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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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Amount of the effect of a change in accounting principle on operating profit or loss.

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Amount of required minimum rental payments for leases having an initial or remaining non-cancelable letter-terms in excess of one year.

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The cumulative amount of the reporting entity's undistributed earnings or deficit.

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Accounting Guidance Not Yet Effective) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($) lease	Jan. 01, 2018 USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Number of ground lease arrangements as a lessee (lease) \| lease		13
Future contractual lease payments		$ 15,113
Accounting Standards Update 2017-05, Unconsolidated Affiliate Impact \| Scenario, Forecast
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Anticipated gains recorded with adoption of new accounting standard	$ 57,850
Accounting Standards Update 2017-05, Joint Venture Impact \| Scenario, Forecast
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Anticipated gains recorded with adoption of new accounting standard	$ 902
Difference between Revenue Guidance in Effect before and after Topic 606 \| Revenues within the scope of ASC 606 \| Pro Forma
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New accounting standard anticipated impact on retained earnings			$ 362
Sales Revenue, Net, Accounting Standards Update 2014-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Concentration risk, percent of total revenue		100.00%
Leasing revenues \| Sales Revenue, Net, Accounting Standards Update 2014-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Concentration risk, percent of total revenue		97.00%
Revenues within the scope of ASC 606 \| Sales Revenue, Net, Accounting Standards Update 2014-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Concentration risk, percent of total revenue		2.00%
Other revenues \| Sales Revenue, Net, Accounting Standards Update 2014-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Concentration risk, percent of total revenue		1.00%