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Real Estate Investments - Mortgage Loans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Mortgage Loans
Originations and fundings under mortgage loans receivable	$ 21,364	$ 11,913	$ 20,685
Pay-offs received	(1,086)	(16,665)	(6,036)
Scheduled principal payments received	(1,050)	(1,198)	(2,242)
Mortgage loan (premiums)	(4)	(4)	(10)
(Provision for)/ recovery of loan loss reserve	(192)	60	(125)
Net increase (decrease) in mortgage loans receivable	$ 19,032	$ (5,894)	$ 12,272
Mortgage Loans
Mortgage Loans
General amortization schedule of mortgage loans	30 years
Mortgage Loans | Minimum
Mortgage Loans
Interest rate for mortgage loan (as a percent)	9.20%
General amortization schedule of mortgage loans	30 years
Mortgage Loans | Maximum
Mortgage Loans
Interest rate for mortgage loan (as a percent)	9.70%
Specified basis points for annual increase in interest rate (as a percent)	0.0225%

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The increase (decrease) during the reporting period in the value of mortgage loans.

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Mortgage loan related to the bank premiums.

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Represents the amortization period of mortgage loan on real estate properties.

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The amount of scheduled principal collected on mortgage loans on real estate during the reporting period. Excludes mortgage payoffs.

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Represents the basis points specified for an increase in annual interest rate on mortgage loan receivable.

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Total amount of new mortgage loans and other additions on real estate during the reporting period.

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- Definition

Represents the proceeds received from the early payoff of a mortgage loan.

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The Amount of expense related to loss recovery from loan and loss of reserve

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Interest rate of mortgage loan within investment in mortgage loan on real estate by entity with substantial portion of business acquiring and holding investment real estate or interest in real estate.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 12
-Paragraph Column B
-Subsection 29

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 948
-SubTopic 310
-Section S99
-Paragraph 1
-Subparagraph (SX 210.12-29(Column B))
-URI http://asc.fasb.org/extlink&oid=6589523&loc=d3e617274-123014

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