Income Taxes (Schedule Of Gross Unrecognized Tax Positions) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Income Taxes [Abstract]
Balance as of beginning of year	$ 4,128	$ 889	$ 358
Additions based on tax positions related to the current year	500	393	429
Additions based on tax position related to prior year	109	2,846	102
Decreases based on tax position related to prior year	(801)
Balance as of end of year	$ 3,936	$ 4,128	$ 889