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Bonds Payable - Schedule of Long-term Debt Instruments (Details) $ in Thousands |  | 12 Months Ended
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Nov. 30, 2020 USD ($) | Dec. 31, 2020 USD ($) ft² | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($)
Debt Instrument [Line Items] |  |  |  |
Bonds |  | $ 245,988 | $ 232,989 |
Bonds payable |  | 237,888 | 223,265 |
Proceeds from mortgages, other notes and bonds |  | $ 10,942 | 25,675 | $ 123,345
Browning Place |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Land collateral (acres) | ft² |  | 625,297 |  |
Bonds |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Less unamortized deferred issuance costs |  | $ (8,100) | (9,724) |
Series A Bonds |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Bonds | $ 19,693 | $ 95,133 | 92,653 |
Interest Rate |  | 7.30% |  |
Proceeds from mortgages, other notes and bonds | $ 18,822 |  |  |
Series B Bonds |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Bonds |  | $ 65,318 | 60,764 |
Interest Rate |  | 6.80% |  |
Series C Bonds |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Bonds |  | $ 85,537 | $ 79,572 |
Interest Rate |  | 4.65% |  |

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- Definition Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs. + 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 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28555-108399 + Details
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