| Schedule of Components of Net Periodic Benefit Cost (Income) |
Components of Net Periodic Benefit Cost (in thousands): | | | | | | | | | | | | | | | | | | | | Retirement Plan | | Other Post-Retirement Benefits | | Three Months Ended March 31, | 2026 | 2025 | | 2026 | 2025 | | | | | | | | Service Cost | $ | 861 | | $ | 1,023 | | | $ | 105 | | $ | 130 | | | Interest Cost | 8,944 | | 9,223 | | | 3,836 | | 3,625 | | | Expected Return on Plan Assets | (14,710) | | (14,647) | | | (7,374) | | (6,536) | | | Amortization of Prior Service Cost (Credit) | 63 | | 76 | | | (65) | | (107) | | | | | | | | | Amortization of (Gains) Losses | 2,421 | | 1,620 | | | 152 | | 9 | | Net Amortization and Deferral for Regulatory Purposes (Including Volumetric Adjustments) (1) | (2,879) | | (2,946) | | | (3,560) | | (4,158) | | | | | | | | | Net Periodic Benefit Cost (Income) | $ | (5,300) | | $ | (5,651) | | | $ | (6,906) | | $ | (7,037) | |
| | | | | | | | | | | | | | | | | | | | | | | | | | Retirement Plan | | Other Post-Retirement Benefits | | Six Months Ended March 31, | 2026 | 2025 | | 2026 | 2025 | | | | | | | | Service Cost | $ | 1,723 | | $ | 2,046 | | | $ | 210 | | $ | 259 | | | Interest Cost | 17,889 | | 18,446 | | | 7,672 | | 7,251 | | | Expected Return on Plan Assets | (29,421) | | (29,293) | | | (14,748) | | (13,072) | | | Amortization of Prior Service Cost (Credit) | 126 | | 151 | | | (130) | | (214) | | | | | | | | | Amortization of (Gains) Losses | 4,841 | | 3,240 | | | 304 | | 18 | | Net Amortization and Deferral for Regulatory Purposes (Including Volumetric Adjustments) (1) | (2,977) | | (3,111) | | | (3,709) | | (4,885) | | | | | | | | | Net Periodic Benefit Cost (Income) | $ | (7,819) | | $ | (8,521) | | | $ | (10,401) | | $ | (10,643) | | | | | | | |
(1)The Company’s policy is to record retirement plan and other post-retirement benefit costs in the Utility segment on a volumetric basis to reflect the fact that the Utility segment experiences higher throughput of natural gas in the winter months and lower throughput of natural gas in the summer months.
|