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Employee Benefit Plans - Schedule of Defined Benefit Plan (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Amounts recognized on the balance sheets: |  |  |
Non-current liabilities | $ (33,816) | $ (32,652) |
SERP |  |  |
Amounts recognized on the balance sheets: |  |  |
Current liabilities | (942) | (942) |
Non-current liabilities | (33,816) | (32,652) |
Net amount recognized | (34,758) | (33,594) |
Amounts recognized in regulatory assets (liabilities) consist of: |  |  |
Prior service cost (credit) | 0 | 0 |
Net loss | 1,855 | 2,869 |
Regulatory assets (liabilities) | 1,855 | 2,869 | $ 1,995
Unfunded accrued cost | 32,903 | 30,725 |
Net liability (asset) recognized | 34,758 | 33,594 |
Changes in plan assets and benefit obligations recognized in regulatory assets (liabilities): |  |  |
Regulatory asset (liability) at beginning of year | 2,869 | 1,995 |
Net (gain) loss | (1,028) | 840 |
Amortization of prior service credit | 0 | 0 |
Amortization of net loss | 14 | 34 |
Total change in regulatory asset (liability) | (1,014) | 874 |
Regulatory asset (liability) at end of year | 1,855 | 2,869 | 1,995
Net periodic pension costs | 3,122 | 2,858 | 2,793
Change in regulatory asset (liability) | (1,014) | 874 |
Total recognized in net periodic pension cost and regulatory asset (liability) | 2,108 | 3,732 |
Additional year-end information for plans with an accumulated benefit obligation in excess of plan assets: |  |  |
Projected benefit obligation | 34,758 | 33,594 | $ 30,807
Accumulated benefit obligation | 33,196 | 30,794 |
Fair value of plan assets | $ 0 | $ 0 |
Weighted-average assumptions used to determine benefit obligations at December 31: |  |  |
Discount rate | 5.66% | 5.15% |
SERP | Maximum |  |  |
Weighted-average assumptions used to determine benefit obligations at December 31: |  |  |
Rate of compensation increase | 4.00% | 4.00% |
SERP | Minimum |  |  |
Weighted-average assumptions used to determine benefit obligations at December 31: |  |  |
Rate of compensation increase | 4.50% | 4.50% |

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