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LOANS (Schedule of Loans Outstanding, by Type of Loan) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Total loans |  | $ 4,372,437 | $ 4,394,137
Loans and Finance Receivables, Gross [Member] | Credit Concentration Risk [Member] |  |  |
Total loans (in percent) |  | 100.00% | 100.00%
Unallocated Financing Receivables [Member] |  |  |
Total loans |  | $ 225 | $ 349
Unallocated Financing Receivables [Member] | Loans and Finance Receivables, Gross [Member] | Credit Concentration Risk [Member] |  |  |
Total loans (in percent) |  | 0.01% | 0.01%
Residential Mortgage [Member] | Residential Portfolio Segment [Member] |  |  |
Total loans |  | $ 502,829 | $ 549,138
Residential Mortgage [Member] | Residential Portfolio Segment [Member] | Loans and Finance Receivables, Gross [Member] | Credit Concentration Risk [Member] |  |  |
Total loans (in percent) |  | 11.50% | 12.50%
Multifamily Property [Member] | Residential Portfolio Segment [Member] |  |  |
Total loans |  | $ 1,126,946 | $ 1,210,003
Multifamily Property [Member] | Residential Portfolio Segment [Member] | Loans and Finance Receivables, Gross [Member] | Credit Concentration Risk [Member] |  |  |
Total loans (in percent) |  | 25.77% | 27.54%
Commercial Mortgage [Member] | Commercial Real Estate Portfolio Segment [Member] |  |  |
Total loans |  | $ 691,294 | $ 761,244
Commercial Mortgage [Member] | Commercial Real Estate Portfolio Segment [Member] | Loans and Finance Receivables, Gross [Member] | Credit Concentration Risk [Member] |  |  |
Total loans (in percent) |  | 15.81% | 17.32%
Commercial Loans Including Equipment Financing [Member] | Commercial Real Estate Portfolio Segment [Member] |  |  |
Total loans | [1] | $ 1,950,981 | $ 1,756,477
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) | [1] | 44.62% | 39.97%
Construction [Member] | Commercial Portfolio Segment [Member] |  |  |
Total loans |  | $ 12,600 | $ 5,306
Construction [Member] | Commercial Portfolio Segment [Member] | Loans and Finance Receivables, Gross [Member] | Credit Concentration Risk [Member] |  |  |
Total loans (in percent) |  | 0.29% | 0.12%
Home Equity Lines of Credit [Member] | Residential Portfolio Segment [Member] |  |  |
Total loans |  | $ 50,546 | $ 57,248
Home Equity Lines of Credit [Member] | Residential Portfolio Segment [Member] | Loans and Finance Receivables, Gross [Member] | Credit Concentration Risk [Member] |  |  |
Total loans (in percent) |  | 1.15% | 1.30%
Consumer Loans, Including Home Equity Loans [Member] | Consumer and Other Loans [Member] |  |  |
Total loans |  | $ 37,016 | $ 54,372
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) |  | 0.85% | 1.24%
[1] | The December 31, 2020 balance includes PPP loans of $195.6 million.

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