Pension (Schedule Of Net Periodic Pension Costs) (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Pension [Abstract]
Service cost	$ 81	$ 100
Interest cost	180	178
Expected return on plan assets	(293)	(296)
Recognized net actuarial loss	111	131
Net periodic pension cost	$ 79	$ 113	$ 387