Consolidated Statements of Income (USD $) In Thousands, except Share data	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
REVENUES
Property rentals	$ 43,584	$ 42,306	$ 130,473	$ 123,311
Expense reimbursements	21,153	19,084	59,172	55,789
Total revenues	64,737	61,390	189,645	179,100
EXPENSES
Operating (including fees to Vornado of $1,341, $1,285 $3,894, and $3,793, respectively)	21,913	20,799	63,051	58,672
Depreciation and amortization	8,561	7,869	25,372	23,117
General and administrative (including management fees to Vornado of $540 and $1,620 in each three and nine-month period)	1,354	4,165	3,153	6,602
Total expenses	31,828	32,833	91,576	88,391
OPERATING INCOME	32,909	28,557	98,069	90,709
Interest and other income, net	67	162	1,887	649
Interest and debt expense	(10,715)	(13,413)	(39,839)	(43,290)
Net loss on early extinguishment of debt	0	0	0	(1,238)
Income before income taxes	22,261	15,306	60,117	46,830
Income tax benefit	7	3,001	158	2,742
Net income	22,268	18,307	60,275	49,572
Net income attributable to the noncontrolling interest	(1,843)	(432)	(1,486)	(1,034)
Net income attributable to Alexander's	$ 20,425	$ 17,875	$ 58,789	$ 48,538
Net income per common share - basic
Net income per common share - basic	$ 4.00	$ 3.50	$ 11.51	$ 9.51
Weighted average shares - basic	5,106,984	5,105,936	5,106,427	5,105,936
Net income per common share - diluted
Net income per common share - diluted	$ 4.00	$ 3.50	$ 11.51	$ 9.51
Weighted average shares - diluted	5,106,984	5,105,936	5,106,427	5,105,936
Dividends per common share	$ 3.00	$ 2.50	$ 9.00	$ 5.00