Pension (Net Pension Cost) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Pension [Abstract]
Service cost - benefits earned during the period	$ 101	$ 159
Interest cost on projected benefit obligation	822	1,065
Expected Return on Plan Assets	(1,297)	(1,196)
Amortization of Prior Service Cost	(68)	(68)
Defined Benefit Plan, Amortization of (Gain) Loss	542	586
Net periodic pension cost	$ 100	$ 546