Pension (Net Pension Cost) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Pension [Abstract]
Service cost - benefits earned during the period	$ 159	$ 152	$ 318	$ 305
Interest cost on projected benefit obligation	1,065	951	2,130	1,901
Expected Return on Plan Assets	(1,197)	(1,438)	(2,393)	(2,875)
Amortization of Prior Service Cost	(67)	(67)	(135)	(135)
Defined Benefit Plan, Amortization of Gain (Loss)	585	592	1,171	1,184
Net periodic pension cost	$ 545	$ 190	$ 1,091	$ 380