Income Taxes (Schedule Of Reconciliation Of Beginning And Ending Amount Of Unrecognized Tax Benefits ) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Reconciliation of the beginning and ending amount of unrecognized tax benefits
Beginning of year	$ 4,168,000	$ 2,476,000	$ 2,483,000
Additions based on tax positions related to the current year	1,595,000	785,000	1,105,000
Additions for tax positions in prior years	1,633,000	907,000	208,000
Reductions for tax positions in prior years	(45,000)	0	(78,000)
Reductions as a result of completed audit examinations	0	0	(1,242,000)
End of year	$ 7,351,000	$ 4,168,000	$ 2,476,000