Pension and Other Postretirement Plans - Schedule of Components of Net Periodic Benefit Cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Pension Plans
Components of net periodic benefit costs:
Interest cost	$ 581	$ 528	$ 674
Service cost	131	119	107
Expected return on plan assets	(1,575)	(1,425)	(1,261)
Amortization of net loss (gain)	134	539	580
Net periodic benefit cost	(729)	(239)	100
Other changes in plan assets and benefit obligations recognized in other comprehensive income (loss):
Net loss (gain)	765	(2,645)	503
Amortization of net loss (gain)	(134)	(539)	(580)
Total recognized in other comprehensive income (loss)	631	(3,184)	(77)
Total recognized in net periodic benefit cost and other comprehensive income (loss)	(98)	(3,423)	23
Chairman and President Non-Qualified Defined Benefit Plans
Components of net periodic benefit costs:
Interest cost	1,114	1,044	1,350
Service cost	1,038	1,235	1,209
Amortization of prior service cost	59	59	59
Amortization of net loss (gain)	2,338	5,131	5,781
Net periodic benefit cost	4,549	7,469	8,399
Other changes in plan assets and benefit obligations recognized in other comprehensive income (loss):
Net loss (gain)	(13,096)	(7,420)	21,736
Amortization of prior service cost	(59)	(59)	(59)
Amortization of net loss (gain)	(2,338)	(5,131)	(5,781)
Total recognized in other comprehensive income (loss)	(15,493)	(12,610)	15,896
Total recognized in net periodic benefit cost and other comprehensive income (loss)	(10,944)	(5,141)	24,295
Defined Benefit Postretirement Healthcare Plans
Components of net periodic benefit costs:
Interest cost	173	148	165
Amortization of prior service cost	0	0	0
Amortization of net loss (gain)	208	292	158
Net periodic benefit cost	381	440	323
Other changes in plan assets and benefit obligations recognized in other comprehensive income (loss):
Net loss (gain)	(1,927)	(457)	522
Amortization of prior service cost	0	0	0
Amortization of net loss (gain)	(208)	(292)	(158)
Total recognized in other comprehensive income (loss)	(2,135)	(749)	364
Total recognized in net periodic benefit cost and other comprehensive income (loss)	$ (1,754)	$ (309)	$ 687