Pensions and Other Postretirement Benefit Plans (Schedule of Net Periodic Benefit Plan Cost) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Defined Benefit Plan Disclosure [Line Items]
Pension charges	$ 49,100
Pension plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	1,061	$ 1,630
Interest cost	4,235	3,999
Expected return on assets	(5,099)	(4,802)
Amortization of prior service cost/(credit)	(2)	10
Amortization of net actuarial loss	1,493	1,625
Net periodic benefit cost/(credit)	1,688	2,462
Settlement charge	49,128	0
Net benefit cost/(credit)	50,816	2,462
Other postretirement benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	86	99
Interest cost	916	827
Expected return on assets	0	0
Amortization of prior service cost/(credit)	(3,366)	(3,366)
Amortization of net actuarial loss	1,412	1,695
Net periodic benefit cost/(credit)	(952)	(745)
Settlement charge	0	0
Net benefit cost/(credit)	$ (952)	$ (745)