Pension (Net Pension Cost) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Pension [Abstract]
Service cost - benefits earned during the period	$ 101	$ 159	$ 202	$ 318
Interest cost on projected benefit obligation	823	1,065	1,645	2,130
Expected Return on Plan Assets	(1,297)	(1,197)	(2,594)	(2,393)
Amortization of Prior Service Cost	(68)	(67)	(136)	(135)
Defined Benefit Plan, Amortization of (Gain) Loss	542	585	1,084	1,171
Net periodic pension cost	$ 101	$ 545	$ 201	$ 1,091