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LOANS AND LEASES (Schedule of Loan Balances by Pool Segment and Portfolio Class) (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2023	Dec. 31, 2022
Total loans	$ 5,431,654	$ 5,281,581
Total loans including net deferred costs	$ 5,435,016	$ 5,285,246
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	$ 5,431,654	$ 5,281,581
Net deferred costs	3,362	3,665
Total loans including net deferred costs	5,435,016	5,285,246
Construction [Member]
Total loans	16,251	9,936
Construction [Member] | Current Expected Credit Loss Methodology [Member]
Total loans	$ 16,251	$ 9,936
Construction [Member] | Current Expected Credit Loss Methodology [Member] | Customer Concentration Risk [Member] | Loans and Finance Receivables, Gross [Member]
Total loans (in percent)	0.30%	0.19%
Residential Portfolio Segment [Member] | Primary Residential Mortgages [Member]
Total loans	$ 576,104	$ 527,784
Residential Portfolio Segment [Member] | Primary Residential Mortgages [Member] | Current Expected Credit Loss Methodology [Member]
Total loans	$ 576,104	$ 527,784
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)	10.61%	9.99%
Residential Portfolio Segment [Member] | Multifamily Property [Member]
Total loans	$ 1,884,369	$ 1,863,915
Total loans including net deferred costs	1,884,369	1,863,915
Residential Portfolio Segment [Member] | Multifamily Property [Member] | Current Expected Credit Loss Methodology [Member]
Total loans	$ 1,884,369	$ 1,863,915
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)	34.69%	35.29%
Residential Portfolio Segment [Member] | Home Equity Lines of Credit [Member]
Total loans including net deferred costs	$ 34,397	$ 34,496
Residential Portfolio Segment [Member] | Junior Lien [Member]
Total loans	37,780	38,265
Residential Portfolio Segment [Member] | Junior Lien [Member] | Current Expected Credit Loss Methodology [Member]
Total loans	$ 37,780	$ 38,265
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)	0.70%	0.73%
Commercial Real Estate Portfolio Segment [Member] | Current Expected Credit Loss Methodology [Member]
Total loans	$ 258,909	$ 272,009
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)	4.77%	5.15%
Commercial Real Estate Portfolio Segment [Member] | Owner Occupied Property [Member]
Total loans	$ 258,909	$ 272,009
Commercial Real Estate Portfolio Segment [Member] | Investment Property [Member]
Total loans	1,041,189	1,044,125
Commercial Real Estate Portfolio Segment [Member] | Investment Property [Member] | Current Expected Credit Loss Methodology [Member]
Total loans	$ 1,041,189	$ 1,044,125
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)	19.17%	19.77%
Commercial Portfolio Segment [Member] | Construction [Member]
Total loans	$ 16,251	$ 9,936
Total loans including net deferred costs	9,703	4,042
Consumer and Other [Member]
Total loans	55,476	42,319
Consumer and Other [Member] | Current Expected Credit Loss Methodology [Member]
Total loans	$ 55,476	$ 42,319
Consumer and Other [Member] | Current Expected Credit Loss Methodology [Member] | Customer Concentration Risk [Member] | Loans and Finance Receivables, Gross [Member]
Total loans (in percent)	1.02%	0.80%
Commercial and Industrial [Member] | Current Expected Credit Loss Methodology [Member]
Total loans	$ 1,282,058	$ 1,194,662
Commercial and Industrial [Member] | Current Expected Credit Loss Methodology [Member] | Customer Concentration Risk [Member] | Loans and Finance Receivables, Gross [Member]
Total loans (in percent)	23.60%	22.62%
Commercial and Industrial [Member] | Commercial Portfolio Segment [Member]
Total loans	$ 1,282,058	$ 1,194,662
Lease Financing [Member]
Total loans	279,518	288,566
Lease Financing [Member] | Current Expected Credit Loss Methodology [Member]
Total loans	$ 279,518	$ 288,566
Lease Financing [Member] | Current Expected Credit Loss Methodology [Member] | Customer Concentration Risk [Member] | Loans and Finance Receivables, Gross [Member]
Total loans (in percent)	5.14%	5.46%

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