Pension Benefits, Other Postretirement Benefits and Employee Savings and Investment Plans (Components of Net Periodic Benefit Cost) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]
Settlement charge	$ 534	$ 55	$ 53,213
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	0	0
Interest cost	732	908	5,641
Expected return of plan assets	(1,558)	(1,574)	(6,932)
Amortization of prior service credit	0	0	0
Amortization of net loss (gain)	387	427	1,514
Settlement charge	0	(63)	53,213
Net periodic benefit cost (credit)	(439)	(302)	53,436
Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	41	56	61
Interest cost	26	40	59
Expected return of plan assets	0	0	0
Amortization of prior service credit	(97)	(112)	(1,011)
Amortization of net loss (gain)	0	0	0
Settlement charge	0	0	0
Net periodic benefit cost (credit)	$ (30)	$ (16)	$ (891)