Income Taxes (Schedule Of Total Gross Unrecognized Tax Benefit Liabilities) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Income Taxes [Abstract]
Balance, beginning of period	$ 126,516	$ 106,506	$ 121,424
Tax positions related to current year, Additions	21,113	24,320	25,036
Tax positions related to current year, Reductions	0	(3,303)	(8,380)
Tax positions related to prior years, Additions	11,171	25,581	37,014
Tax positions related to prior years, Reductions	(4,896)	(23,474)	(36,277)
Settlements	(3,067)	(2,160)	(31,517)
Lapse of statute of limitations	(3,929)	(954)	(794)
Balance, end of period	$ 146,908	$ 126,516	$ 106,506