Income Taxes (Changes In Gross Liability For Unrecognized Tax Benefits Excluding Interest And Penalties) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Income Taxes [Abstract]
Unrecognized tax benefits, beginning of period	$ 69,805	$ 77,846
Increase in unrecognized tax benefits for tax positions taken in a prior period	13,745	5,927
Decrease in unrecognized tax benefits for tax positions taken in a prior period	(21,574)	(10,223)
Increase in unrecognized tax benefits for tax positions taken in the current period	3,036	4,448
Statute lapses	(2,249)	(647)
Settlements with taxing authorities	(5,626)	(7,546)
Unrecognized tax benefits, end of period	$ 57,137	$ 69,805