Pension (Schedule Of Net Periodic Pension Costs) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Pension [Abstract]
Service cost	$ 83	$ 92	$ 247	$ 284
Interest cost	180	172	540	522
Expected return on plan assets	(290)	(296)	(873)	(888)
Settlement expense	225		225
Recognized net actuarial loss	120	123	351	377
Net pension cost	$ 318	$ 91	$ 490	$ 295	$ 387