Prepaid and Other Current Assets (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Prepaid Expense and Other Assets, Current [Abstract]
Prepaid income tax	$ 57,665	$ 31,384	[1]
Prepaid operating ground leases	56,916	49,585	[1]
Value added tax and other consumption tax receivables	22,443	81,276	[1]
Prepaid assets	19,037	28,031	[1]
Other miscellaneous current assets	66,790	59,997	[1]
Balance as of December 31,	$ 222,851	$ 250,273	[1]

[1] December 31, 2011 balances have been revised to reflect purchase accounting measurement period adjustments.