Employee Benefit Plans - Schedule of Defined Benefit Plan (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Amounts recognized on the balance sheets:
Non-current liabilities	$ (33,636)	$ (61,365)
SERP
Amounts recognized on the balance sheets:
Current liabilities	(942)	(949)
Non-current liabilities	(29,865)	(35,140)
Net amount recognized	(30,807)	(36,089)
Amounts recognized in regulatory assets consist of:
Prior service cost (credit)	0	0
Net loss	1,995	9,097
Regulatory assets (liabilities)	1,995	9,097	$ 12,988
Unfunded accrued cost	28,812	26,992
Net liability (asset) recognized	30,807	36,089
Changes in plan assets and benefit obligations recognized in regulatory assets (liabilities):
Regulatory asset (liability) at beginning of year	9,097	12,988
Net loss	(6,522)	(2,213)
Amortization of prior service credit	0	0
Amortization of net loss	(580)	(1,678)
Total change in regulatory asset (liability)	(7,102)	(3,891)
Regulatory asset (liability) at end of year	1,995	9,097	12,988
Net periodic pension costs	2,793	3,985	2,860
Change in regulatory asset (liability)	(7,102)	(3,891)
Total recognized in net periodic pension cost and regulatory asset (liability)	(4,309)	94
Additional year-end information for plans with an accumulated benefit obligation in excess of plan assets:
Projected benefit obligation	30,807	36,089	$ 36,602
Accumulated benefit obligation	28,157	31,835
Fair value of plan assets	$ 0	$ 0
Weighted-average assumptions used to determine benefit obligations at December 31:
Discount rate	5.42%	2.87%
SERP | Maximum
Weighted-average assumptions used to determine benefit obligations at December 31:
Rate of compensation increase	4.50%	4.50%
SERP | Minimum
Weighted-average assumptions used to determine benefit obligations at December 31:
Rate of compensation increase	4.00%	4.00%