Benefit Plans - Changes in Projected Benefit Obligations and Fair Value of Plan Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Changes in projected benefit obligation:
Projected benefit obligation as of the beginning of the period	$ 41,367	$ 56,411
Service cost	494	821	$ 1,140
Interest cost	2,044	1,538	1,538
Plan amendment	0	0
Actuarial loss (gain)	1,362	(15,178)
Benefits paid	(1,980)	(2,225)
Curtailment	0	0	(2,032)
Projected benefit obligation as of the end of the period	43,287	41,367	56,411
Changes in fair value of plan assets:
Fair value of plan assets as of the beginning of the period	40,639	49,821
Actual return (loss) on plan assets	3,800	(6,957)
Employer contributions	0	0
Benefits paid	(1,980)	(2,225)
Fair value of plan assets as of the end of the period	$ 42,459	$ 40,639	$ 49,821