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SIGNIFICANT ACCOUNTING POLICIES - Purchase Accounting for Acquisition of Real Estate, Escrows, Depreciation and Amortization (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Purchase Accounting for Acquisition of Real Estate
Real estate acquisition costs			$ 596,000
Estimated useful lives of intangible assets, minimum	1 year
Estimated useful lives of building and intangible assets, maximum	37 years
Escrows
Real estate taxes, insurance and other escrows	$ 423,000	$ 460,000
Depreciation and Amortization
Depreciation and amortization	$ 24,155,000	$ 20,993,000	$ 18,164,000
Buildings
Depreciation and Amortization
Estimated useful life	40 years

X

- Definition

The cost of property acquired.

+ References

No definition available.

+ Details

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Balance Type:	debit
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- Definition

Minimum useful life of finite-lived intangible assets or liabilities used in the normal conduct of business and not intended for resale.

+ References

No definition available.

+ Details

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- Definition

Maximum useful life of finite-lived intangible assets and long lived, physical assets used in the normal conduct of business and not intended for resale.

+ References

No definition available.

+ Details

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X

- Definition

Represents the amounts related to Real estate taxes, insurance and other escrows related to real estate in escrow, deposits and other assets and receivables.

+ References

No definition available.

+ Details

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- Definition

The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585

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- References

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- Definition

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.

+ References

No definition available.

+ Details

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- References

No definition available.

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- References

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- Details

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