| Financing Receivable, Allowance for Credit Loss [Table Text Block] |
| | | At or For the Three Months Ended September 30, 2026 | |
| (dollars in thousands) | | Beginning Balance | | | Charge-offs | | | Recoveries | | | Provision for (Recapture of) Credit Losses | | | Ending Balance | |
| One-to-four family | | $ | 3,467 | | | $ | — | | | $ | — | | | $ | 231 | | | $ | 3,698 | |
| Multi-family | | | 2,196 | | | | — | | | | — | | | | (396 | ) | | | 1,800 | |
| Commercial real estate | | | 3,047 | | | | — | | | | — | | | | 173 | | | | 3,220 | |
| Construction and land | | | 861 | | | | (110 | ) | | | — | | | | 241 | | | | 992 | |
| Home equity | | | 1,440 | | | | — | | | | — | | | | (19 | ) | | | 1,421 | |
| Auto and other consumer | | | 1,969 | | | | (171 | ) | | | 91 | | | | (69 | ) | | | 1,820 | |
| Commercial business | | | 3,329 | | | | (273 | ) | | | 10 | | | | 371 | | | | 3,437 | |
| Total | | $ | 16,309 | | | $ | (554 | ) | | $ | 101 | | | $ | 532 | | | $ | 16,388 | |
| | | At or For the Nine Months Ended September 30, 2026 | |
| (dollars in thousands) | | Beginning Balance | | | Charge-offs | | | Recoveries | | | (Recapture of) Provision for Credit Losses | | | Ending Balance | |
| One-to-four family | | $ | 3,789 | | | $ | — | | | $ | — | | | $ | (91 | ) | | $ | 3,698 | |
| Multi-family | | | 2,458 | | | | — | | | | — | | | | (658 | ) | | | 1,800 | |
| Commercial real estate | | | 3,405 | | | | (3 | ) | | | — | | | | (182 | ) | | | 3,220 | |
| Construction and land | | | 661 | | | | (481 | ) | | | — | | | | 812 | | | | 992 | |
| Home equity | | | 1,329 | | | | — | | | | — | | | | 92 | | | | 1,421 | |
| Auto and other consumer | | | 1,956 | | | | (572 | ) | | | 250 | | | | 186 | | | | 1,820 | |
| Commercial business | | | 3,389 | | | | (440 | ) | | | 465 | | | | 23 | | | | 3,437 | |
| Total | | $ | 16,987 | | | $ | (1,496 | ) | | $ | 715 | | | $ | 182 | | | $ | 16,388 | |
| | | At or For the Three Months Ended September 30, 2025 | |
| (dollars in thousands) | | Beginning Balance | | | Charge-offs | | | Recoveries | | | (Recapture of) Provision for Credit Losses | | | Ending Balance | |
| One-to-four family | | $ | 4,888 | | | $ | — | | | $ | — | | | $ | (1,012 | ) | | $ | 3,876 | |
| Multi-family | | | 2,633 | | | | — | | | | — | | | | (71 | ) | | | 2,562 | |
| Commercial real estate | | | 2,462 | | | | (656 | ) | | | 6 | | | | 893 | | | | 2,705 | |
| Construction and land | | | 499 | | | | (483 | ) | | | — | | | | 633 | | | | 649 | |
| Home equity | | | 1,441 | | | | — | | | | — | | | | (49 | ) | | | 1,392 | |
| Auto and other consumer | | | 2,268 | | | | (106 | ) | | | 47 | | | | (172 | ) | | | 2,037 | |
| Commercial business | | | 4,154 | | | | (1,005 | ) | | | 675 | | | | (842 | ) | | | 2,982 | |
| Total | | $ | 18,345 | | | $ | (2,250 | ) | | $ | 728 | | | $ | (620 | ) | | $ | 16,203 | |
| | | At or For the Nine Months Ended September 30, 2025 | |
| (dollars in thousands) | | Beginning Balance | | | Charge-offs | | | Recoveries | | | (Recapture of) Provision for Credit Losses | | | Ending Balance | |
| One-to-four family | | $ | 4,757 | | | $ | — | | | $ | — | | | $ | (881 | ) | | $ | 3,876 | |
| Multi-family | | | 2,493 | | | | — | | | | — | | | | 69 | | | | 2,562 | |
| Commercial real estate | | | 2,410 | | | | (6,242 | ) | | | 32 | | | | 6,505 | | | | 2,705 | |
| Construction and land | | | 576 | | | | (857 | ) | | | 5 | | | | 925 | | | | 649 | |
| Home equity | | | 1,322 | | | | — | | | | — | | | | 70 | | | | 1,392 | |
| Auto and other consumer | | | 2,687 | | | | (622 | ) | | | 164 | | | | (192 | ) | | | 2,037 | |
| Commercial business | | | 6,204 | | | | (5,341 | ) | | | 1,761 | | | | 358 | | | | 2,982 | |
| Total | | $ | 20,449 | | | $ | (13,062 | ) | | $ | 1,962 | | | $ | 6,854 | | | $ | 16,203 | |
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