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Loans Receivable and Allowance for Credit losses (Recorded Investment in Loans Receivable) (Details) - USD ($) | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Past due loans | $ 3,317,402,000 | $ 3,082,418,000 |
Deferred loan fees, net | (4,086,000) | (4,714,000) |
Allowance for credit losses | (33,608,000) | (32,373,000) | $ (37,119,000)
Sub-total | (37,694,000) | (37,087,000) |
Financing Receivable, Net, Total | 3,279,708,000 | 3,045,331,000 |
Residential [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Past due loans | 248,295,000 | 250,123,000 |
Allowance for credit losses | (2,344,000) | (2,474,000) | (4,094,000)
Commercial And Multi-Family [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Past due loans | 2,434,115,000 | 2,345,229,000 |
Allowance for credit losses | (16,301,000) | (21,749,000) | (22,065,000)
Construction [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Past due loans | 192,816,000 | 144,931,000 |
Allowance for credit losses | (3,841,000) | (2,094,000) | (2,231,000)
Commercial Business [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Past due loans | 372,202,000 | 282,007,000 |
Allowance for credit losses | (10,353,000) | (5,367,000) | (8,000,000)
Home Equity [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Past due loans | 66,331,000 | 56,888,000 |
Allowance for credit losses | (691,000) | (485,000) | (533,000)
Consumer [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Past due loans | 3,643,000 | 3,240,000 |
Allowance for credit losses | $ (78,000) | $ (24,000) | $ (14,000)

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