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, 2022	Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Plan Disclosure [Line Items]
Settlement charge	$ 0	$ 534	$ 55
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	0	0
Interest cost	746	732	908
Expected return of plan assets	(1,359)	(1,558)	(1,574)
Amortization of prior service credit	0	0	0
Amortization of net loss (gain)	405	387	427
Settlement charge	0	0	(63)
Net periodic benefit cost (credit)	(208)	(439)	(302)
Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	89	41	56
Interest cost	36	26	40
Expected return of plan assets	0	0	0
Amortization of prior service credit	0	(97)	(112)
Amortization of net loss (gain)	0	0	0
Settlement charge	0	0	0
Net periodic benefit cost (credit)	$ 125	$ (30)	$ (16)