Employee Benefit Plans (Schedule Of Net Periodic Benefit Cost) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Compensation and Retirement Disclosure [Abstract]
Service cost	$ 1,252	$ 1,008	$ 1,281
Interest cost	1,899	1,800	1,544
Expected return on plan assets	(3,165)	(2,959)	(2,449)
Recognized loss	1,423	385	1,279
Total	$ 1,409	$ 234	$ 1,655