Pension (Net Pension Cost) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Pension [Abstract]
Service cost - benefits earned during the period	$ 93	$ 159	$ 295	$ 477
Interest cost on projected benefit obligation	818	1,065	2,463	3,195
Expected Return on Plan Assets	(1,317)	(1,196)	(3,911)	(3,589)
Amortization of Prior Service Cost	(67)	(68)	(203)	(203)
Defined Benefit Plan, Amortization of (Gain) Loss	503	586	1,587	1,757
Net periodic pension cost	$ 30	$ 546	$ 231	$ 1,637