Uncertain Tax Positions (Long-Term Liability For Unrecognized Tax Benefits, Excluding Interest And Penalties) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2008
Uncertain Tax Positions [Abstract]
Deferred income taxes (contra assets)	$ 12,445	$ 12,445	$ 14,390
Accrued income taxes	22,244	16,749	35,674
Total liability for unrecognized tax benefits	$ 34,689	$ 29,194	$ 50,064	$ 43,625