Pension and Other Post-Retirement Benefit Plans (Net Periodic Benefit Costs) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Pension Plans [Member]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	$ 0	$ 0	$ 0	$ 0
Interest cost	6,075	5,597	18,098	16,791
Expected return on plan assets	(11,738)	(11,875)	(35,215)	(35,625)
Net periodic benefit cost (income)	4,661	4,514	15,489	13,542
Post-Retirement Healthcare Plans [Member]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	19	24	57	72
Interest cost	15	10	44	30
Expected return on plan assets	0	0	0	0
Net periodic benefit cost (income)	$ (45)	$ (81)	$ (135)	$ (243)