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Loans Receivable and Allowance for Loan Losses (Loan Portfolio by Pass Rating) (Details) - USD ($) $ in Thousands | Mar. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans receivable, gross | $ 2,190,677 | $ 2,203,315
Pass [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans receivable, gross | 2,171,644 | 2,180,116
Special Mention [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans receivable, gross | 9,151 | 9,716
Substandard [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans receivable, gross | 9,882 | 13,483
Residential [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans receivable, gross | 268,137 | 248,381
Commercial and Multi-family [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans receivable, gross | 1,577,816 | 1,606,976
Construction [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans receivable, gross | 101,692 | 104,996
Commercial Business [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans receivable, gross | 177,146 | 177,642
Home Equity [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans receivable, gross | 64,857 | 64,638
Consumer [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans receivable, gross | 1,029 | 682
Originated loans [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans receivable, gross | 2,007,469 | 2,010,489
Originated loans [Member] | Pass [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans receivable, gross | 1,995,927 | 1,997,449
Originated loans [Member] | Special Mention [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans receivable, gross | 7,529 | 7,179
Originated loans [Member] | Substandard [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans receivable, gross | 4,013 | 5,861
Originated loans [Member] | Residential [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans receivable, gross | 232,892 | 212,020
Originated loans [Member] | Residential [Member] | Pass [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans receivable, gross | 231,046 | 210,094
Originated loans [Member] | Residential [Member] | Special Mention [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans receivable, gross | 1,058 | 1,336
Originated loans [Member] | Residential [Member] | Substandard [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans receivable, gross | 788 | 590
Originated loans [Member] | Commercial and Multi-family [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans receivable, gross | 1,463,122 | 1,485,286
Originated loans [Member] | Commercial and Multi-family [Member] | Pass [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans receivable, gross | 1,457,940 | 1,478,472
Originated loans [Member] | Commercial and Multi-family [Member] | Special Mention [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans receivable, gross | 3,987 | 4,043
Originated loans [Member] | Commercial and Multi-family [Member] | Substandard [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans receivable, gross | 1,195 | 2,771
Originated loans [Member] | Construction [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans receivable, gross | 101,692 | 104,996
Originated loans [Member] | Construction [Member] | Pass [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans receivable, gross | 101,692 | 104,996
Originated loans [Member] | Commercial Business [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans receivable, gross | 157,351 | 157,413
Originated loans [Member] | Commercial Business [Member] | Pass [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans receivable, gross | 153,134 | 153,464
Originated loans [Member] | Commercial Business [Member] | Special Mention [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans receivable, gross | 2,481 | 1,796
Originated loans [Member] | Commercial Business [Member] | Substandard [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans receivable, gross | 1,736 | 2,153
Originated loans [Member] | Home Equity [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans receivable, gross | 51,393 | 50,100
Originated loans [Member] | Home Equity [Member] | Pass [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans receivable, gross | 51,099 | 49,753
Originated loans [Member] | Home Equity [Member] | Substandard [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans receivable, gross | 294 | 347
Originated loans [Member] | Consumer [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans receivable, gross | 1,019 | 674
Originated loans [Member] | Consumer [Member] | Pass [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans receivable, gross | 1,016 | 670
Originated loans [Member] | Consumer [Member] | Special Mention [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans receivable, gross | 3 | 4
Acquired loans recorded at fair value [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans receivable, gross | 180,006 | 187,216
Acquired loans recorded at fair value [Member] | Pass [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans receivable, gross | 174,243 | 181,680
Acquired loans recorded at fair value [Member] | Special Mention [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans receivable, gross | 1,325 | 1,742
Acquired loans recorded at fair value [Member] | Substandard [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans receivable, gross | 4,438 | 3,794
Acquired loans recorded at fair value [Member] | Residential [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans receivable, gross | 33,905 | 35,010
Acquired loans recorded at fair value [Member] | Residential [Member] | Pass [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans receivable, gross | 33,209 | 34,624
Acquired loans recorded at fair value [Member] | Residential [Member] | Substandard [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans receivable, gross | 696 | 386
Acquired loans recorded at fair value [Member] | Commercial and Multi-family [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans receivable, gross | 113,973 | 118,577
Acquired loans recorded at fair value [Member] | Commercial and Multi-family [Member] | Pass [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans receivable, gross | 110,565 | 115,130
Acquired loans recorded at fair value [Member] | Commercial and Multi-family [Member] | Special Mention [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans receivable, gross | 195 | 583
Acquired loans recorded at fair value [Member] | Commercial and Multi-family [Member] | Substandard [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans receivable, gross | 3,213 | 2,864
Acquired loans recorded at fair value [Member] | Construction [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans receivable, gross |  |
Acquired loans recorded at fair value [Member] | Commercial Business [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans receivable, gross | 18,888 | 19,319
Acquired loans recorded at fair value [Member] | Commercial Business [Member] | Pass [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans receivable, gross | 17,246 | 17,648
Acquired loans recorded at fair value [Member] | Commercial Business [Member] | Special Mention [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans receivable, gross | 1,130 | 1,159
Acquired loans recorded at fair value [Member] | Commercial Business [Member] | Substandard [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans receivable, gross | 512 | 512
Acquired loans recorded at fair value [Member] | Home Equity [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans receivable, gross | 13,230 | 14,302
Acquired loans recorded at fair value [Member] | Home Equity [Member] | Pass [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans receivable, gross | 13,213 | 14,270
Acquired loans recorded at fair value [Member] | Home Equity [Member] | Substandard [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans receivable, gross | 17 | 32
Acquired loans recorded at fair value [Member] | Consumer [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans receivable, gross | 10 | 8
Acquired loans recorded at fair value [Member] | Consumer [Member] | Pass [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans receivable, gross | 10 | 8
Acquired loans with deteriorated credit [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans receivable, gross | 3,202 | 5,610
Acquired loans with deteriorated credit [Member] | Pass [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans receivable, gross | 1,474 | 987
Acquired loans with deteriorated credit [Member] | Special Mention [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans receivable, gross | 297 | 795
Acquired loans with deteriorated credit [Member] | Substandard [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans receivable, gross | 1,431 | 3,828
Acquired loans with deteriorated credit [Member] | Residential [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans receivable, gross | 1,340 | 1,351
Acquired loans with deteriorated credit [Member] | Residential [Member] | Pass [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans receivable, gross | 782 | 788
Acquired loans with deteriorated credit [Member] | Residential [Member] | Special Mention [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans receivable, gross | 245 | 248
Acquired loans with deteriorated credit [Member] | Residential [Member] | Substandard [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans receivable, gross | 313 | 315
Acquired loans with deteriorated credit [Member] | Commercial and Multi-family [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans receivable, gross | 721 | 3,113
Acquired loans with deteriorated credit [Member] | Commercial and Multi-family [Member] | Pass [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans receivable, gross | 491 |
Acquired loans with deteriorated credit [Member] | Commercial and Multi-family [Member] | Special Mention [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans receivable, gross |  | 493
Acquired loans with deteriorated credit [Member] | Commercial and Multi-family [Member] | Substandard [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans receivable, gross | 230 | 2,620
Acquired loans with deteriorated credit [Member] | Construction [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans receivable, gross |  |
Acquired loans with deteriorated credit [Member] | Commercial Business [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans receivable, gross | 907 | 910
Acquired loans with deteriorated credit [Member] | Commercial Business [Member] | Pass [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans receivable, gross | 1 |
Acquired loans with deteriorated credit [Member] | Commercial Business [Member] | Special Mention [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans receivable, gross | 52 | 54
Acquired loans with deteriorated credit [Member] | Commercial Business [Member] | Substandard [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans receivable, gross | 854 | 856
Acquired loans with deteriorated credit [Member] | Home Equity [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans receivable, gross | 234 | 236
Acquired loans with deteriorated credit [Member] | Home Equity [Member] | Pass [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans receivable, gross | 200 | 199
Acquired loans with deteriorated credit [Member] | Home Equity [Member] | Substandard [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans receivable, gross | 34 | $ 37
Acquired loans with deteriorated credit [Member] | Consumer [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans receivable, gross |  |

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- Definition Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=118952595&loc=d3e4428-111522 + Details
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