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LOANS AND LEASES (Schedule of Loan Balances by Pool Segment and Portfolio Class) (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2024	Dec. 31, 2023
Total loans	$ 5,313,459	$ 5,426,123
Total loans including net deferred costs	$ 5,315,417	$ 5,429,325
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	$ 5,313,459	$ 5,426,123
Net deferred costs	1,958	3,202
Total loans including net deferred costs	5,315,417	5,429,325
Construction [Member]
Total loans	28,578	17,987
Construction [Member] | Current Expected Credit Loss Methodology [Member]
Total loans	$ 28,578	$ 17,987
Construction [Member] | Current Expected Credit Loss Methodology [Member] | Customer Concentration Risk [Member] | Loans and Finance Receivables, Gross [Member]
Total loans (in percent)	0.54%	0.33%
Residential Portfolio Segment [Member] | Primary Residential Mortgages [Member]
Total loans	$ 590,681	$ 585,126
Residential Portfolio Segment [Member] | Primary Residential Mortgages [Member] | Current Expected Credit Loss Methodology [Member]
Total loans	$ 590,681	$ 585,126
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)	11.12%	10.78%
Residential Portfolio Segment [Member] | Multifamily Property [Member]
Total loans	$ 1,784,861	$ 1,836,390
Total loans including net deferred costs	1,784,861	1,836,390
Residential Portfolio Segment [Member] | Multifamily Property [Member] | Current Expected Credit Loss Methodology [Member]
Total loans	$ 1,784,861	$ 1,836,390
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)	33.59%	33.85%
Residential Portfolio Segment [Member] | Home Equity Lines of Credit [Member]
Total loans including net deferred costs	$ 38,971	$ 36,464
Residential Portfolio Segment [Member] | Junior Lien [Member]
Total loans	42,159	40,203
Residential Portfolio Segment [Member] | Junior Lien [Member] | Current Expected Credit Loss Methodology [Member]
Total loans	$ 42,159	$ 40,203
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)	0.79%	0.74%
Commercial Real Estate Portfolio Segment [Member] | Current Expected Credit Loss Methodology [Member]
Total loans	$ 269,743	$ 255,110
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)	5.08%	4.70%
Commercial Real Estate Portfolio Segment [Member] | Owner Occupied Property [Member]
Total loans	$ 269,743	$ 255,110
Commercial Real Estate Portfolio Segment [Member] | Investment Property [Member]
Total loans	979,188	1,061,197
Commercial Real Estate Portfolio Segment [Member] | Investment Property [Member] | Current Expected Credit Loss Methodology [Member]
Total loans	$ 979,188	$ 1,061,197
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)	18.43%	19.56%
Commercial Portfolio Segment [Member] | Construction [Member]
Total loans	$ 28,578	$ 17,987
Total loans including net deferred costs	22,421	17,721
Consumer and Other [Member]
Total loans	80,795	63,906
Consumer and Other [Member] | Current Expected Credit Loss Methodology [Member]
Total loans	$ 80,795	$ 63,906
Consumer and Other [Member] | Current Expected Credit Loss Methodology [Member] | Customer Concentration Risk [Member] | Loans and Finance Receivables, Gross [Member]
Total loans (in percent)	1.52%	1.18%
Commercial and Industrial [Member] | Current Expected Credit Loss Methodology [Member]
Total loans	$ 1,306,170	$ 1,314,781
Commercial and Industrial [Member] | Current Expected Credit Loss Methodology [Member] | Customer Concentration Risk [Member] | Loans and Finance Receivables, Gross [Member]
Total loans (in percent)	24.58%	24.23%
Commercial and Industrial [Member] | Commercial Portfolio Segment [Member]
Total loans	$ 1,306,170	$ 1,314,781
Lease Financing [Member]
Total loans	231,284	251,423
Lease Financing [Member] | Current Expected Credit Loss Methodology [Member]
Total loans	$ 231,284	$ 251,423
Lease Financing [Member] | Current Expected Credit Loss Methodology [Member] | Customer Concentration Risk [Member] | Loans and Finance Receivables, Gross [Member]
Total loans (in percent)	4.35%	4.63%

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