Consolidated Statements of Income (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
REVENUES
Property rentals	$ 135,908	$ 134,847	$ 133,682
Expense reimbursements	60,551	56,465	51,564
Total revenues	196,459	191,312	185,246
EXPENSES
Operating, including fees to Vornado of $4,196, $4,318, and $3,687, respectively	64,675	61,755	55,481
Depreciation and amortization	28,987	28,815	28,083
General and administrative, including management fees to Vornado of $2,380, $2,160 and $2,160, respectively	5,281	5,162	3,996
Total expenses	98,943	95,732	87,560
OPERATING INCOME	97,516	95,580	97,686
Interest and other income, net	1,527	177	1,001
Interest and debt expense	(44,540)	(45,652)	(43,898)
Income before income taxes	54,503	50,105	54,789
Income tax benefit (expense)	160	(64)	42
Income from continuing operations	54,663	50,041	54,831
Income from discontinued operations, including a $599,628 net gain on sale of real estate in 2012	2,252	624,952	26,215
Net income	56,915	674,993	81,046
Net income attributable to the noncontrolling interest	0	(606)	(1,623)
Net income attributable to Alexander's	$ 56,915	$ 674,387	$ 79,423
Income per common share- basic and diluted:
Income from continuing operations- (in dollars per share)	$ 10.70	$ 9.80	$ 10.74
Income from discontinued operations, net - (in dollars per share)	$ 0.44	$ 122.24	$ 4.81
Net income per common share (in dollars per share)	$ 11.14	$ 132.04	$ 15.55
Weighted average shares outstanding - (in shares)	5,109,055	5,107,610	5,106,568