Accrued Expenses and Other Current Liabilities (Schedule of Accrued Expenses and Other Current Liabilities) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Accounts Payable and Accrued Liabilities, Current [Abstract]
Accrued compensation and employee benefits	$ 106,474	$ 102,228
Accrued taxes	118,413	108,064
Other accrued expenses	77,567	79,546
Accrued expenses and other current liabilities	$ 302,454	$ 289,838