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Loans Receivable and Allowance for Credit Losses (Non-Accruing Loans) (Details) - USD ($) | Sep. 30, 2025 | Dec. 31, 2024 | Sep. 30, 2024
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Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Non-accrual loans with an Allowance for Credit Losses | $ 16,265,000 | $ 12,271,000 |
Non-accrual loans without an Allowance for Credit Losses | 77,252,000 | 32,437,000 |
Non-accrual loans | 93,517,000 | 44,708,000 | $ 43,201,000
Amortized cost of loans past due 90 days and still accruing | 280,000 | 7,726,000 |
Residential [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Non-accrual loans with an Allowance for Credit Losses |  | 534,000 |
Non-accrual loans without an Allowance for Credit Losses | 1,410,000 | 853,000 |
Non-accrual loans | 1,410,000 | 1,387,000 | 174,000
Commercial & Multi-family [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Non-accrual loans with an Allowance for Credit Losses | 5,993,000 | 4,823,000 |
Non-accrual loans without an Allowance for Credit Losses | 64,553,000 | 28,151,000 |
Non-accrual loans | 70,546,000 | 32,974,000 |
Amortized cost of loans past due 90 days and still accruing |  | 6,049,000 |
Construction [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Non-accrual loans with an Allowance for Credit Losses | 262,000 |  |
Non-accrual loans without an Allowance for Credit Losses | 2,048,000 | 586,000 |
Non-accrual loans | 2,310,000 | 586,000 |
Commercial Business [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Non-accrual loans with an Allowance for Credit Losses | 8,675,000 | 5,208,000 |
Non-accrual loans without an Allowance for Credit Losses | 8,767,000 | 2,425,000 |
Non-accrual loans | 17,442,000 | 7,633,000 |
Business Express [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Non-accrual loans with an Allowance for Credit Losses | 1,335,000 | 1,706,000 |
Non-accrual loans without an Allowance for Credit Losses |  | 191,000 |
Non-accrual loans | 1,335,000 | 1,897,000 | $ 43,027,000
Amortized cost of loans past due 90 days and still accruing | 244,000 | 1,677,000 |
Home Equity [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Non-accrual loans without an Allowance for Credit Losses | 474,000 | 231,000 |
Non-accrual loans | 474,000 | $ 231,000 |
Amortized cost of loans past due 90 days and still accruing | $ 36,000 |  |

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