Income Taxes (Summary Of Reconciliation Of Gross Unrecognized Tax Benefits) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Income Taxes [Abstract]
Beginning balance	$ 21,142	$ 21,965	$ 21,261
Additions based on tax positions related to the current year			484
Additions based on tax positions related to prior years	13,366	732	762
Reductions due to expiration of statute of limitations	(1,508)	(1,555)	(542)
Ending balance	$ 33,000	$ 21,142	$ 21,965