Employee Benefit Plans (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Incentive stock options and SARs exercisable period	10 years
Stock awards available to be awarded	578,000
Supplemental Unemployment Benefits, Severance Benefits	$ 1.4	$ 1.6
Maximum
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Common stock issued upon the exercise of stock options, SARs and stock awards	600,000
Equity Securities
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	75.00%
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage	77.00%
Debt Securities
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	25.00%
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage	23.00%
Horizon Defined Benefit Plan
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Defined Benefit Plan, Plan Assets, Required Contributions by Employer	$ 0.0	$ 0.0