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Subsequent Events - Narrative (Details) - USD ($) | 1 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Oct. 31, 2018 | Sep. 30, 2018 | Dec. 31, 2017
Subsequent Event [Line Items] |  |  |  |
Sales price, gross |  |  | $ 48,500,000 |
Mortgage and other notes receivable | [1] |  | 8,171,000 | $ 8,945,000
Unsecured Term Loan 2 |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Face amount of debt instrument |  |  | $ 350,000,000 |
Variable rate (as a percent) |  |  | 1.75% |
Other | Parkway Plaza | Subsequent Event |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Sales price, gross |  | $ 16,500,000 |  |
Mortgages |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Mortgage and other notes receivable |  |  | $ 5,189,000 | 5,418,000
Mortgages | Village Square |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Mortgage and other notes receivable |  |  | $ 1,554,000 | $ 1,596,000
Construction Loans | Subsequent Event |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Face amount of debt instrument |  | $ 29,400,000 |  |
Term of debt instrument |  | 3 years |  |
Option extension term of debt instrument |  | 1 year |  |
LIBOR | Construction Loans | Subsequent Event |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Variable rate (as a percent) |  | 2.90% |  |
[1] | As of September 30, 2018, includes $621,616 of assets related to consolidated variable interest entities that can be used only to settle obligations of the consolidated variable interest entities and $414,923 of liabilities of consolidated variable interest entities for which creditors do not have recourse to the general credit of the Company. See Note 6.

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- Definition Net amount of the investment in a contractual right to receive money on demand or on fixed or determinable dates that is recognized as an asset in the creditor's statement of financial position. Examples include, but are not limited to, credit card receivables, notes receivable and receivables relating to lessor's rights to payments from leases other than operating leases that have been recorded as assets. Excludes trade accounts receivable with contractual maturity of one year or less and arose from the sale of goods or services. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.3) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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