CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)	Mar. 31, 2015	Dec. 31, 2014
Company's involvement with VIEs:
Land	$ 1,882,476,000	$ 1,889,438,000
Accumulated depreciation and amortization	2,319,791,000	2,250,757,000
Accounts Receivable	40,153,000	36,339,000
Cash and cash equivalents	137,170,000	183,810,000
Other assets, net	1,008,897,000	940,172,000
Accounts payable and accrued liabilities	314,226,000	432,934,000
Deferred Revenue	87,420,000	95,411,000
Balance Sheet Parenthetical Disclosures
Accounts receivable, allowance (in dollars)	3,629,000	3,785,000
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	461,583,731	459,746,267
Common stock, shares outstanding	461,583,731	459,746,267
VIEs
Company's involvement with VIEs:
Buildings and improvements	699,000,000	677,000,000
Land	114,000,000	113,000,000
Accumulated depreciation and amortization	120,000,000	111,000,000
Accounts Receivable	15,000,000	5,000,000
Cash and cash equivalents	36,000,000	42,000,000
Other assets, net	14,000,000	23,000,000
Accounts payable and accrued liabilities	33,000,000	34,000,000
Deferred Revenue	$ 9,000,000	$ 12,000,000