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Concentration of Credit Risk (Details) ft² in Millions	Jun. 30, 2019 a ft² property
Northern New Jersey/New York City
Real Estate Properties [Line Items]
Percentage accounted by properties of its annualized base rent	28.50%
Los Angeles
Real Estate Properties [Line Items]
Percentage accounted by properties of its annualized base rent	16.30%
Office building | Northern New Jersey/New York City
Real Estate Properties [Line Items]
Number of buildings	59
Area of real estate property | ft²	3.3
Office building | Los Angeles
Real Estate Properties [Line Items]
Number of buildings	35
Area of real estate property | ft²	2.4
Land parcels | Northern New Jersey/New York City
Real Estate Properties [Line Items]
Number of buildings	8
Area of real estate property | a	46.7
Land parcels | Los Angeles
Real Estate Properties [Line Items]
Number of buildings	5
Area of real estate property | a	10.1

X

- Definition

Percentage accounted by properties of its annualized base rent.

+ References

No definition available.

+ Details

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X

- Definition

Area of a real estate property.

+ References

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+ Details

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X

- Definition

The number of real estate properties owned as of the balance sheet date.

+ References

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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.

+ Details

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- Details

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X

- Details

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X

- Details

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X

- Details

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