CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Company's involvement with VIEs:
Land	$ 1,889,438,000	$ 1,822,862,000
Accumulated depreciation and amortization	2,250,757,000	1,965,592,000
Accounts Receivable	36,339,000	27,494,000
Cash and cash equivalents	183,810,000	300,556,000
Other assets, net	940,172,000	867,705,000
Accounts payable and accrued liabilities	432,934,000	318,427,000
Deferred Revenue	95,411,000	65,872,000
Balance Sheet Parenthetical Disclosures
Accounts receivable, allowance (in dollars)	3,785,000	1,529,000
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	459,746,267	456,960,648
Common stock, shares outstanding	459,746,267	456,960,648
VIEs
Company's involvement with VIEs:
Buildings and improvements	677,000,000
Land	113,000,000
Accumulated depreciation and amortization	111,000,000
Accounts Receivable	5,000,000
Cash and cash equivalents	42,000,000
Other assets, net	23,000,000	1,000,000
Accounts payable and accrued liabilities	34,000,000	9,000,000
Deferred Revenue	$ 12,000,000