Postretirement Benefits - Schedule of Information Regarding the SERP (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Retirement Benefits [Abstract]
Premiums paid for insurance coverage	$ 443	$ 443	$ 2,193
Total investments:
COLI	55,185	54,681
Exchange traded funds	86,156	71,258
Total investments of SERP	$ 141,341	$ 125,939