General Information (Reconciliation Of Total Interest Cost To Interest Expense) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Real Estate And Capitalized Interest [Line Items]
Total interest cost, including amortization of debt issuance costs	$ 19,145	$ 20,364	$ 62,782	$ 64,634
Capitalized interest	(10,425)	(4,490)	(26,002)	(4,490)
Total interest expense as reported	$ 8,720	$ 15,874	$ 36,780	$ 60,144