Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $) In Thousands, except Share data	Sep. 30, 2011	Dec. 31, 2010
ASSETS
Net real estate related to VIEs	$ 6,179,415	$ 6,297,557
Cash and cash equivalents related to VIEs	75,831	111,325
Restricted cash related to VIEs	209,481	200,025
Investment in unconsolidated real estate partnerships related to VIEs	63,942	59,282
LIABILITIES AND EQUITY
Non-recourse property debt related to VIEs	5,233,525	5,291,612
Accrued liabilities and other related to VIEs	278,606	297,121
Equity:
Class A Common Stock, par value	$ 0.01	$ 0.01
Class A Common Stock, shares authorized	480,887,260	422,157,736
Class A Common Stock, shares issued	120,916,144	117,642,872
Class A Common Stock, shares outstanding	120,916,144	117,642,872
Variable Interest Entity, Primary Beneficiary [Member]
ASSETS
Net real estate related to VIEs	805,411	846,081
Cash and cash equivalents related to VIEs	42,644	34,808
Restricted cash related to VIEs	51,694	55,076
Investment in unconsolidated real estate partnerships related to VIEs	39,043	54,374
LIABILITIES AND EQUITY
Non-recourse property debt related to VIEs	641,847	637,967
Accrued liabilities and other related to VIEs	$ 81,901	$ 94,656

Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities.

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