Income Taxes (Balance Sheet Classification Of Unrecognized Tax Benefits) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2008
Income Taxes [Abstract]
Accrued expenses	$ 4,687	$ 5,620	$ 3,333
Other long-term liabilities	37,014	52,545	69,278
Total	$ 41,701	$ 58,165	$ 72,611	$ 41,400