Balance Sheet Components - Other Assets (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Schedule Of Other Non Current Assets [Line Items]
Deferred tax assets, net	$ 85,232	$ 16,980
Debt issuance costs, net	36,704	41,320
Prepaid expenses, non-current	34,478	59,075
Deposits	27,069	24,304
Restricted cash, non-current	8,131	4,382
Other assets, non-current	10,655	663
Other assets, non-current, total	$ 202,269	$ 146,724