio Segment [Member] | Current Expected Credit Loss Methodology [Member]
Total loans	$ 294,248	$ 289,801
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)	4.60%	4.60%
Commercial Real Estate Portfolio Segment [Member] | Owner Occupied Property [Member]
Total loans	$ 294,248	$ 289,801
Commercial Real Estate Portfolio Segment [Member] | Investment Property [Member]
Total loans	1,217,060	1,101,082
Commercial Real Estate Portfolio Segment [Member] | Investment Property [Member] | Current Expected Credit Loss Methodology [Member]
Total loans	$ 1,217,060	$ 1,101,082
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)	18.90%	17.60%
Commercial Portfolio Segment [Member] | Construction [Member]
Total loans	$ 20,533	$ 24,959
Total loans including net deferred costs	695	495
Consumer and Other [Member]
Total loans	213,732	189,633
Consumer and Other [Member] | Current Expected Credit Loss Methodology [Member]
Total loans	$ 213,732	$ 189,633
Consumer and Other [Member] | Current Expected Credit Loss Methodology [Member] | Customer Concentration Risk [Member] | Loans and Finance Receivables, Gross [Member]
Total loans (in percent)	3.30%	3.00%
Commercial and Industrial [Member] | Current Expected Credit Loss Methodology [Member]
Total loans	$ 1,875,403	$ 1,823,557
Commercial and Industrial [Member] | Current Expected Credit Loss Methodology [Member] | Customer Concentration Risk [Member] | Loans and Finance Receivables, Gross [Member]
Total loans (in percent)	29.20%	29.20%
Commercial and Industrial [Member] | Commercial Portfolio Segment [Member]
Total loans	$ 1,875,403	$ 1,823,557
Lease Financing [Member]
Total loans	273,380	266,038
Lease Financing [Member] | Current Expected Credit Loss Methodology [Member]
Total loans	$ 273,380	$ 266,038
Lease Financing [Member] | Current Expected Credit Loss Methodology [Member] | Customer Concentration Risk [Member] | Loans and Finance Receivables, Gross [Member]
Total loans (in percent)	4.30%	4.30%

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