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CONSOLIDATED STATEMENTS OF OPERATIONS (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Rental and other property revenues	$ 126,221	$ 119,663	$ 104,188
Property operating expenses	64,091	62,950	54,002
General and administrative	7,691	7,119	6,893
Mortgage and loan interest	66,171	59,362	52,477
Recognition of deferred gains	14,048	0	0
Related Party [Member]
Rental and other property revenues	839	708	726
Property operating expenses	959	900	770
General and administrative	3,225	4,053	3,855
Interest income	16,298	18,864	15,859
Mortgage and loan interest	$ 6,695	$ 5,300	$ 3,774

X

- Definition

Amount of expense incurred and directly related to generating revenue from leased and rented property or equipment.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.2(c))
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The aggregate total of expenses of managing and administering the affairs of an entity, including affiliates of the reporting entity, which are not directly or indirectly associated with the manufacture, sale or creation of a product or product line.

+ References

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Amount of the cost of borrowed funds accounted for as interest expense for debt.

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Amount before accretion (amortization) of purchase discount (premium) of interest income on nonoperating securities.

+ References

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The aggregate revenue from real estate operations during the reporting period.

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The amount of previously reported deferred or unearned revenue that was recognized as revenue during the period. For cash flows, this element primarily pertains to amortization of deferred credits on long-term arrangements. As a noncash item, it is deducted from net income when calculating cash provided by or used in operations using the indirect method.

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