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Accumulated Other Comprehensive Income (Loss) | 9 Months Ended
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Sep. 30, 2025
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] |
Accumulated Other Comprehensive Income (Loss) | Accumulated Other Comprehensive Income (Loss) Changes in accumulated other comprehensive income ("AOCI") (loss) by component, including amounts reclassified to other comprehensive income ("OCI") (loss) and the related line item in the Consolidated Statements of Operations where net income is presented, are as follows:
|  | Three months ended |  | Three months ended
|  | September 30, 2025 |  | September 30, 2024
(in thousands) |  | Before Tax | Income Tax | Net |  | Before Tax | Income Tax | Net
Investment securities: |  |  |  |  |  |  |  |
AOCI (loss), beginning of period |  | $ | (7,202) |  | $ | (1,513) |  | $ | (5,689) |  |  | $ | (30,405) |  | $ | (6,385) |  | $ | (24,020) |
OCI before reclassifications |  | 7,803 |  | 1,638 |  | 6,165 |  |  | 25,586 |  | 5,373 |  | 20,213 |
Realized investment gains |  | (571) |  | (120) |  | (451) |  |  | (142) |  | (30) |  | (112) |
Impairment losses |  | 495 |  | 104 |  | 391 |  |  | 159 |  | 33 |  | 126 |
OCI |  | 7,727 |  | 1,622 |  | 6,105 |  |  | 25,603 |  | 5,376 |  | 20,227 |
AOCI (loss), end of period |  | $ | 525 |  | $ | 109 |  | $ | 416 |  |  | $ | (4,802) |  | $ | (1,009) |  | $ | (3,793) |
Pension and other postretirement plans: |  |  |  |  |  |  |  |
AOCI (loss), beginning of period |  | $ | (38,744) |  | $ | (8,137) |  | $ | (30,607) |  |  | $ | 8,730 |  | $ | 1,833 |  | $ | 6,897 |
OCI (loss) before reclassifications |  | (1,063) |  | (223) |  | (840) |  |  | (606) |  | (127) |  | (479) |
Amortization of prior service costs |  | 422 |  | 89 |  | 333 |  |  | 413 |  | 87 |  | 326 |
Amortization of net actuarial gain |  | (633) |  | (133) |  | (500) |  |  | (1,695) |  | (356) |  | (1,339) |
Settlement gain |  | (62) |  | (13) |  | (49) |  |  | (59) |  | (13) |  | (46) |
OCI (loss) |  | (1,336) |  | (280) |  | (1,056) |  |  | (1,947) |  | (409) |  | (1,538) |
AOCI (loss), end of period |  | $ | (40,080) |  | $ | (8,417) |  | $ | (31,663) |  |  | $ | 6,783 |  | $ | 1,424 |  | $ | 5,359 |
Total |  |  |  |  |  |  |  |
AOCI (loss), beginning of period |  | $ | (45,946) |  | $ | (9,650) |  | $ | (36,296) |  |  | $ | (21,675) |  | $ | (4,552) |  | $ | (17,123) |
Investment securities |  | 7,727 |  | 1,622 |  | 6,105 |  |  | 25,603 |  | 5,376 |  | 20,227 |
Pension and other postretirement plans |  | (1,336) |  | (280) |  | (1,056) |  |  | (1,947) |  | (409) |  | (1,538) |
OCI |  | 6,391 |  | 1,342 |  | 5,049 |  |  | 23,656 |  | 4,967 |  | 18,689 |
AOCI (loss), end of period |  | $ | (39,555) |  | $ | (8,308) |  | $ | (31,247) |  |  | $ | 1,981 |  | $ | 415 |  | $ | 1,566 |
|  | Nine months ended |  | Nine months ended
|  | September 30, 2025 |  | September 30, 2024
(in thousands) |  | Before Tax | Income Tax | Net |  | Before Tax | Income Tax | Net
Investment securities: |  |  |  |  |  |  |  |
AOCI (loss), beginning of period |  | $ | (22,442) |  | $ | (4,714) |  | $ | (17,728) |  |  | $ | (31,402) |  | $ | (6,595) |  | $ | (24,807) |
OCI before reclassifications |  | 21,264 |  | 4,465 |  | 16,799 |  |  | 23,405 |  | 4,915 |  | 18,490 |
Realized investment losses |  | 122 |  | 26 |  | 96 |  |  | 2,495 |  | 524 |  | 1,971 |
Impairment losses |  | 1,581 |  | 332 |  | 1,249 |  |  | 700 |  | 147 |  | 553 |
OCI |  | 22,967 |  | 4,823 |  | 18,144 |  |  | 26,600 |  | 5,586 |  | 21,014 |
AOCI (loss), end of period |  | $ | 525 |  | $ | 109 |  | $ | 416 |  |  | $ | (4,802) |  | $ | (1,009) |  | $ | (3,793) |
Pension and other postretirement plans: |  |  |  |  |  |  |  |
AOCI (loss), beginning of period |  | $ | (37,802) |  | $ | (7,939) |  | $ | (29,863) |  |  | $ | 14,439 |  | $ | 3,032 |  | $ | 11,407 |
OCI (loss) before reclassifications |  | (1,063) |  | (223) |  | (840) |  |  | (2,337) |  | (491) |  | (1,846) |
Amortization of prior service costs |  | 1,266 |  | 266 |  | 1,000 |  |  | 1,199 |  | 252 |  | 947 |
Amortization of net actuarial gain |  | (1,942) |  | (408) |  | (1,534) |  |  | (5,180) |  | (1,088) |  | (4,092) |
Settlement gain |  | (539) |  | (113) |  | (426) |  |  | (1,338) |  | (281) |  | (1,057) |
OCI (loss) |  | (2,278) |  | (478) |  | (1,800) |  |  | (7,656) |  | (1,608) |  | (6,048) |
AOCI (loss), end of period |  | $ | (40,080) |  | $ | (8,417) |  | $ | (31,663) |  |  | $ | 6,783 |  | $ | 1,424 |  | $ | 5,359 |
Total |  |  |  |  |  |  |  |
AOCI (loss), beginning of period |  | $ | (60,244) |  | $ | (12,653) |  | $ | (47,591) |  |  | $ | (16,963) |  | $ | (3,563) |  | $ | (13,400) |
Investment securities |  | 22,967 |  | 4,823 |  | 18,144 |  |  | 26,600 |  | 5,586 |  | 21,014 |
Pension and other postretirement plans |  | (2,278) |  | (478) |  | (1,800) |  |  | (7,656) |  | (1,608) |  | (6,048) |
OCI |  | 20,689 |  | 4,345 |  | 16,344 |  |  | 18,944 |  | 3,978 |  | 14,966 |
AOCI (loss), end of period |  | $ | (39,555) |  | $ | (8,308) |  | $ | (31,247) |  |  | $ | 1,981 |  | $ | 415 |  | $ | 1,566 |

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- Definition The entire disclosure for comprehensive income, which includes, but is not limited to, 1) the amount of income tax expense or benefit allocated to each component of other comprehensive income, including reclassification adjustments, 2) the reclassification adjustments for each classification of other comprehensive income and 3) the ending accumulated balances for each component of comprehensive income. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(19)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477250/944-220-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(21)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(23)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478524/942-220-S99-1 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 220 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/220/tableOfContent + Details
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