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LOANS AND LEASES (Schedule of Loans Outstanding, by Classification) (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2019 | Dec. 31, 2018
Total loans | $ 3,897,416 | $ 3,927,931
Loans and Finance Receivables, Gross [Member] | Credit Concentration Risk [Member] |  |
Total loans (in percent) | 100.00% | 100.00%
Unallocated Financing Receivables [Member] |  |
Total loans | $ 355 | $ 465
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 | $ 569,304 | $ 571,570
Residential Mortgage [Member] | Residential Portfolio Segment [Member] | Loans and Finance Receivables, Gross [Member] | Credit Concentration Risk [Member] |  |
Total loans (in percent) | 14.61% | 14.55%
Multifamily Property [Member] | Residential Portfolio Segment [Member] |  |
Total loans | $ 1,104,406 | $ 1,135,805
Multifamily Property [Member] | Residential Portfolio Segment [Member] | Loans and Finance Receivables, Gross [Member] | Credit Concentration Risk [Member] |  |
Total loans (in percent) | 28.34% | 28.92%
Commercial Mortgage [Member] | Commercial Real Estate Portfolio Segment [Member] |  |
Total loans | $ 705,221 | $ 702,165
Commercial Mortgage [Member] | Commercial Real Estate Portfolio Segment [Member] | Loans and Finance Receivables, Gross [Member] | Credit Concentration Risk [Member] |  |
Total loans (in percent) | 18.09% | 17.88%
Commercial Loans Including Equipment Financing [Member] | Commercial Real Estate Portfolio Segment [Member] |  |
Total loans | $ 1,406,215 | $ 1,397,057
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) | 36.08% | 35.57%
Home Equity Lines of Credit [Member] | Residential Portfolio Segment [Member] |  |
Total loans | $ 57,639 | $ 62,191
Home Equity Lines of Credit [Member] | Residential Portfolio Segment [Member] | Loans and Finance Receivables, Gross [Member] | Credit Concentration Risk [Member] |  |
Total loans (in percent) | 1.48% | 1.58%
Consumer Loans, Including Home Equity Loans [Member] | Consumer and Other Loans [Member] |  |
Total loans | $ 54,276 | $ 58,678
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) | 1.39% | 1.49%

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