Employee Benefit Plans - Annual retirement plan expense assumptions (Details)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Retirement Benefits [Abstract]
Discount rate	5.47%	2.95%	2.64%
Long-term rate of return on plan assets	5.50%	5.50%	5.50%