Benefit Plans (Schedule of Components of Net Periodic Benefit Cost) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Retirement Benefits [Abstract]
Service cost	$ 46	$ 48	$ 138	$ 142
Interest cost	42	40	124	122
Actuarial gain recognized	(51)	(44)	(151)	(132)
Net periodic benefit cost	$ 37	$ 44	$ 111	$ 132