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Recent Real Estate Transactions (Disposals of Properties) (Details) |  |  |  | 6 Months Ended |
--- | --- | --- | --- | --- | ---
Apr. 07, 2017 USD ($) | Mar. 31, 2017 USD ($) | Feb. 27, 2017 USD ($) | Jun. 30, 2017 USD ($) Property | Dec. 31, 2016 USD ($)
Real Estate Properties [Line Items] |  |  |  |  |
Mortgage notes issued for property acquired |  |  |  | $ 159,952,064 | $ 158,886,111
Residential Properties [Member] |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Number of properties | Property |  |  |  | 129 |
Residential Properties [Member] | Rangewood Medical Office Building [Member] |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Proceeds from sale of property |  |  | $ 2,200,000 |  |
Gain (loss) on sale of property |  |  | $ (170,000) |  |
Residential Properties [Member] | Regatta Square Retail Center [Member] |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Proceeds from sale of property |  | $ 3,000,000 |  |  |
Gain (loss) on sale of property |  | $ 756,000 |  |  |
Residential Properties [Member] | Shoreline Medical Building [Member] |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Proceeds from sale of property | $ 8,200,000 |  |  |  |
Gain (loss) on sale of property | $ 1,300,000 |  |  |  |
Residential Properties [Member] | Nine Dubose Model Homes [Member] |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Proceeds from sale of property |  |  |  | $ 2,500,000 |
Gain (loss) on sale of property |  |  |  | $ 141,000 |
Number of properties | Property |  |  |  | 9 |
Residential Properties [Member] | Thirty Dubose Model Homes [Member] |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Number of properties | Property |  |  |  | 30 |
Purchase price of property acquired |  |  |  | $ 9,700,000 |
Cash payment for the properties acquired |  |  |  | 7,500,000 |
Mortgage notes issued for property acquired |  |  |  | $ 16,200,000 |

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- Definition Amount recognized as of the acquisition date for the identifiable assets acquired in excess of (less than) the aggregate liabilities assumed. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 55 -Paragraph 37 -URI http://asc.fasb.org/extlink&oid=84160947&loc=d3e2207-128464 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84161108&loc=d3e4845-128472 + Details
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- Definition The difference between the carrying value and the sale price of real estate or properties that were intended to be sold or held for capital appreciation or rental income. This element refers to the gain (loss) included in earnings and not to the cash proceeds of the sale. This element is a noncash adjustment to net income when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 + Details
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- Definition Including the current and noncurrent portions, aggregate carrying amount of all types of notes payable, as of the balance sheet date, with initial maturities beyond one year or beyond the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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- Definition The cash outflow from the acquisition of residential property intended to generate income for the owner. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3213-108585 + Details
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- Definition Cash received for the sale of real estate that is not part of an investing activity during the current period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3179-108585 + Details
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