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Combined Guarantor Subsidiaries - Mortgage and Other Notes Receivable - Summary (Details) - USD ($) | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2020 | Dec. 31, 2019
Mortgage and Other Notes Receivable [Line Items] |  |  |
Balance |  | $ 2,729,000 | $ 4,662,000
Mortgage Receivable |  |  |
Mortgage and Other Notes Receivable [Line Items] |  |  |
Interest Rate (as a percent) |  | 3.48% |
Balance |  | $ 1,100,000 | 2,637,000
Other Notes Receivable |  |  |
Mortgage and Other Notes Receivable [Line Items] |  |  |
Balance |  | 1,629,000 | 2,025,000
Guarantor Subsidiaries |  |  |
Mortgage and Other Notes Receivable [Line Items] |  |  |
Balance |  | 73,786,000 | 75,016,000
Guarantor Subsidiaries | Mortgage Receivable |  |  |
Mortgage and Other Notes Receivable [Line Items] |  |  |
Balance |  | $ 73,786,000 | $ 73,786,000
Guarantor Subsidiaries | Mortgage Receivable | The Promenade |  |  |
Mortgage and Other Notes Receivable [Line Items] |  |  |
Maturity Date | [1] | 2020-12 |
Interest Rate (as a percent) | [1] | 5.00% | 5.00%
Balance | [1] | $ 47,514,000 | $ 47,514,000
Guarantor Subsidiaries | Mortgage Receivable | Hamilton Corner |  |  |
Mortgage and Other Notes Receivable [Line Items] |  |  |
Maturity Date | [1] | 2020-08 |
Interest Rate (as a percent) | [1] | 5.67% | 5.67%
Balance | [1] | $ 14,295,000 | $ 14,295,000
Guarantor Subsidiaries | Mortgage Receivable | The Terrace |  |  |
Mortgage and Other Notes Receivable [Line Items] |  |  |
Maturity Date | [1] | 2020-12 |
Interest Rate (as a percent) | [1] | 7.25% | 7.25%
Balance | [1] | $ 11,977,000 | $ 11,977,000
Guarantor Subsidiaries | Other Notes Receivable |  |  |
Mortgage and Other Notes Receivable [Line Items] |  |  |
Balance |  | $ 73,786,000 | $ 75,016,000
Guarantor Subsidiaries | Other Notes Receivable | Community improvement district |  |  |
Mortgage and Other Notes Receivable [Line Items] |  |  |
Maturity Date |  | 2028-08 |
Interest Rate (as a percent) |  |  | 6.75%
Balance |  |  | $ 1,230,000
[1] | The mortgaged property is owned by an entity that is controlled by the Operating Partnership and included in the Operating Partnership's condensed consolidated financial statements. The mortgage note receivable is interest only.

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- Definition Notes receivable maturity month and year. + References No definition available. + Details
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- Definition 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=120402547&loc=d3e617274-123014 + Details
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- Definition Amount, after allowance for credit loss, of financing receivable. Excludes financing receivable covered under loss sharing agreement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919230-210447 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -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=120391452&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=121593590&loc=d3e4428-111522 + Details
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