Employee Benefit Plans - Reconciliation of Benefit Obligations, Plan Assets and Funded Status (Details) - Other postretirement benefits - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Change in benefit obligation:
Benefit obligation at beginning of year	$ 5,544	$ 6,145
Service cost	91	104	$ 103
Interest cost	119	99	154
Actuarial gain	(833)	(504)
Plan participants' contributions	600	603
Benefits paid	(1,277)	(903)
Benefit obligation, end of year	$ 4,244	$ 5,544	$ 6,145