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Loans Receivable and Allowance for Credit Losses (Recorded Investment in Loans Receivable) (Details) - USD ($) $ in Thousands | Sep. 30, 2024 | Jun. 30, 2024 | Dec. 31, 2023 | Sep. 30, 2023 | Jun. 30, 2023 | Dec. 31, 2022
--- | --- | --- | --- | --- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total Loans Receivable | $ 3,125,647 |  | $ 3,317,402 | $ 3,322,139 |  |
Deferred loan fees, net | (3,040) |  | (4,086) |  |  |
Allowance for credit losses | (34,693) | $ (35,243) | (33,608) | (31,914) | $ (30,205) | $ (32,373)
Total Loans, net | 3,087,914 |  | 3,279,708 |  |  |
Residential [Member] |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total Loans Receivable | 241,050 |  | 248,295 | 251,845 |  |
Allowance for credit losses | (2,077) | (2,039) | (2,344) | (2,444) | (2,453) | (2,474)
Commercial & Multi-family [Member] |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total Loans Receivable | 2,296,886 |  | 2,434,115 | 2,444,887 |  |
Allowance for credit losses | (13,536) | (14,907) | (16,301) | (14,450) | (15,045) | (21,749)
Construction [Member] |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total Loans Receivable | 146,471 |  | 192,816 | 185,202 |  |
Allowance for credit losses | (2,376) | (2,872) | (3,841) | (4,663) | (4,090) | (2,094)
Commercial Business [Member] |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total Loans Receivable | 272,408 |  | 269,274 | 269,254 |  |
Allowance for credit losses | (8,876) | (8,323) | (5,811) | (8,166) | (5,379) | (4,495)
Business Express [Member] |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total Loans Receivable | 98,957 |  | 102,928 | 101,258 |  |
Allowance for credit losses | (7,142) | (6,444) | (4,542) | (1,485) | (2,485) | (872)
Home Equity [Member] |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total Loans Receivable | 67,566 |  | 66,331 | 66,046 |  |
Allowance for credit losses | (645) | (635) | (691) | (668) | (722) | (485)
Consumer [Member] |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total Loans Receivable | 2,309 |  | 3,643 | 3,647 |  |
Allowance for credit losses | $ (41) | $ (23) | $ (78) | $ (38) | $ (31) | $ (24)

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