Benefit Plans (Change In Projected Benefit Obligation) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Benefit Plans [Abstract]
Benefit obligation at beginning of measurement year	$ 18,609	$ 19,679	$ 17,281
Service cost	337	377	337
Interest cost	701	695	778
Actuarial loss	632	(906)	2,529
Settlement loss	(1,590)
Benefits paid	(808)	(1,236)	(1,246)
Benefit obligation at end of measurement year	$ 17,881	$ 18,609	$ 19,679