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%