Commitments and Contingencies	6 Months Ended
Jun. 30, 2015
Commitments and Contingencies [Abstract]
Commitments and Contingencies [Text Block]	11. Commitments and Contingencies Insurance We maintain general liability insurance with limits of $300,000,000 per occurrence and all-risk property and rental value insurance coverage with limits of $1.7 billion per occurrence, including coverage for acts of terrorism, with sub-limits for certain perils such as floods and earthquakes on each of our properties. Fifty Ninth Street Insurance Company, LLC (“FNSIC”), our wholly owned consolidated subsidiary, acts as a direct insurer for coverage for acts of terrorism, including nuclear, biological, chemical and radiological (“NBCR”) acts, as defined by the Terrorism Risk Insurance Program Reauthorization Act, which expires in December 2020. Coverage for acts of terrorism (including NBCR acts) is up to $1.7 billion per occurrence and in the aggregate. Coverage for acts of terrorism (excluding NBCR acts) is fully reinsured by third party insurance companies with no exposure to FNSIC. For NBCR acts, FNSIC is responsible for a $275,000 deductible and 15% of the balance (16% effective January 1, 2016) of a covered loss, and the Federal government is responsible for the remaining 85% (84% effective January 1, 2016) of a covered loss. We are ultimately responsible for any loss incurred by FNSIC. We continue to monitor the state of the insurance market and the scope and costs of coverage for acts of terrorism. However, we cannot anticipate what coverage will be available on commercially reasonable terms in the future. We are responsible for deductibles and losses in excess of our insurance coverage, which could be material. Our mortgage loans are non-recourse to us, except for $75,000,000 of the $320,000,000 mortgage on the retail portion of our 731 Lexington Avenue property, in the event of a substantial casualty, as defined. Our mortgage loans contain customary covenants requiring us to maintain insurance. Although we believe that we have adequate insurance coverage for purposes of these agreements, we may not be able to obtain an equivalent amount of coverage at reasonable costs in the future. If lenders insist on greater coverage than we are able to obtain, it could adversely affect our ability to finance our properties. Rego Park I Litigation On June 24, 2014, Sears Roebuck and Co. (“Sears”) filed a lawsuit in the Supreme Court of the State of New York against Vornado and us (and certain of our subsidiaries) with regard to space that Sears leases at our Rego Park I property. Sears alleges that the defendants are liable for harm that Sears has suffered as a result of (a) water intrusions into the premises, (b) two fires in February 2014 that caused damages to those premises, and (c) alleged violations of the Americans with Disabilities Act in the premises' parking garage. Sears asserts various causes of actions for damages and seeks to compel compliance with landlord's obligations to repair the premises and to provide security, and to compel us to abate a nuisance that Sears claims was a cause of the water intrusions into its premises. In addition to injunctive relief, Sears seeks, among other things, damages of not less than $4 million and future damages it estimates will not be less than $25 million. We intend to defend the claims vigorously. The amount or range of reasonably possible losses, if any, cannot be estimated. Rego Park II Apartment Tower We are constructing an apartment tower above our Rego Park II shopping center, containing 312 units aggregating 255,000 square feet. The estimated cost of this project is approximately $125,000,000, of which $103,307,000 has been incurred as of June 30, 2015. In July 2015, we received TCOs for certain floors of the Rego Park II apartment tower where construction has been substantially completed. Construction of the remaining floors is expected to be substantially completed during 2015 and the related TCOs are expected to be obtained by December 31, 2015. Paramus In 2001, we leased 30.3 acres of land located in Paramus, New Jersey to IKEA Property, Inc. The lease has a purchase option in 2021 for $75,000,000. The property is encumbered by a $68,000,000 interest-only mortgage loan with a fixed rate of 2.90%, which matures in October 2018. The annual triple-net rent is the sum of $700,000 plus the amount of debt service on the mortgage loan. If the purchase option is exercised, we will receive net cash proceeds of approximately $7,000,000 and recognize a gain on sale of land of approximately $60,000,000. If the purchase option is not exercised, the triple-net rent for the last 20 years would include debt service sufficient to fully amortize $68,000,000 over the remaining 20-year lease term. Letters of Credit Approximately $2,074,000 of standby letters of credit were outstanding as of June 30, 2015. Other There are various other legal actions against us in the ordinary course of business. In our opinion, the outcome of such matters in the aggregate will not have a material effect on our financial position, results of operations or cash flows.

Commitments and Contingencies

6 Months Ended

Jun. 30, 2015

Commitments and Contingencies [Abstract]

Commitments and Contingencies [Text Block]

11. Commitments and Contingencies

Insurance

We maintain general liability insurance with limits of $300,000,000 per occurrence and all-risk property and rental value insurance coverage with limits of $1.7 billion per occurrence, including coverage for acts of terrorism, with sub-limits for certain perils such as floods and earthquakes on each of our properties.

Fifty Ninth Street Insurance Company, LLC (“FNSIC”), our wholly owned consolidated subsidiary, acts as a direct insurer for coverage for acts of terrorism, including nuclear, biological, chemical and radiological (“NBCR”) acts, as defined by the Terrorism Risk Insurance Program Reauthorization Act, which expires in December 2020. Coverage for acts of terrorism (including NBCR acts) is up to $1.7 billion per occurrence and in the aggregate. Coverage for acts of terrorism (excluding NBCR acts) is fully reinsured by third party insurance companies with no exposure to FNSIC. For NBCR acts, FNSIC is responsible for a $275,000 deductible and 15% of the balance (16% effective January 1, 2016) of a covered loss, and the Federal government is responsible for the remaining 85% (84% effective January 1, 2016) of a covered loss. We are ultimately responsible for any loss incurred by FNSIC.

We continue to monitor the state of the insurance market and the scope and costs of coverage for acts of terrorism. However, we cannot anticipate what coverage will be available on commercially reasonable terms in the future. We are responsible for deductibles and losses in excess of our insurance coverage, which could be material.

Our mortgage loans are non-recourse to us, except for $75,000,000 of the $320,000,000 mortgage on the retail portion of our 731 Lexington Avenue property, in the event of a substantial casualty, as defined. Our mortgage loans contain customary covenants requiring us to maintain insurance. Although we believe that we have adequate insurance coverage for purposes of these agreements, we may not be able to obtain an equivalent amount of coverage at reasonable costs in the future. If lenders insist on greater coverage than we are able to obtain, it could adversely affect our ability to finance our properties.

Rego Park I Litigation

On June 24, 2014, Sears Roebuck and Co. (“Sears”) filed a lawsuit in the Supreme Court of the State of New York against Vornado and us (and certain of our subsidiaries) with regard to space that Sears leases at our Rego Park I property. Sears alleges that the defendants are liable for harm that Sears has suffered as a result of (a) water intrusions into the premises, (b) two fires in February 2014 that caused damages to those premises, and (c) alleged violations of the Americans with Disabilities Act in the premises' parking garage. Sears asserts various causes of actions for damages and seeks to compel compliance with landlord's obligations to repair the premises and to provide security, and to compel us to abate a nuisance that Sears claims was a cause of the water intrusions into its premises. In addition to injunctive relief, Sears seeks, among other things, damages of not less than $4 million and future damages it estimates will not be less than $25 million. We intend to defend the claims vigorously. The amount or range of reasonably possible losses, if any, cannot be estimated.

Rego Park II Apartment Tower

We are constructing an apartment tower above our Rego Park II shopping center, containing 312 units aggregating 255,000 square feet. The estimated cost of this project is approximately $125,000,000, of which $103,307,000 has been incurred as of June 30, 2015. In July 2015, we received TCOs for certain floors of the Rego Park II apartment tower where construction has been substantially completed. Construction of the remaining floors is expected to be substantially completed during 2015 and the related TCOs are expected to be obtained by December 31, 2015.

Paramus

In 2001, we leased 30.3 acres of land located in Paramus, New Jersey to IKEA Property, Inc. The lease has a purchase option in 2021 for $75,000,000. The property is encumbered by a $68,000,000 interest-only mortgage loan with a fixed rate of 2.90%, which matures in October 2018. The annual triple-net rent is the sum of $700,000 plus the amount of debt service on the mortgage loan. If the purchase option is exercised, we will receive net cash proceeds of approximately $7,000,000 and recognize a gain on sale of land of approximately $60,000,000. If the purchase option is not exercised, the triple-net rent for the last 20 years would include debt service sufficient to fully amortize $68,000,000 over the remaining 20-year lease term.

Letters of Credit

Approximately $2,074,000 of standby letters of credit were outstanding as of June 30, 2015.

Other

There are various other legal actions against us in the ordinary course of business. In our opinion, the outcome of such matters in the aggregate will not have a material effect on our financial position, results of operations or cash flows.