Pension and Other Postretirement Plans - Narrative (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($) benefit_plan	Dec. 31, 2020 USD ($)	Dec. 31, 2019	Dec. 31, 2007
Defined Benefit Plan Disclosure [Line Items]
Average rate of return	10.90%
Number of non-qualified defined benefit pension plan | benefit_plan	3
Number of additional non-qualified defined benefit pension plan | benefit_plan	2
Number of healthcare plans | benefit_plan	2
Defined Benefit Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Vesting percentage in accrued benefits from plan freeze (in percentage)				100.00%
Actuarial gain (loss)	$ 805	$ (2,153)
Discount rate	2.75%	2.25%	3.00%
Accumulated benefit obligation	$ 22,100	$ 23,900
Defined Benefit Pension Plans | Census Demographics
Defined Benefit Plan Disclosure [Line Items]
Actuarial gain (loss)	(309)	(587)
Defined Benefit Pension Plans | Change in Mortality
Defined Benefit Plan Disclosure [Line Items]
Actuarial gain (loss)	(78)	317
Defined Benefit Pension Plans | Difference in Expected and Actual Benefit Payments
Defined Benefit Plan Disclosure [Line Items]
Actuarial gain (loss)	(127)	(45)
Defined Benefit Pension Plans | Discount rate
Defined Benefit Plan Disclosure [Line Items]
Actuarial gain (loss)	1,319	(1,838)
Chairman and President Non-Qualified Defined Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Actuarial gain (loss)	$ 7,420	$ (21,736)
Discount rate	2.75%	2.25%	3.00%
Accumulated benefit obligation	$ 26,400	$ 27,000
Participant age threshold for contingent liability	70 years
Rate of compensation increase	8.00%	8.00%	8.00%
Chairman and President Non-Qualified Defined Benefit Plans | Minimum
Defined Benefit Plan Disclosure [Line Items]
Rate of compensation increase	10.00%
Chairman and President Non-Qualified Defined Benefit Plans | Census Demographics
Defined Benefit Plan Disclosure [Line Items]
Actuarial gain (loss)	$ 4,208	$ (16,720)
Chairman and President Non-Qualified Defined Benefit Plans | Change in Mortality
Defined Benefit Plan Disclosure [Line Items]
Actuarial gain (loss)	(80)	441
Chairman and President Non-Qualified Defined Benefit Plans | Discount rate
Defined Benefit Plan Disclosure [Line Items]
Actuarial gain (loss)	3,292	(5,457)
Defined Benefit Postretirement Healthcare Plans
Defined Benefit Plan Disclosure [Line Items]
Actuarial gain (loss)	$ 457	$ (522)
Discount rate	2.75%	2.25%	3.00%
Accumulated benefit obligation	$ 6,200	$ 6,500
Defined Benefit Postretirement Healthcare Plans | Change in Mortality
Defined Benefit Plan Disclosure [Line Items]
Actuarial gain (loss)	(30)	104
Defined Benefit Postretirement Healthcare Plans | Discount rate
Defined Benefit Plan Disclosure [Line Items]
Actuarial gain (loss)	610	(893)
Defined Benefit Postretirement Healthcare Plans | Claims/Healthcare Cost Trend Experience
Defined Benefit Plan Disclosure [Line Items]
Actuarial gain (loss)	$ (123)	(389)
Defined Benefit Postretirement Healthcare Plans | Change In Actuarial Assumptions
Defined Benefit Plan Disclosure [Line Items]
Actuarial gain (loss)		$ 656