Pension and Other Postretirement Benefits (Changes in the Accumulated Postretirement Benefit Obligation) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Plan amendments	$ 0	$ 162
Other Postretirement Benefits
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Projected benefit obligation at	6,202	6,443
Service cost	0	0	$ 10
Interest cost	127	125	172
Actuarial losses (gains)	(1,784)	(200)
Benefits paid	(316)	(328)
Projected benefit obligation at	4,229	6,202	$ 6,443
Fair value of plan assets	0	0
Under funded status	(4,229)	(6,202)
Unamortized prior service cost	352	412
Unrecognized actuarial gain	(278)	1,530
Net amount recognized	$ (4,155)	$ (4,260)