Discontinued Operations (Details) (USD $)	12 Months Ended			1 Months Ended	0 Months Ended		12 Months Ended			0 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Nov. 30, 2012 Kings Plaza Energy Joint Venture [Member]	Nov. 30, 2012 Kings Plaza Regional Shopping Center [Member]	Nov. 28, 2012 Kings Plaza Regional Shopping Center [Member]	Dec. 31, 2012 Kings Plaza Regional Shopping Center [Member]	Dec. 31, 2011 Kings Plaza Regional Shopping Center [Member]	Dec. 31, 2010 Kings Plaza Regional Shopping Center [Member]	Nov. 28, 2012 Kings Plaza Regional Shopping Center [Member] Macerich [Member]
Description of Transaction
Real Estate Property Sold Gross										$ 751,000,000
Proceeds from sale of real estate										479,000,000
Common Stock From Sale of Real Estate	30,000,000	0	0							30,000,000
Financial Statement Gain						601,976,000
Disposal Group, Deferred Gain on Disposal						2,348,000
Remaining Equity Interest Percentage Acquired				75.00%
Acquisition of the noncontrolling interest	7,800,000	0	0	7,800,000
Special long-term capital gain dividend (in dollars per share) per share	$ 122.00				$ 122.00
Special long-term capital gain dividend	623,178,000				623,178,000
Disposal Group Assets And Liabilities
Assets related to discontinued operations	0	137,418,000					0	137,418,000
Liabilities related to discontinued operations	0	250,000,000					0	250,000,000
Disposal Group Income And Expenses
Total revenues							61,836,000	69,006,000	67,144,000
Total expenses							36,512,000	42,791,000	48,858,000
Operating income from discontinued operations							25,324,000	26,215,000	18,286,000
Net gain on sale of real estate	599,628,000						599,628,000	0	0
Income from discontinued operations	624,952,000	26,215,000	18,286,000				624,952,000	26,215,000	18,286,000
Fees to Vornado	$ 4,318,000	$ 3,687,000	$ 3,665,000				$ 1,608,000	$ 1,801,000	$ 1,517,000