Post-Retirement Plan (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Post-Retirement Plan [Abstract]
Matching contribution, percentage	50.00%	50.00%	50.00%
Employer contribution, percent of employee's gross pay	6.00%	6.00%	6.00%
Contribution, amount	$ 3.0	$ 3.3	$ 3.2