Related Party Transactions - Additional Information (Detail) ft² in Thousands	6 Months Ended	12 Months Ended
Jun. 30, 2019 USD ($) $ / ft²	Dec. 31, 2018 USD ($) ft²
Rego Park II \| Retail Space \| Toys R Us
Related Party Transaction [Line Items]
Area of property (in sqft.) \| ft²		47
Annual revenue from leased property		$ 2,600,000
Vornado
Related Party Transaction [Line Items]
Noncontrolling interest, ownership percentage by noncontrolling owners	32.40%
Management fee agreement value	$ 2,800,000
Vornado \| Toys R Us
Related Party Transaction [Line Items]
Noncontrolling interest, ownership percentage by parent		32.50%
Vornado \| Property management, cleaning, engineering and security fees \| 731 Lexington Avenue \| Office and Retail Space
Related Party Transaction [Line Items]
Property management fee agreement, price per square foot \| $ / ft²	0.50
Vornado \| Property management, cleaning, engineering and security fees \| 731 Lexington Avenue \| Common Area
Related Party Transaction [Line Items]
Property management fee agreement value	$ 324,000
Property management fee escalation percentage per annum	3.00%
Vornado \| Property management, cleaning, engineering and security fees \| Rego Park II \| Retail Space
Related Party Transaction [Line Items]
Property management fee agreement percentage of income	2.00%
Vornado \| Leasing fees
Related Party Transaction [Line Items]
Lease fee percentage of rent one to ten years	3.00%
Lease fee percentage of rent eleven to twenty years	2.00%
Lease fee percentage of rent twenty first to thirty years	1.00%
Percentage increase lease fee if broker used	1.00%
Percentage commissions on sale of assets under fifty million	3.00%
Asset sale commission threshold	$ 50,000,000
Percentage commissions on sale of assets over fifty million	1.00%
Amount Due to / (Fees paid to) related party	$ (2,448,000)	$ (13,000)
Vornado \| Development fees
Related Party Transaction [Line Items]
Development fee as percentage of development costs	6.00%
Amount Due to / (Fees paid to) related party	$ (175,000)	(146,000)
Vornado \| Management, Property Management, Cleaning, Engineering and Security Fees
Related Party Transaction [Line Items]
Amount Due to / (Fees paid to) related party	$ (793,000)	$ (549,000)

Annual revenue attributable to tenant.

No definition available.

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- Definition

Asset sale commission threshold.

+ References

No definition available.

+ Details

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- Definition

Percentage of development costs that the related party will receive as per the Development agreement.

+ References

No definition available.

+ Details

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- Definition

Percentage of rent payable to related party for leasing services for the eleventh through twentieth years of the lease.

+ References

No definition available.

+ Details

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- Definition

Percentage of rent payable to related party for leasing services for the first ten years of the lease.

+ References

No definition available.

+ Details

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- Definition

Percentage of rent payable to related party for leasing services for the twenty-first through thirtieth years of the lease.

+ References

No definition available.

+ Details

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- Definition

The amount of management fee paid to related party to manage corporate activities.

+ References

No definition available.

+ Details

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- Definition

Percentage of gross proceeds over $50,000,000 from the sale of any assets, payable to related party.

+ References

No definition available.

+ Details

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- Definition

Percentage of gross proceeds under $50,000,000 from the sale of any assets, payable to related party.

+ References

No definition available.

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- Definition

Percentage of increase in leasing services payable to related party if a real estate broker is used

+ References

No definition available.

+ Details

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- Definition

Property Management Fee Agreement, Price Per Square Foot

+ References

No definition available.

+ Details

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- Definition

Annual amount paid to related party as property management fees.

+ References

No definition available.

+ Details

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- Definition

Annual increase in the amount paid to related party as property management fees.

+ References

No definition available.

+ Details

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- Definition

Area of a real estate property.

+ References

No definition available.

+ Details

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- Definition

The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity.

+ References

No definition available.

+ Details

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- Definition

The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

+ References

No definition available.

+ Details

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- Definition

The percentage charged for managing real estate properties.

+ References

No definition available.

+ Details

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- Definition

Receivables to be collected from (obligations owed to) related parties, net as of the balance sheet date where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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