Income Taxes (Schedule Of Unrecognized Tax Benefits) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Income Taxes [Abstract]
Balance at January 1	$ 1,896	$ 2,210
Increases related to current year tax positions	107	270
Decreases related to prior years' tax positions	(537)	(353)
Expiration of the statute of limitations for the assessment of taxes	(166)	(231)
Balance at December 31	$ 1,300	$ 1,896