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Loans Receivable and Allowance for Credit Losses (Delinquency Status of Total Loans) (Details) - USD ($) | Mar. 31, 2024 | Dec. 31, 2023 | Mar. 31, 2023
--- | --- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable | $ 3,265,145,000 | $ 3,317,402,000 | $ 3,265,971,000
Loans Receivable >90 Days and Accruing | 0 | 0 |
Total Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable | 41,561,000 | 32,654,000 |
30 To 59 Days Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable | 12,595,000 | 15,338,000 |
60 To 90 Days Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable | 19,095,000 | 8,487,000 |
Greater Than 90 Days [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable | 9,871,000 | 8,829,000 |
Current [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable | 3,223,584,000 | 3,284,748,000 |
Residential [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable | 244,762,000 | 248,295,000 | 246,683,000
Commercial & Multi-family [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable | 2,392,970,000 | 2,434,115,000 | 2,466,932,000
Construction [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable | 180,975,000 | 192,816,000 | 162,553,000
Commercial Business [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable | 276,864,000 | 269,274,000 | 241,993,000
Business Express [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable | 101,209,000 | 102,928,000 | 85,605,000
Home Equity [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable | 65,518,000 | 66,331,000 | 58,822,000
Consumer [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable | 2,847,000 | 3,643,000 | $ 3,383,000
Originated loans [Member] | Residential [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable | 244,762,000 | 248,295,000 |
Loans Receivable >90 Days and Accruing |  |  |
Originated loans [Member] | Residential [Member] | Total Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable | 1,807,000 | 4,971,000 |
Originated loans [Member] | Residential [Member] | 30 To 59 Days Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable | 1,499,000 | 4,701,000 |
Originated loans [Member] | Residential [Member] | 60 To 90 Days Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable | 308,000 |  |
Originated loans [Member] | Residential [Member] | Greater Than 90 Days [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable |  | 270,000 |
Originated loans [Member] | Residential [Member] | Current [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable | 242,955,000 | 243,324,000 |
Originated loans [Member] | Commercial & Multi-family [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable | 2,392,970,000 | 2,434,115,000 |
Loans Receivable >90 Days and Accruing |  |  |
Originated loans [Member] | Commercial & Multi-family [Member] | Total Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable | 27,542,000 | 16,571,000 |
Originated loans [Member] | Commercial & Multi-family [Member] | 30 To 59 Days Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable | 3,600,000 | 1,853,000 |
Originated loans [Member] | Commercial & Multi-family [Member] | 60 To 90 Days Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable | 17,100,000 | 7,876,000 |
Originated loans [Member] | Commercial & Multi-family [Member] | Greater Than 90 Days [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable | 6,842,000 | 6,842,000 |
Originated loans [Member] | Commercial & Multi-family [Member] | Current [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable | 2,365,428,000 | 2,417,544,000 |
Originated loans [Member] | Construction [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable | 180,975,000 | 192,816,000 |
Loans Receivable >90 Days and Accruing |  |  |
Originated loans [Member] | Construction [Member] | Total Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable | 1,550,000 | 4,227,000 |
Originated loans [Member] | Construction [Member] | 30 To 59 Days Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable | 577,000 | 3,641,000 |
Originated loans [Member] | Construction [Member] | 60 To 90 Days Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable | 387,000 |  |
Originated loans [Member] | Construction [Member] | Greater Than 90 Days [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable | 586,000 | 586,000 |
Originated loans [Member] | Construction [Member] | Current [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable | 179,425,000 | 188,589,000 |
Originated loans [Member] | Commercial Business [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable | 276,864,000 | 269,274,000 |
Loans Receivable >90 Days and Accruing |  |  |
Originated loans [Member] | Commercial Business [Member] | Total Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable | 6,582,000 | 3,757,000 |
Originated loans [Member] | Commercial Business [Member] | 30 To 59 Days Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable | 3,831,000 | 2,314,000 |
Originated loans [Member] | Commercial Business [Member] | 60 To 90 Days Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable | 308,000 | 362,000 |
Originated loans [Member] | Commercial Business [Member] | Greater Than 90 Days [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable | 2,443,000 | 1,081,000 |
Originated loans [Member] | Commercial Business [Member] | Current [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable | 270,282,000 | 265,517,000 |
Originated loans [Member] | Business Express [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable | 101,209,000 | 102,928,000 |
Originated loans [Member] | Business Express [Member] | Total Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable | 2,934,000 | 2,221,000 |
Originated loans [Member] | Business Express [Member] | 30 To 59 Days Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable | 2,272,000 | 1,922,000 |
Originated loans [Member] | Business Express [Member] | 60 To 90 Days Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable | 662,000 | 249,000 |
Originated loans [Member] | Business Express [Member] | Greater Than 90 Days [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable |  | 50,000 |
Originated loans [Member] | Business Express [Member] | Current [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable | 98,275,000 | 100,707,000 |
Originated loans [Member] | Home Equity [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable | 65,518,000 | 66,331,000 |
Loans Receivable >90 Days and Accruing |  |  |
Originated loans [Member] | Home Equity [Member] | Total Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable | 1,146,000 | 907,000 |
Originated loans [Member] | Home Equity [Member] | 30 To 59 Days Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable | 816,000 | 907,000 |
Originated loans [Member] | Home Equity [Member] | 60 To 90 Days Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable | 330,000 |  |
Originated loans [Member] | Home Equity [Member] | Greater Than 90 Days [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable |  |  |
Originated loans [Member] | Home Equity [Member] | Current [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable | 64,372,000 | 65,424,000 |
Originated loans [Member] | Consumer [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable | 2,847,000 | 3,643,000 |
Loans Receivable >90 Days and Accruing |  |  |
Originated loans [Member] | Consumer [Member] | Total Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable |  |  |
Originated loans [Member] | Consumer [Member] | 30 To 59 Days Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable |  |  |
Originated loans [Member] | Consumer [Member] | 60 To 90 Days Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable |  |  |
Originated loans [Member] | Consumer [Member] | Greater Than 90 Days [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable |  |  |
Originated loans [Member] | Consumer [Member] | Current [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable | $ 2,847,000 | $ 3,643,000 |

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