Development and value-add properties owned by the Company

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Gain on casualties and involuntary conversion

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Number of properties impacted by involuntary conversion

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- Definition

Aggregate amount of intangible asset amortization recognized as an adjustment to rental income during the period.

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No definition available.

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The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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The expense recognized in the current period that allocates the cost of a tangible asset used in providing revenue generating services over the asset's useful life.

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Aggregate of the carrying amounts as of the balance sheet date of investments in building and building improvements.

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Amount before accumulated depletion of real estate held for productive use, excluding land held for sale.

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Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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The cumulative amount of depreciation for real estate property held for investment purposes.

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Amount of real estate investment property which may include the following: (1) land available-for-sale; (2) land available-for-development; (3) investments in building and building improvements; (4) tenant allowances; (5) developments in-process; (6) rental properties; and (7) other real estate investments.

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Amount of real estate investment property, net of accumulated depreciation, which may include the following: (1) land available-for-sale; (2) land available-for-development; (3) investments in building and building improvements; (4) tenant allowances; (5) developments in-process; (6) rental properties; and (7) other real estate investments.

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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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Carrying amount as of the balance sheet date of improvements having a life longer than one year that were made for the benefit of one or more tenants.

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REAL ESTATE PROPERTIES (Details)	3 Months Ended		6 Months Ended
REAL ESTATE PROPERTIES (Details)	Jun. 30, 2018 USD ($) Integer	Jun. 30, 2017 USD ($)	Jun. 30, 2018 USD ($)	Jun. 30, 2017 USD ($)	Dec. 31, 2017 USD ($)
Real Estate Properties [Line Items]
Number of properties impacted by involuntary conversion \| Integer	2
Amortization expense for lease intangibles	$ 1,033,000	$ 1,233,000	$ 2,045,000	$ 2,354,000
Depreciation Expense During the Period	18,898,000	17,113,000	36,825,000	33,747,000
Real Estate Properties
Land	368,807,000		368,807,000		$ 345,424,000
Building and building improvements	1,666,438,000		1,666,438,000		1,587,130,000
Tenant and other improvements	422,160,000		422,160,000		404,180,000
Development and value-add properties	211,575,000		211,575,000		242,014,000
Real estate, development and value-add properties	2,668,980,000		2,668,980,000		2,578,748,000
Less accumulated depreciation	(778,676,000)		(778,676,000)		(749,601,000)
Real estate, net	1,890,304,000		1,890,304,000		$ 1,829,147,000
Rental Income Increase Decrease For Amortization Of Acquired In Place Lease Intangibles	(142,000)	$ (141,000)	(260,000)	(277,000)
Gain on casualties and involuntary conversion	$ 1,150,000		$ (1,150,000)	$ 0
Building [Member]
Real Estate Properties [Line Items]
Property, Plant and Equipment, Useful Life			40 years
Minimum [Member] \| Improvements [Member]
Real Estate Properties [Line Items]
Property, Plant and Equipment, Useful Life			3 years
Maximum [Member] \| Improvements [Member]
Real Estate Properties [Line Items]
Property, Plant and Equipment, Useful Life			15 years