Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2013

Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]

Schedule of Fair Values of Financial Assets and Liabilities by Levels [Table Text Block]

		As of March 31, 2013
(Amounts in thousands)		Total		Level 1		Level 2		Level 3
Marketable securities		$	382,987	$	382,987	$	-	$	-
Real Estate Fund investments (75% of which is attributable to
	noncontrolling interests)		571,306		-		-		571,306
Deferred compensation plan assets (included in other assets)			109,483		44,473		-		65,010
J.C. Penney derivative position (included in other assets)⁽¹⁾			8,247		-		8,247		-
	Total assets	$	1,072,023	$	427,460	$	8,247	$	636,316

Mandatorily redeemable instruments (included in other liabilities)		$	55,097	$	55,097	$	-	$	-
Interest rate swap (included in other liabilities)			47,547		-		47,547		-
	Total liabilities	$	102,644	$	55,097	$	47,547	$	-


(1) Represents the cash deposited with the counterparty in excess of the mark-to-market loss on the derivative position.

		As of December 31, 2012
(Amounts in thousands)		Total		Level 1		Level 2		Level 3
Marketable securities		$	398,188	$	398,188	$	-	$	-
Real Estate Fund investments (75% of which is attributable to
	noncontrolling interests)		600,786		-		-		600,786
Deferred compensation plan assets (included in other assets)			105,200		42,569		-		62,631
J.C. Penney derivative position (included in other assets)⁽¹⁾			11,165		-		11,165		-
	Total assets	$	1,115,339	$	440,757	$	11,165	$	663,417

Mandatorily redeemable instruments (included in other liabilities)		$	55,011	$	55,011	$	-	$	-
Interest rate swap (included in other liabilities)			50,070		-		50,070		-
	Total liabilities	$	105,081	$	55,011	$	50,070	$	-


(1) Represents the cash deposited with the counterparty in excess of the mark-to-market loss on the derivative position.

Schedule Of Carrying Amounts And Fair Values Of Financial Instruments [Table Text Block]

			As of March 31, 2013				As of December 31, 2012
			Carrying		Fair		Carrying		Fair
(Amounts in thousands)			Amount		Value		Amount		Value
	Cash equivalents		$	355,650	$	355,650	$	543,000	$	543,000
	Mortgage and mezzanine loans receivable			225,221		230,044		225,359		221,446
			$	580,871	$	585,694	$	768,359	$	764,446
	Debt:
		Mortgages payable	$	9,063,084	$	9,202,000	$	8,663,326	$	8,690,000
		Senior unsecured notes		1,358,095		1,471,000		1,358,008		1,468,000
		Revolving credit facility debt		-		-		1,170,000		1,170,000
			$	10,421,179	$	10,673,000	$	11,191,334	$	11,328,000

Non Financial Assets Measured At Fair Value On Nonrecurring Basis [Table Text Block]

			As of March 31, 2013
(Amounts in thousands)			Total		Level 1		Level 2		Level 3
	Investment in Toys"R" Us		$	474,466	$	-	$	-	$	474,466

			As of December 31, 2012
(Amounts in thousands)			Total		Level 1		Level 2		Level 3
	Investment in Toys"R" Us		$	478,041	$	-	$	-	$	478,041
	Real estate assets			189,529		-		-		189,529
	Condominium units (included in other assets)			52,142		-		-		52,142
		Total assets	$	719,712	$	-	$	-	$	719,712

Real Estate Fund Investments [Member]

Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]

Fair Value Inputs, Assets, Quantitative Information [Table Text Block]

			Weighted Average
			(based on fair
Unobservable Quantitative Input		Range	value of investments)
	Discount rates	12.5% to 19.0%	14.4%
	Terminal capitalization rates	5.3% to 6.3%	5.8%

Summary of Changes in Level 3 Plan Assets [Table Text Block]

	Real Estate Investments
	For the Three Months Ended March 31,
(Amounts in thousands)	2013		2012
Beginning balance	$	600,786	$	346,650
Purchases		13,668		-
Sales/Returns		(56,664)		(31,052)
Unrealized gains		13,516		6,844
Other, net		-		2,072
Ending balance	$	571,306	$	324,514

Deferred Compensation Plan Assets [Member]

Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]

Summary of Changes in Level 3 Plan Assets [Table Text Block]

	Deferred Compensation Plan Assets
	For the Three Months Ended March 31,
(Amounts in thousands)	2013		2012
Beginning balance	$	62,631	$	56,221
Purchases		2,707		3,611
Sales		(2,697)		(3,395)
Realized and unrealized gains		1,354		2,392
Other, net		1,015		52
Ending balance	$	65,010	$	58,881

- Definition

Tabular disclosure of the fair value measurement of assets using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes during the period attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets) and gains or losses recognized in other comprehensive income (loss), and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs), by class of asset.

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- Definition

Tabular disclosure of the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments, assets, and liabilities. Such certain disclosures about the financial instruments, assets, and liabilities include: (1) the fair value of the required items together with their carrying amounts (as appropriate) and (2) the methodology and assumptions used in developing such estimates of fair value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 107

-Paragraph 14

-Subparagraph a

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 159

-Paragraph 18

-Subparagraph c(2), d, e, f

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

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-Section 50

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Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 107

-Paragraph 15

-Subparagraph b-d

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 11

-URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13467-108611

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 159

-Paragraph 19

-Subparagraph a, b, c(1), d(1)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

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-URI http://asc.fasb.org/extlink&oid=6447952&loc=d3e13220-108610

Reference 9: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 157

-Paragraph 32

-Subparagraph a, c(1), c(2), c(3), d

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 10: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 107

-Paragraph 10

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 11: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 12

-URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13476-108611

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-Publisher FASB

-Name Accounting Standards Codification

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-URI http://asc.fasb.org/extlink&oid=6957238&loc=d3e14172-108612

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