Benefit Plans - Changes in Projected Benefit Obligations and Fair Value of Plan Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Changes in projected benefit obligation:
Projected benefit obligation as of the beginning of the period	$ 56,411	$ 60,479
Service cost	821	1,140	$ 1,347
Interest cost	1,538	1,538	1,642
Plan amendment	0	(446)
Actuarial gain	(15,178)	(2,508)
Benefits paid	(2,225)	(1,760)
Curtailment	0	(2,032)	0
Projected benefit obligation as of the end of the period	41,367	56,411	60,479
Changes in fair value of plan assets:
Fair value of plan assets as of the beginning of the period	49,821	46,161
Actual return (loss) on plan assets	(6,957)	5,420
Employer contributions	0	0
Benefits paid	(2,225)	(1,760)
Fair value of plan assets as of the end of the period	$ 40,639	$ 49,821	$ 46,161