Balance Sheet Components - Accounts Payable and Accrued Expenses (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Payables and Accruals [Abstract]
Accounts payable	$ 42,304	$ 30,291
Accrued compensation and benefits	94,549	92,106
Accrued interest	58,282	48,310
Accrued taxes	43,764	32,047
Accrued utilities and security	31,390	31,314
Accrued professional fees	7,844	9,753
Accrued repairs and maintenance	5,515	3,557
Accrued other	20,021	15,845
Accounts payable and accrued expenses	$ 303,669	$ 263,223