Employee Benefit Plans (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Defined Benefit Plan Disclosure [Line Items]
Final contribution to the plan, cost	$ 3,200
Health care cost trend rate assumed	7.37%
Ultimate trend rate	4.00%
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation of pension plans	$ 1,000	$ 122,400
Weighted-average interest credit rate (as percent)		4.25%
Other postretirement benefits payments	20,500	$ 18,700	$ 16,800
Pension plan assets	0	121,127	177,499
Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Discount rate increased plan obligations	(1,000)
Health care cost trend assumption	(1,400)
Claims cost assumption	(900)
Pension plan assets	$ 0	$ 0	$ 0