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SCHEDULE IV - MORTGAGE LOANS ON REAL ESTATE - Loans On Real Estate (Details) - USD ($) $ in Thousands | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Mortgage Loans on Real Estate [Line Items] |  |  |  |
Face Amount of Notes Receivable | $ 215,200 |  |  |
Net carrying amount of notes receivable | $ 109,613 | $ 153,829 | $ 276,163 | $ 147,188
First Mortgage Loan, 6.0% Loan, Due 4/30/2020 |  |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |  |
Effective Interest Rate | 6.00% |  |  |
Face Amount of Notes Receivable | $ 15,000 |  |  |
Net carrying amount of notes receivable | $ 17,802 |  |  |
First Mortgage Loan, 8.1% Loan, Due 4/30/2019 |  |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |  |
Effective Interest Rate | 8.10% |  |  |
Face Amount of Notes Receivable | $ 153,400 |  |  |
Net carrying amount of notes receivable | $ 38,673 |  |  |
Zero Coupon Loan Due 5/31/2020 |  |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |  |
Effective Interest Rate | 2.50% |  |  |
Face Amount of Notes Receivable | $ 29,793 |  |  |
Net carrying amount of notes receivable | $ 32,582 |  |  |
Mezzanine Loan 18.0% Loan Due 7/1/2020 |  |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |  |
Effective Interest Rate | 18.00% |  |  |
Face Amount of Notes Receivable | $ 3,007 |  |  |
Net carrying amount of notes receivable | $ 5,306 |  |  |
Preferred Equity, 15.3% Loan, Due 2/3/2021 |  |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |  |
Effective Interest Rate | 15.30% |  |  |
Face Amount of Notes Receivable | $ 14,000 |  |  |
Net carrying amount of notes receivable | $ 15,250 |  |  |

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- Definition Amount of contractual principal due at origination 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 F -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 F)) -URI http://asc.fasb.org/extlink&oid=6589523&loc=d3e617274-123014 + 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=6589523&loc=d3e617274-123014 + Details
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- Definition Amount of 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 FASB -Name Accounting Standards Codification -Topic 948 -SubTopic 310 -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-29(Column G)) -URI http://asc.fasb.org/extlink&oid=6589523&loc=d3e617274-123014 + Details
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