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Commitments and Contingencies (Details) (USD $) | 12 Months Ended |  |  | 12 Months Ended |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2013 Lexington Avenue Property [Member] | Dec. 31, 2013 Paramus Property [Member] Tenant Occupant [Member] Ikea [Member] | Dec. 31, 2001 Paramus Property [Member] Tenant Occupant [Member] Ikea [Member] acre | Dec. 31, 2021 Paramus Property [Member] Tenant Occupant [Member] Ikea [Member] Scenario Forecast [Member] | Dec. 31, 2013 Paramus Property [Member] Tenant Occupant [Member] Ikea [Member] Scenario Forecast [Member] | Dec. 31, 2002 Flushing Property [Member] | Nov. 30, 2011 Flushing Property [Member] New World Mall Llc [Member] | Dec. 31, 2013 General Liability [Member] | Dec. 31, 2013 All Risk Property And Rental Value [Member] | Dec. 31, 2013 Terrorism Coverage Including Nbcr [Member] Self Insured [Member] | Dec. 31, 2013 Reinsurance For Terrorism Coverage Excluding Nbcr [Member] Third Party Carriers [Member] | Dec. 31, 2013 NBCR [Member]
Insurance [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgage loans, recourse |  |  |  | $ 75,000,000 |  |  |  |  |  |  |  |  |  |  |
Mortgages payable | 1,049,959,000 | 1,065,916,000 |  | 320,000,000 | 68,000,000 |  |  |  |  |  |  |  |  |  |
Insurance Maximum Coverage Per Incident |  |  |  |  |  |  |  |  |  |  | 300,000,000 | 1,700,000,000 | 1,700,000,000 | 1,700,000,000 |
Deductible |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 275,000
Self Insured Responsibility (in percentage) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 15.00%
Federal Government Responsibility (in percentage) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 85.00%
Flushing Property [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Non-refundable purchase deposit |  |  |  |  |  |  |  |  | 1,875,000 |  |  |  |  |  |
Loss Contingency, Damages Sought, Value |  |  |  |  |  |  |  |  |  | 50,000,000 |  |  |  |  |
Paramus Property [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Area Of Land (in acre) |  |  |  |  |  | 30.3 |  |  |  |  |  |  |  |  |
Property purchase option exercisable be leasee with purchase option in 2021 |  |  |  |  |  |  |  | 75,000,000 |  |  |  |  |  |  |
Mortgages payable | 1,049,959,000 | 1,065,916,000 |  | 320,000,000 | 68,000,000 |  |  |  |  |  |  |  |  |  |
Fixed interest rate on the debt (in percentage) |  |  |  |  | 2.90% |  |  |  |  |  |  |  |  |  |
Triple-net rent, annual amount |  |  |  |  |  |  |  | 700,000 |  |  |  |  |  |  |
Purchase option exercised, proceeds from sale of land |  |  |  |  |  |  |  | 7,000,000 |  |  |  |  |  |  |
Purchase option excercised, gain on sale of land | 0 | 599,628,000 | 0 |  |  |  | 60,000,000 |  |  |  |  |  |  |  |
Purchase option not excercised amount included in triple net rent over remainder of lease |  |  |  |  |  |  | 68,000,000 |  |  |  |  |  |  |  |
Loan Amortization Period |  |  |  |  |  |  | 20 years |  |  |  |  |  |  |  |
Letters Of Credit [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Standby letters of credit, issued and outstanding | $ 3,308,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |

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- Definition The deductible owed by our wholly owned insurance subsidiary in the event of a covered loss + References No definition available. + Details
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- Definition The percentage of the covered portion of a loss above the deductible for which the Federal Government is responsible for covered losses + References No definition available. + Details
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- Definition In the event the tenant does not exercise its purchase option, the period over which the tenant's debt service portion of its rent must be sufficient to fully amortize the loan on the property + References No definition available. + Details
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- Definition Amount of loan that will become recourse in case of a substantial casualty + References No definition available. + Details
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- Definition Lease with purchase option to be exercised by lessee. + References No definition available. + Details
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- Definition The cash inflow from the sale of land held for use in case the purchase option is exercised by leasee. + References No definition available. + Details
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- Definition The amount to be amortized over the remainder of the lease term if the purchase option is not exercised. + References No definition available. + Details
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- Definition The percentage of the covered portion of a loss above the deductible for which our wholly owned insurance subsidiary is responsible for covered losses + References No definition available. + Details
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- Definition Amount of difference between the carrying amount and the sales price of real estate properties sold as part of discontinued operations. + References No definition available. + Details
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- Definition This element represents money paid in advance to protect the provider of a product or service, such as a lessor, against damage or nonpayment by the buyer or tenant (lessee) during the term of the agreement. Such damages may include physical damage to the property, theft of property, and other contractual breaches. Security deposits held may be interest or noninterest bearing. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.15(a)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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