Postretirement Benefits - Activity for the SERP (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Retirement Benefits [Abstract]
Premiums paid for insurance coverage	$ 443	$ 2,193	$ 2,480
Total investments:
Company owned life insurance	54,681	52,791
Exchange traded funds	71,258	87,133
Total investments of SERP	$ 125,939	$ 139,924