Employee Benefits - Obligation and Funded Status (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	$ 283,940
Fair value of plan assets at ending of year	229,701	$ 283,940
Pension Benefits
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation at beginning of year	276,587	271,744
Service cost	4,481	12,082	$ 10,829
Interest cost	7,730	6,911	8,266
Actuarial loss (gain)	(79,303)	(6,593)
Adjustment for plan amendment	0	(408)
Special event plan closure	0	0
Benefit payments	(7,819)	(7,149)
Benefit obligation at ending of year	201,676	276,587	271,744
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	283,940	248,735
Actual return on plan assets	(50,420)	37,354
Employer contributions	4,000	5,000
Benefit payments	(7,819)	(7,149)
Fair value of plan assets at ending of year	229,701	283,940	248,735
Defined Benefit Plan, Funded (Unfunded) Status of Plan, Total	28,025	7,353
Accumulated pension benefit obligation	201,669	276,518
Post-retirement Benefits
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation at beginning of year	960	31,666
Service cost	0	148	1,728
Interest cost	2	72	1,014
Actuarial loss (gain)	(122)	(1,101)
Adjustment for plan amendment	0	0
Special event plan closure	0	(28,889)
Benefit payments	(840)	(936)
Benefit obligation at ending of year	0	960	31,666
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	0	0
Actual return on plan assets		0
Employer contributions	840	936
Benefit payments	(840)	(936)
Fair value of plan assets at ending of year	0	0	$ 0
Defined Benefit Plan, Funded (Unfunded) Status of Plan, Total	$ 0	$ (960)