Investments in Partially Owned Entities (Tables)

3 Months Ended

Mar. 31, 2013

Schedule Of Equity Method Investments [Line Items]

Equity Method Investments

			Percentage
(Amounts in thousands)			Ownership at		Balance as of
Investments:			March 31, 2013		March 31, 2013		December 31, 2012
Toys				32.5%	$	474,466	$	478,041
Alexander’s				32.4%	$	171,820	$	171,013
Lexington(1)				n/a		-		75,542
LNR (see page 14 for details)				26.2%		241,377		224,724
India real estate ventures				4.0%-36.5%		94,691		95,516
Partially owned office buildings:
	280 Park Avenue			49.5%		199,466		197,516
	Rosslyn Plaza			43.7%-50.4%		61,827		62,627
	West 57th Street properties			50.0%		56,500		57,033
	One Park Avenue			30.3%		52,238		50,509
	666 Fifth Avenue Office Condominium			49.5%		37,212		35,527
	330 Madison Avenue			25.0%		31,581		30,277
	Warner Building			55.0%		10,118		8,775
	Fairfax Square			20.0%		5,299		5,368
	Other partially owned office buildings			Various		8,942		9,315
Other investments:
	Downtown Crossing, Boston(2)			50.0%		46,309		48,122
	Monmouth Mall			50.0%		7,380		7,205
	Other investments(3)			Various		173,256		147,187
					$	1,198,016	$	1,226,256
(1)		In the first quarter of 2013, we began accounting for our investment in Lexington as a marketable equity security - available for sale(see page 12 for details).
(2)		On April 24, 2013, the joint venture sold the site in Downtown Crossing, Boston, and we received approximately $45,000 for our 50% interest (see note 2 on page 16 for details).
(3)		Includes interests in 85 10th Avenue, Fashion Centre Mall, 50-70 West 93rd Street and others.

			Percentage	For the Three Months
(Amounts in thousands)			Ownership	Ended March 31,
Our Share of Net Income (Loss):			March 31, 2013	2013		2012
Toys:			32.5%
	Equity in net income before income taxes			$	137,888	$	157,387
	Income tax expense				(59,346)		(43,203)
	Equity in net income				78,542		114,184
	Non-cash impairment loss (see page 13 for details)				(78,542)		-
	Management fees				1,759		2,287
				$	1,759	$	116,471
Alexander’s:			32.4%
	Equity in net income			$	4,589	$	6,132
	Management, leasing and development fees				1,487		1,889
					6,076		8,021
Lexington(1)			n/a		(979)		930
LNR ( see page 14 for details)			26.2%		18,731		13,250
India real estate ventures			4.0%-36.5%		(767)		(793)
Partially owned office buildings:
	280 Park Avenue		49.5%		(2,569)		(5,595)
	Warner Building		55.0%		(2,346)		(3,010)
	666 Fifth Avenue Office Condominium		49.5%		2,019		1,715
	330 Madison Avenue		25.0%		1,304		794
	One Park Avenue		30.3%		457		331
	Rosslyn Plaza		43.7%-50.4%		(446)		158
	1101 17th Street		55.0%		384		683
	West 57th Street properties		50.0%		172		313
	Fairfax Square		20.0%		(45)		(12)
	Other partially owned office buildings		Various		488		527
					(582)		(4,096)
Other investments:
	Downtown Crossing, Boston(2)		50.0%		(2,374)		(334)
	Monmouth Mall		50.0%		859		362
	Independence Plaza(3)		n/a		-		1,682
	Other investments(4)		Various		(198)		638
					(1,713)		2,348
				$	20,766	$	19,660
(1)		In the first quarter of 2013, we began accounting for our investment in Lexington as a marketable equity security - available for sale (see page 12 for details).
(2)		On April 24, 2013, the joint venture sold the site in Downtown Crossing, Boston, and we received approximately $45,000 for our 50% interest. In connection therewith we recognized a $2,335 impairment loss in the first quarter.
(3)		In December 2012, we acquired a 58.75% interest in Independence Plaza and began to consolidate the accounts of the property into our consolidated financial statements.
(4)		Includes interests in 85 10th Avenue, Fashion Centre Mall, 50-70 West 93rd Street and others.

Schedule of debt of partially owned entities

			Percentage		Interest	100% of
			Ownership at		Rate at	Partially Owned Entities’ Debt at
(Amounts in thousands)			March 31,		March 31,	March 31,		December 31,
			2013	Maturity	2013	2013		2012
Toys:			32.5%
	Notes, loans and mortgages payable			2013-2021	7.71%	$	5,294,567	$	5,683,733
Alexander's:			32.4%
	Mortgages payable			2014-2018	3.85%	$	1,061,953	$	1,065,916
Lexington(1):
	Mortgages payable			n/a	n/a	$	-	$	1,994,179
LNR (sold in April 2013):			26.2%
	Mortgages payable			2013-2031	4.62%	$	383,804	$	309,787
	Liabilities of consolidated CMBS and CDO trusts			n/a	5.38%		90,735,416		97,211,734
						$	91,119,220	$	97,521,521
Partially owned office buildings:
	666 Fifth Avenue Office Condominium mortgage
		payable	49.5%	02/19	6.76%	$	1,124,402	$	1,109,700
	280 Park Avenue mortgage payable		49.5%	06/16	6.65%		738,240		738,228
	Warner Building mortgage payable		55.0%	05/16	6.26%		292,700		292,700
	One Park Avenue mortgage payable		30.3%	03/16	5.00%		250,000		250,000
	330 Madison Avenue mortgage payable		25.0%	06/15	1.70%		150,000		150,000
	Fairfax Square mortgage payable		20.0%	12/14	7.00%		69,906		70,127
	West 57th Street properties mortgages payable		50.0%	02/14	4.94%		20,088		20,434
	1101 17th Street mortgage payable		55.0%	01/15	1.45%		31,000		31,000
	Other		Various	Various	6.03%		76,611		69,704
						$	2,752,947	$	2,731,893
India Real Estate Ventures:
	TCG Urban Infrastructure Holdings mortgages
		payable	25.0%	2013-2022	13.51%	$	238,359	$	236,579
Other:
	Monmouth Mall mortgage payable		50.0%	09/15	5.44%		159,459		159,896
	Other(2)		Various	Various	5.02%		990,533		990,647
						$	1,149,992	$	1,150,543
(1)		In the first quarter of 2013, we began accounting for our investment in Lexington as a marketable equity security - available for sale (see page 12 for details).
(2)		Includes interests in Fashion Centre Mall, 50-70 West 93rd Street and others.

Toys R Us [Member]

Schedule Of Equity Method Investments [Line Items]

Equity Method Investment Summarized Financial Information Table [Text Block]

(Amounts in thousands)		Balance as of
Balance Sheet:		February 2, 2013			October 27, 2012
	Assets	$	11,920,000		$	12,953,000
	Liabilities		9,921,000			11,190,000
	Noncontrolling interests		49,000			44,000
	Toys “R” Us, Inc. equity		1,950,000	(1)		1,719,000
		For the Three Months Ended
Income Statement:		February 2, 2013			January 28, 2012
	Total revenues	$	5,770,000		$	5,925,000
	Net income attributable to Toys		241,000			349,000
(1)	As of March 31, 2013, the carrying amount of our investment in Toys is less than our share of Toys' equity by approximately $141,270,000. This basis difference resulted primarily from non-cash impairment losses aggregating $118,542,000 that we recognized in 2012 and 2013. We have allocated the basis difference to Toys' intangible assets (primarily trade names and trademarks). The basis difference is not being amortized and will be recognized upon disposition of our investment.

Alexanders Inc [Member]

Schedule Of Equity Method Investments [Line Items]

Equity Method Investment Summarized Financial Information Table [Text Block]

(Amounts in thousands)		Balance as of
Balance Sheet:		March 31, 2013		December 31, 2012
	Assets	$	1,485,000	$	1,482,000
	Liabilities		1,150,000		1,150,000
	Stockholders' equity		335,000		332,000
		For the Three Months Ended
Income Statement:		March 31, 2013		March 31, 2012
	Total revenues	$	49,000	$	47,000
	Net income attributable to Alexander’s		14,000		19,000

LNR [Member]

Schedule Of Equity Method Investments [Line Items]

Equity Method Investment Summarized Financial Information Table [Text Block]

(Amounts in thousands)		Balance as of
Balance Sheet:		December 31, 2012		September 30, 2012
	Assets	$	92,267,000	$	98,530,000
	Liabilities		91,204,000		97,643,000
	Noncontrolling interests		8,000		8,000
	LNR Property Corporation equity		1,055,000		879,000
		For the Three Months Ended
Income Statement:		December 31, 2012		December 31, 2011
	Total revenues	$	48,000	$	49,000
	Net income attributable to LNR		176,000		51,000