Components of Interest Expense (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011		Dec. 31, 2010
Parent												$ 310
Interest related to sale of tax benefits									6,827	7,837		5,429
Loss on interest rate lock transactions										16,380	[1]
Other									69,206	56,951		44,227
Less - amount capitalized									(11,964)	(11,709)		(9,493)
Interest expense, net	$ 19,528	$ 15,400	$ 14,263	$ 14,878	$ 15,028	$ 23,909	$ 17,442	$ 13,080	$ 64,069	$ 69,459		$ 40,473

[1] The interest rate lock transactions are related to the OFC 2 Secured Notes and were not accounted for as a hedge (see Note 11).