CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Company's involvement with VIEs:
Development costs	$ 395,349	$ 388,576
Land	1,971,601	1,948,757
Accumulated depreciation and amortization	2,799,969	2,541,334
Investments in unconsolidated joint ventures	592,097	605,244
Accounts Receivable	41,371	48,929
Cash	132,891	346,500
Restricted cash	71,727	60,616
Intangible assets, net	538,631	603,706
Other assets, net	794,013	802,273
Mortgage debt	762,715	932,212
Intangible liabilities, net	46,135	56,147
Accounts payable and accrued liabilities	487,033	436,239
Deferred Revenue	136,406	123,017
Balance Sheet Parenthetical Disclosures
Accounts receivable, allowance (in dollars)	$ 4,704	$ 3,261
Common stock, par value (in dollars per share)	$ 1.00	$ 1.00
Common stock, shares authorized	750,000,000	750,000,000
Common stock, shares issued	467,820,181	465,488,492
Common stock, shares outstanding	467,820,181	465,488,492
VIEs
Company's involvement with VIEs:
Buildings and improvements	$ 3,400,000	$ 3,400,000
Development costs	23,000	54,000
Land	324,000	327,000
Accumulated depreciation and amortization	629,000	537,000
Investments in unconsolidated joint ventures	14,000	14,000
Accounts Receivable	19,000	19,000
Cash	59,000	61,000
Restricted cash	27,000	21,000
Intangible assets, net	177,000	204,000
Other assets, net	68,000	63,000
Mortgage debt	568,000	589,000
Intangible liabilities, net	9,000	10,000
Accounts payable and accrued liabilities	127,000	107,000
Deferred Revenue	$ 26,000	$ 19,000