| Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] |
| |
|
Unrealized Gains and Losses on Available-for-Sale Securities |
|
|
Net Actuarial Gains (Losses) on DB Plan Assets |
|
|
Unrecognized DB Plan Prior Service Cost, Net of Amortization |
|
|
Unrealized (Losses) Gains on Fair Value of Hedged Items |
|
|
Total |
|
| |
|
(In thousands) |
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Balance at March 31, 2024 |
|
$ |
(30,687 |
) |
|
$ |
(288 |
) |
|
$ |
(1,392 |
) |
|
$ |
(98 |
) |
|
$ |
(32,465 |
) |
| Other comprehensive loss before reclassification |
|
|
(997 |
) |
|
|
— |
|
|
|
— |
|
|
|
— |
|
|
|
(997 |
) |
| Amounts reclassified from accumulated other comprehensive income |
|
|
1,663 |
|
|
|
— |
|
|
|
30 |
|
|
|
172 |
|
|
|
1,865 |
|
| Net other comprehensive income |
|
|
666 |
|
|
|
— |
|
|
|
30 |
|
|
|
172 |
|
|
|
868 |
|
| Balance at June 30, 2024 |
|
$ |
(30,021 |
) |
|
$ |
(288 |
) |
|
$ |
(1,362 |
) |
|
$ |
74 |
|
|
$ |
(31,597 |
) |
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Balance at March 31, 2025 |
|
$ |
(25,771 |
) |
|
$ |
(486 |
) |
|
$ |
(1,274 |
) |
|
$ |
(598 |
) |
|
$ |
(28,129 |
) |
| Other comprehensive income before reclassification |
|
|
97 |
|
|
|
— |
|
|
|
— |
|
|
|
— |
|
|
|
97 |
|
| Amounts reclassified from accumulated other comprehensive income |
|
|
— |
|
|
|
— |
|
|
|
30 |
|
|
|
(196 |
) |
|
|
(166 |
) |
| Net other comprehensive income (loss) |
|
|
97 |
|
|
|
— |
|
|
|
30 |
|
|
|
(196 |
) |
|
|
(69 |
) |
| Balance at June 30, 2025 |
|
$ |
(25,674 |
) |
|
$ |
(486 |
) |
|
$ |
(1,244 |
) |
|
$ |
(794 |
) |
|
$ |
(28,198 |
) |
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Balance at December 31, 2023 |
|
$ |
(30,099 |
) |
|
$ |
(288 |
) |
|
$ |
(1,421 |
) |
|
$ |
(828 |
) |
|
$ |
(32,636 |
) |
| Other comprehensive loss before reclassification |
|
|
(1,585 |
) |
|
|
— |
|
|
|
— |
|
|
|
— |
|
|
|
(1,585 |
) |
| Amounts reclassified from accumulated other comprehensive income |
|
|
1,663 |
|
|
|
— |
|
|
|
59 |
|
|
|
902 |
|
|
|
2,624 |
|
| Net other comprehensive income |
|
|
78 |
|
|
|
— |
|
|
|
59 |
|
|
|
902 |
|
|
|
1,039 |
|
| Balance at June 30, 2024 |
|
$ |
(30,021 |
) |
|
$ |
(288 |
) |
|
$ |
(1,362 |
) |
|
$ |
74 |
|
|
$ |
(31,597 |
) |
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Balance at December 31, 2024 |
|
$ |
(28,210 |
) |
|
$ |
(486 |
) |
|
$ |
(1,303 |
) |
|
$ |
(173 |
) |
|
$ |
(30,172 |
) |
| Other comprehensive income before reclassification |
|
|
2,536 |
|
|
|
— |
|
|
|
— |
|
|
|
— |
|
|
|
2,536 |
|
| Amounts reclassified from accumulated other comprehensive income |
|
|
— |
|
|
|
— |
|
|
|
59 |
|
|
|
(621 |
) |
|
|
(562 |
) |
| Net other comprehensive income (loss) |
|
|
2,536 |
|
|
|
— |
|
|
|
59 |
|
|
|
(621 |
) |
|
|
1,974 |
|
| Balance at June 30, 2025 |
|
$ |
(25,674 |
) |
|
$ |
(486 |
) |
|
$ |
(1,244 |
) |
|
$ |
(794 |
) |
|
$ |
(28,198 |
) |
|