Accrued Expenses And Other Current Liabilities (Accrued Expenses And Other Current Liabilities) (Details) (USD $) In Thousands	Sep. 30, 2011	Dec. 31, 2010
Accrued Expenses And Other Liabilities [Abstract]
Compensation and benefits	$ 554,286	$ 533,067
Income taxes	52,469	14,999
Professional fees	31,770	34,121
Travel and entertainment	19,910	16,531
Customer volume incentives	85,132	85,180
Derivative financial instruments	35,272	7,504
Deferred income taxes	1,131	1,134
Other	94,684	78,227
Total accrued expenses and other current liabilities	$ 874,654	$ 770,763