Pension and Other Postretirement Plans - Schedule of Obligations and Funded Status (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Pension Plans
Changes in projected benefit obligations:
Projected benefit obligations at beginning of year	$ 22,056	$ 23,927
Service cost	131	119	$ 107
Interest cost	581	528	674
Actuarial (gain) loss	(4,217)	(805)
Benefits paid	(1,574)	(1,713)
Projected benefit obligations at end of year	16,977	22,056	23,927
Changes in plan assets:
Fair value of plan assets at beginning of year	23,241	20,833
Actual return on plan assets	(3,407)	3,265
Contributions	250	856
Benefits paid	(1,574)	(1,713)
Fair value of plan assets at end of year	18,510	23,241	20,833
Funded status at end of year	1,533	1,185
Chairman and President Non-Qualified Defined Benefit Plans
Changes in projected benefit obligations:
Projected benefit obligations at beginning of year	44,448	51,571
Service cost	1,038	1,235	1,209
Interest cost	1,114	1,044	1,350
Actuarial (gain) loss	(13,096)	(7,420)
Benefits paid	(1,982)	(1,982)
Projected benefit obligations at end of year	31,522	44,448	51,571
Changes in plan assets:
Fair value of plan assets at beginning of year	0	0
Contributions	1,982	1,982
Benefits paid	(1,982)	(1,982)
Fair value of plan assets at end of year	0	0	0
Funded status at end of year	(31,522)	(44,448)
Defined Benefit Postretirement Healthcare Plans
Changes in projected benefit obligations:
Projected benefit obligations at beginning of year	6,160	6,469
Interest cost	173	148	165
Actuarial (gain) loss	(1,927)	(457)
Benefits paid	0	0
Projected benefit obligations at end of year	4,406	6,160	6,469
Changes in plan assets:
Fair value of plan assets at beginning of year	0	0
Contributions	0	0
Benefits paid	0	0
Fair value of plan assets at end of year	0	0	$ 0
Funded status at end of year	$ (4,406)	$ (6,160)