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LOANS AND LEASES (Schedule of Loans Outstanding, by Type of Loan) (Details) - USD ($) $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2025 | Dec. 31, 2024
Total loans | $ 6,018,967 | $ 5,512,326
Loans and Finance Receivables, Gross [Member] | Credit Concentration Risk [Member] |  |
Total loans (in percent) | 100.00% | 100.00%
Unallocated Financing Receivables [Member] |  |
Total loans | $ 405 | $ 411
Unallocated Financing Receivables [Member] | Loans and Finance Receivables, Gross [Member] | Credit Concentration Risk [Member] |  |
Total loans (in percent) | 0.01% | 0.01%
Primary Residential Mortgage [Member] | Residential Portfolio Segment [Member] |  |
Total loans | $ 649,523 | $ 614,840
Primary Residential Mortgage [Member] | Residential Portfolio Segment [Member] | Loans and Finance Receivables, Gross [Member] | Credit Concentration Risk [Member] |  |
Total loans (in percent) | 10.79% | 11.15%
Multifamily Property [Member] | Residential Portfolio Segment [Member] |  |
Total loans | $ 1,796,533 | $ 1,799,754
Multifamily Property [Member] | Residential Portfolio Segment [Member] | Loans and Finance Receivables, Gross [Member] | Credit Concentration Risk [Member] |  |
Total loans (in percent) | 29.85% | 32.65%
Commercial Mortgage [Member] | Commercial Real Estate Portfolio Segment [Member] |  |
Total loans | $ 689,166 | $ 588,104
Commercial Mortgage [Member] | Commercial Real Estate Portfolio Segment [Member] | Loans and Finance Receivables, Gross [Member] | Credit Concentration Risk [Member] |  |
Total loans (in percent) | 11.45% | 10.67%
Commercial Loans Including Equipment Financing [Member] | Commercial Real Estate Portfolio Segment [Member] |  |
Total loans | $ 2,654,363 | $ 2,389,105
Commercial Loans Including Equipment Financing [Member] | Commercial Real Estate Portfolio Segment [Member] | Loans and Finance Receivables, Gross [Member] | Credit Concentration Risk [Member] |  |
Total loans (in percent) | 44.10% | 43.34%
Home Equity Lines of Credit [Member] | Residential Portfolio Segment [Member] |  |
Total loans | $ 57,166 | $ 42,327
Home Equity Lines of Credit [Member] | Residential Portfolio Segment [Member] | Loans and Finance Receivables, Gross [Member] | Credit Concentration Risk [Member] |  |
Total loans (in percent) | 0.95% | 0.77%
Consumer Loans, Including Home Equity Loans [Member] | Consumer and Other Loans [Member] |  |
Total loans | $ 171,811 | $ 77,785
Consumer Loans, Including Home Equity Loans [Member] | Consumer and Other Loans [Member] | Loans and Finance Receivables, Gross [Member] | Credit Concentration Risk [Member] |  |
Total loans (in percent) | 2.85% | 1.41%

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