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Postretirement Benefits (Tables) | 9 Months Ended
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Sep. 30, 2025
Retirement Benefits [Abstract] |
Schedule of Pension Plan Cost (Income) | Pension plan cost (income) includes the following components:
| Three months ended September 30, |  | Nine months ended September 30,
(in thousands) | 2025 |  | 2024 |  | 2025 |  | 2024
Service cost for benefits earned | $ | 8,866 |  |  | $ | 8,628 |  |  | $ | 26,590 |  |  | $ | 25,920 |
Interest cost on benefit obligation | 14,688 |  |  | 13,195 |  |  | 44,039 |  |  | 39,503 |
Expected return on plan assets | (20,069) |  |  | (20,199) |  |  | (60,207) |  |  | (60,595) |
Prior service cost amortization | 422 |  |  | 413 |  |  | 1,266 |  |  | 1,199 |
Net actuarial gain amortization | (633) |  |  | (1,695) |  |  | (1,942) |  |  | (5,180) |
Settlement gain (1) | (62) |  |  | (59) |  |  | (539) |  |  | (1,338) |
Pension plan cost (income) (2) | $ | 3,212 |  |  | $ | 283 |  |  | $ | 9,207 |  |  | $ | (491) |
(1)Settlement accounting was required due to lump sum payments made under the SERP to former officers in 2025 and 2024. (2)Pension plan cost (income) represents total plan cost (income) before reimbursements between Indemnity and the Exchange and its insurance subsidiaries. The components of pension plan cost (income) other than the service cost components are included in the line item "Other income" in the Consolidated Statements of Operations, net of reimbursements between Indemnity and the Exchange and its insurance subsidiaries.

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- Definition Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (q) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-5 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 715 -SubTopic 20 -Subparagraph (h) -Name Accounting Standards Codification -Paragraph 1 -Section 50 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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