CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Company's involvement with VIEs:
Development in process	$ 400,619	$ 388,576
Land	1,881,487	1,934,610
Accumulated depreciation and amortization	2,648,930	2,476,015
Accounts receivable	45,116	48,929
Cash	94,730	340,442
Restricted cash	42,260	46,090
Intangible assets, net	479,805	586,657
Other assets, net	711,624	794,483
Mortgage debt	623,792	932,212
Intangible liabilities, net	58,145	56,147
Accounts payable and accrued liabilities	417,360	430,786
Deferred Revenue	149,181	122,330
Balance Sheet Parenthetical Disclosures
Accounts receivable, allowance (in dollars)	$ 4,459	$ 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	468,081,489	465,488,492
Common stock, shares outstanding	468,081,489	465,488,492
VIEs
Company's involvement with VIEs:
Buildings and improvements	$ 3,500	$ 791,000
Development in process	32,000
Land	327,000	125,000
Accumulated depreciation and amortization	676,000	135,000
Accounts receivable	20,000	16,000
Cash	36,000	35,000
Restricted cash	23,000	18,000
Intangible assets, net	169,000
Other assets, net	70,000	20,000
Mortgage debt	521,000
Intangible liabilities, net	9,000
Accounts payable and accrued liabilities	121,000	60,000
Deferred Revenue	$ 23,000	$ 14,000