The amount of land recognized as of the acquisition date.

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- Definition

Length of Time After Project Acquisition When Project Transfers to Real Estate Properties

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Length of Time (in years) After Project Completion When Costs Ceased Being Capitalized

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Percentage of Occupation When Costs Ceased Being Capitalized

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Percentage of Occupation when property transfers from the development and value-add program to real estate properties

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- Definition

Size (in acres) of land acquired

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- Definition

The amount of identifiable intangible assets recognized as of the acquisition date.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition

The amount of property, plant, and equipment recognized as of the acquisition date.

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- Definition

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

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The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

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

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No definition available.

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SIGNIFICANT ACCOUNTING POLICIES (Details 4)	12 Months Ended
SIGNIFICANT ACCOUNTING POLICIES (Details 4)	Dec. 31, 2020 USD ($) Integer	Dec. 31, 2019 USD ($) a	Dec. 31, 2018 USD ($)
Property Acquisitions
Number of Reportable Segments \| Integer	1
Development properties [Member]
Property Acquisitions
Percentage of Occupation when property transfers from the development and value-add program to real estate properties	90.00%
Length of Time After Project Acquisition (for Value-add) or Shell Completion (for Developments) When Project Transfers to Real Estate Properties	1 year
Value-add properties [Member]
Property Acquisitions
Percentage of Occupation when property transfers from the development and value-add program to real estate properties	90.00%
Length of Time After Project Acquisition (for Value-add) or Shell Completion (for Developments) When Project Transfers to Real Estate Properties	1 year
Development and value-add properties [Member]
Property Acquisitions
Percentage of Occupation When Costs Ceased Being Capitalized for development and value-add properties	90.00%
Length of Time After Project Completion When Development Cost Ceased Being Capitalized	1 year
Otay Mesa Land \| Real Estate Properties [Domain]
Property Acquisitions
Size (in acres) of land acquired \| a		41.6
Total cost of properties purchased		$ 15,282,000
Miramar Land [Member] \| Below market lease [Member]
Property Acquisitions
Intangibles acquired associated with purchase of Real Estate		593,000
Miramar Land [Member] \| Land and Land Improvements [Member]
Property Acquisitions
Book value of land based on third party valuations		$ 13,979,000
Miramar Land [Member] \| Real Estate Properties [Domain]
Property Acquisitions
Size (in acres) of land acquired \| a		6.5
Total cost of properties purchased		$ 13,386,000
Yosemite Land \| Real Estate Properties [Domain]
Property Acquisitions
Size (in acres) of land acquired \| a		0.5
Total cost of properties purchased		$ 472,000
2019 Acquisitions [Member]
Property Acquisitions
Total cost of properties purchased		205,841,000
2019 Acquisitions [Member] \| Above Market Leases [Member]
Property Acquisitions
Intangibles acquired associated with purchase of Real Estate		344,000
2019 Acquisitions [Member] \| Leases, Acquired-in-Place [Member]
Property Acquisitions
Intangibles acquired associated with purchase of Real Estate		10,020,000
2019 Acquisitions [Member] \| Below market lease [Member]
Property Acquisitions
Intangibles acquired associated with purchase of Real Estate		2,092,000
2019 Acquisitions [Member] \| Development and value-add properties [Member]
Property Acquisitions
Total amount allocated to real estate properties		92,268,000
2019 Acquisitions [Member] \| Land and Land Improvements [Member]
Property Acquisitions
Book value of land based on third party valuations		46,778,000
2019 Acquisitions [Member] \| Real Estate Properties [Domain]
Property Acquisitions
Total amount allocated to real estate properties		$ 105,301,000
2018 Acquisitions [Member]
Property Acquisitions
Total cost of properties purchased			$ 71,086,000
2018 Acquisitions [Member] \| Above Market Leases [Member]
Property Acquisitions
Intangibles acquired associated with purchase of Real Estate			21,000
2018 Acquisitions [Member] \| Leases, Acquired-in-Place [Member]
Property Acquisitions
Intangibles acquired associated with purchase of Real Estate			4,350,000
2018 Acquisitions [Member] \| Below market lease [Member]
Property Acquisitions
Intangibles acquired associated with purchase of Real Estate			1,756,000
2018 Acquisitions [Member] \| Development and value-add properties [Member]
Property Acquisitions
Total amount allocated to real estate properties			13,934,000
2018 Acquisitions [Member] \| Land and Land Improvements [Member]
Property Acquisitions
Book value of land based on third party valuations			23,263,000
2018 Acquisitions [Member] \| Real Estate Properties [Domain]
Property Acquisitions
Total amount allocated to real estate properties			$ 54,537,000
2020 Acquisitions [Member]
Property Acquisitions
Total cost of properties purchased	$ 76,518,000
2020 Acquisitions [Member] \| Above Market Leases [Member]
Property Acquisitions
Intangibles acquired associated with purchase of Real Estate	104,000
2020 Acquisitions [Member] \| Leases, Acquired-in-Place [Member]
Property Acquisitions
Intangibles acquired associated with purchase of Real Estate	3,257,000
2020 Acquisitions [Member] \| Below market lease [Member]
Property Acquisitions
Intangibles acquired associated with purchase of Real Estate	403,000
2020 Acquisitions [Member] \| Development and value-add properties [Member]
Property Acquisitions
Total amount allocated to real estate properties	27,320,000
2020 Acquisitions [Member] \| Land and Land Improvements [Member]
Property Acquisitions
Book value of land based on third party valuations	23,565,000
2020 Acquisitions [Member] \| Real Estate Properties [Domain]
Property Acquisitions
Total amount allocated to real estate properties	$ 46,240,000