Pension (Net Pension Cost) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Pension [Abstract]
Service cost - benefits earned during the period	$ 159	$ 153
Interest cost on projected benefit obligation	1,065	950
Expected Return on Plan Assets	(1,196)	(1,437)
Amortization of Prior Service Cost	(68)	(68)
Defined Benefit Plan, Amortization of Gain (Loss)	586	592
Net periodic pension cost	$ 546	$ 190