Income Taxes (Schedule Of Provision For Income Taxes) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Taxes [Abstract]
Current, Federal	$ 14,391	$ 21,346	$ 15,190
Current, State	656	412	1,260
Current provision for income taxes	15,047	21,758	16,450
Deferred, Federal	5,799	(989)	(651)
Deferred, State	561	(9)	(354)
Deferred provision for income taxes	6,360	(998)	(1,005)
Total tax provision	$ 21,407	$ 20,760	$ 15,445