Pension and Other Postretirement Benefits - Plan Changes in Fair Value of Plan Assets and Funded Status (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Change in projected benefits obligation:
Projected benefit obligation at beginning of year	$ 11,324	$ 9,717
Service cost	2,870	3,225	$ 1,835
Interest cost	336	264	210
Actuarial loss	(6,111)	(1,637)
Benefits paid	(242)	(245)
Projected benefit obligation at end of year	8,177	11,324	9,717
Change in Pension Plan assets:
Fair value of Pension Plan assets at beginning of year	10,713	7,567
Actual return on Pension Plan assets	(947)	874
Contributions by employer	2,126	2,517
Benefits paid	(242)	(245)
Fair value of Pension Plan assets at end of year	11,650	10,713	$ 7,567
Funded (unfunded) status at end of year	$ 3,473	$ (611)