Share-Based Compensation (Schedule Of Share-Based Compensation) (Details) (USD $) In Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011		Sep. 30, 2010
Total share-based compensation expense	$ 7,140	$ 7,932	$ 29,432		$ 25,618
Direct Cost Of Revenues [Member]
Total share-based compensation expense	4,111	5,264	19,932		15,746
Selling, General And Administrative Expense [Member]
Total share-based compensation expense	3,029	2,668	8,667		7,940
Special Charges [Member]
Total share-based compensation expense			$ 833	[1]	$ 1,932	[1]

[1] Expense relates to accelerated recognition of compensation cost of share-based awards.