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Loans Receivable and Allowance for Credit losses (Loan Portfolio by Pass Rating) (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Loans, Current Fiscal Year | $ 281,000,000 |
Total Loans, Fiscal Year Before Latest Fiscal Year | 959,372,000 |
Total Loans, Two Years Before Latest Fiscal Year | 333,030,000 |
Total Loans, Three Years Before Latest Fiscal Year | 276,923,000 |
Total Loans, Four Years Before Latest Fiscal Year | 72,067,000 |
Total Loans, Prior | 1,021,468,000 |
Financing Receivable, Revolving | 372,777,000 |
Financing Receivable, Revolving, Converted to Term Loan | 765,000 |
Past due loans | 3,317,402,000 | $ 3,082,418,000
Gross Charge-Offs, Fiscal Year Before Latest Fiscal Year | 500,000 |
Gross Charge-Offs, Fiscal Year Before Latest Fiscal Year | 305,000 |
Gross Charge-Offs | 805,000 | 2,095,000
Substandard [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due loans | 85,700,000 | 17,800,000
Residential [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Loans, Current Fiscal Year | 17,080,000 |
Total Loans, Fiscal Year Before Latest Fiscal Year | 54,115,000 |
Total Loans, Two Years Before Latest Fiscal Year | 39,579,000 |
Total Loans, Three Years Before Latest Fiscal Year | 31,420,000 |
Total Loans, Four Years Before Latest Fiscal Year | 12,067,000 |
Total Loans, Prior | 94,034,000 |
Past due loans | 248,295,000 | 250,123,000
Residential [Member] | Pass [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Loans, Current Fiscal Year | 17,080,000 |
Total Loans, Fiscal Year Before Latest Fiscal Year | 53,623,000 |
Total Loans, Two Years Before Latest Fiscal Year | 38,178,000 |
Total Loans, Three Years Before Latest Fiscal Year | 31,420,000 |
Total Loans, Four Years Before Latest Fiscal Year | 12,067,000 |
Total Loans, Prior | 93,764,000 |
Past due loans | 246,132,000 |
Residential [Member] | Special Mention [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Loans, Fiscal Year Before Latest Fiscal Year | 492,000 |
Total Loans, Two Years Before Latest Fiscal Year | 91,000 |
Past due loans | 583,000 |
Residential [Member] | Substandard [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Loans, Two Years Before Latest Fiscal Year | 1,310,000 |
Total Loans, Prior | 270,000 |
Past due loans | 1,580,000 |
Commercial And Multi-Family [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Loans, Current Fiscal Year | 232,343,000 |
Total Loans, Fiscal Year Before Latest Fiscal Year | 827,382,000 |
Total Loans, Two Years Before Latest Fiscal Year | 228,846,000 |
Total Loans, Three Years Before Latest Fiscal Year | 218,343,000 |
Total Loans, Four Years Before Latest Fiscal Year | 51,284,000 |
Total Loans, Prior | 873,855,000 |
Financing Receivable, Revolving | 2,062,000 |
Past due loans | 2,434,115,000 | 2,345,229,000
Commercial And Multi-Family [Member] | Pass [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Loans, Current Fiscal Year | 222,435,000 |
Total Loans, Fiscal Year Before Latest Fiscal Year | 778,076,000 |
Total Loans, Two Years Before Latest Fiscal Year | 224,823,000 |
Total Loans, Three Years Before Latest Fiscal Year | 214,768,000 |
Total Loans, Four Years Before Latest Fiscal Year | 50,755,000 |
Total Loans, Prior | 824,375,000 |
Financing Receivable, Revolving | 1,922,000 |
Past due loans | 2,317,154,000 |
Commercial And Multi-Family [Member] | Special Mention [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Loans, Current Fiscal Year | 9,908,000 |
Total Loans, Fiscal Year Before Latest Fiscal Year | 34,375,000 |
Total Loans, Four Years Before Latest Fiscal Year | 529,000 |
Total Loans, Prior | 4,453,000 |
Financing Receivable, Revolving | 140,000 |
Past due loans | 49,405,000 |
Commercial And Multi-Family [Member] | Substandard [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Loans, Fiscal Year Before Latest Fiscal Year | 14,931,000 |
Total Loans, Two Years Before Latest Fiscal Year | 4,023,000 |
Total Loans, Three Years Before Latest Fiscal Year | 3,575,000 |
Total Loans, Prior | 45,027,000 |
Past due loans | 67,556,000 |
Construction [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Loans, Current Fiscal Year | 21,730,000 |
Total Loans, Fiscal Year Before Latest Fiscal Year | 75,574,000 |
Total Loans, Two Years Before Latest Fiscal Year | 59,564,000 |
Total Loans, Three Years Before Latest Fiscal Year | 22,048,000 |
Total Loans, Prior | 8,190,000 |
Financing Receivable, Revolving | 5,710,000 |
Past due loans | 192,816,000 | 144,931,000
Construction [Member] | Pass [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Loans, Current Fiscal Year | 21,730,000 |
Total Loans, Fiscal Year Before Latest Fiscal Year | 74,180,000 |
Total Loans, Two Years Before Latest Fiscal Year | 59,564,000 |
Total Loans, Three Years Before Latest Fiscal Year | 21,462,000 |
Total Loans, Prior | 5,878,000 |
Financing Receivable, Revolving | 5,710,000 |
Past due loans | 188,524,000 |
Construction [Member] | Substandard [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Loans, Fiscal Year Before Latest Fiscal Year | 1,394,000 |
Total Loans, Three Years Before Latest Fiscal Year | 586,000 |
Total Loans, Prior | 2,312,000 |
Past due loans | 4,292,000 |
Commercial Business [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Loans, Current Fiscal Year | 3,328,000 |
Total Loans, Fiscal Year Before Latest Fiscal Year | 297,000 |
Total Loans, Two Years Before Latest Fiscal Year | 2,967,000 |
Total Loans, Three Years Before Latest Fiscal Year | 4,234,000 |
Total Loans, Four Years Before Latest Fiscal Year | 7,397,000 |
Total Loans, Prior | 39,208,000 |
Financing Receivable, Revolving | 314,771,000 |
Past due loans | 372,202,000 | 282,007,000
Gross Charge-Offs | 805,000 | 2,095,000
Commercial Business [Member] | Pass [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Loans, Current Fiscal Year | 3,328,000 |
Total Loans, Fiscal Year Before Latest Fiscal Year | 297,000 |
Total Loans, Two Years Before Latest Fiscal Year | 2,967,000 |
Total Loans, Three Years Before Latest Fiscal Year | 4,234,000 |
Total Loans, Four Years Before Latest Fiscal Year | 7,080,000 |
Total Loans, Prior | 33,675,000 |
Financing Receivable, Revolving | 302,540,000 |
Past due loans | 354,121,000 |
Commercial Business [Member] | Special Mention [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Loans, Four Years Before Latest Fiscal Year | 317,000 |
Total Loans, Prior | 830,000 |
Financing Receivable, Revolving | 5,010,000 |
Past due loans | 6,157,000 |
Commercial Business [Member] | Substandard [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Loans, Prior | 4,703,000 |
Financing Receivable, Revolving | 7,221,000 |
Past due loans | 11,924,000 |
Home Equity [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Loans, Current Fiscal Year | 5,022,000 |
Total Loans, Fiscal Year Before Latest Fiscal Year | 1,533,000 |
Total Loans, Two Years Before Latest Fiscal Year | 553,000 |
Total Loans, Three Years Before Latest Fiscal Year | 769,000 |
Total Loans, Four Years Before Latest Fiscal Year | 1,280,000 |
Total Loans, Prior | 6,181,000 |
Financing Receivable, Revolving | 50,228,000 |
Financing Receivable, Revolving, Converted to Term Loan | 765,000 |
Past due loans | 66,331,000 | 56,888,000
Home Equity [Member] | Pass [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Loans, Current Fiscal Year | 5,022,000 |
Total Loans, Fiscal Year Before Latest Fiscal Year | 1,487,000 |
Total Loans, Two Years Before Latest Fiscal Year | 553,000 |
Total Loans, Three Years Before Latest Fiscal Year | 769,000 |
Total Loans, Four Years Before Latest Fiscal Year | 1,280,000 |
Total Loans, Prior | 6,181,000 |
Financing Receivable, Revolving | 50,111,000 |
Financing Receivable, Revolving, Converted to Term Loan | 553,000 |
Past due loans | 65,956,000 |
Home Equity [Member] | Substandard [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Loans, Fiscal Year Before Latest Fiscal Year | 46,000 |
Financing Receivable, Revolving | 117,000 |
Financing Receivable, Revolving, Converted to Term Loan | 212,000 |
Past due loans | 375,000 |
Consumer [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Loans, Current Fiscal Year | 1,497,000 |
Total Loans, Fiscal Year Before Latest Fiscal Year | 471,000 |
Total Loans, Two Years Before Latest Fiscal Year | 1,521,000 |
Total Loans, Three Years Before Latest Fiscal Year | 109,000 |
Total Loans, Four Years Before Latest Fiscal Year | 39,000 |
Financing Receivable, Revolving | 6,000 |
Past due loans | 3,643,000 | 3,240,000
Consumer [Member] | Pass [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Loans, Current Fiscal Year | 1,497,000 |
Total Loans, Fiscal Year Before Latest Fiscal Year | 471,000 |
Total Loans, Two Years Before Latest Fiscal Year | 1,521,000 |
Total Loans, Three Years Before Latest Fiscal Year | 109,000 |
Total Loans, Four Years Before Latest Fiscal Year | 39,000 |
Financing Receivable, Revolving | 6,000 |
Past due loans | 3,643,000 |
Originated Loans [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Loans |  | 3,082,418,000
Originated Loans [Member] | Pass [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Loans |  | 3,045,700,000
Originated Loans [Member] | Special Mention [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Loans |  | 18,902,000
Originated Loans [Member] | Substandard [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Loans |  | 17,816,000
Originated Loans [Member] | Residential [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due loans | 248,295,000 | 250,123,000
Total Loans |  | 250,123,000
Originated Loans [Member] | Residential [Member] | Pass [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Loans |  | 249,398,000
Originated Loans [Member] | Residential [Member] | Special Mention [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Loans |  | 303,000
Originated Loans [Member] | Residential [Member] | Substandard [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Loans |  | 422,000
Originated Loans [Member] | Commercial And Multi-Family [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due loans | 2,434,115,000 | 2,345,229,000
Total Loans |  | 2,345,229,000
Originated Loans [Member] | Commercial And Multi-Family [Member] | Pass [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Loans |  | 2,320,865,000
Originated Loans [Member] | Commercial And Multi-Family [Member] | Special Mention [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Loans |  | 14,183,000
Originated Loans [Member] | Commercial And Multi-Family [Member] | Substandard [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Loans |  | 10,181,000
Originated Loans [Member] | Construction [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due loans | 192,816,000 | 144,931,000
Total Loans |  | 144,931,000
Originated Loans [Member] | Construction [Member] | Pass [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Loans |  | 141,751,000
Originated Loans [Member] | Construction [Member] | Substandard [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Loans |  | 3,180,000
Originated Loans [Member] | Commercial Business [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due loans | 372,202,000 | 282,007,000
Total Loans |  | 282,007,000
Originated Loans [Member] | Commercial Business [Member] | Pass [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Loans |  | 273,770,000
Originated Loans [Member] | Commercial Business [Member] | Special Mention [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Loans |  | 4,416,000
Originated Loans [Member] | Commercial Business [Member] | Substandard [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Loans |  | 3,821,000
Originated Loans [Member] | Home Equity [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due loans | 66,331,000 | 56,888,000
Total Loans |  | 56,888,000
Originated Loans [Member] | Home Equity [Member] | Pass [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Loans |  | 56,676,000
Originated Loans [Member] | Home Equity [Member] | Substandard [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Loans |  | 212,000
Originated Loans [Member] | Consumer [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due loans | $ 3,643,000 | 3,240,000
Total Loans |  | 3,240,000
Originated Loans [Member] | Consumer [Member] | Pass [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Loans |  | $ 3,240,000

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