Supplemental Balance Sheet Information (Schedule Of Other Current Assets) (Details) (USD $) In Thousands	Sep. 30, 2011	Dec. 31, 2010
Supplemental Balance Sheet Information [Abstract]
Non-trade receivables	$ 7,284	$ 7,308
Prepaid expenses	14,952	8,452
Foreign currency exchange forward contract asset	790	1,221
Current deferred tax assets	16,658	16,658
Other	281	235
Total other current assets	$ 39,965	$ 33,874	[1]

[1] December 31, 2010 balances were derived from the audited consolidated financial statements.