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Notes Receivable, Net - Schedule of Notes Receivable (Details) $ in Thousands | Mar. 31, 2018 USD ($) debtinstrument | Dec. 31, 2017 USD ($)
--- | --- | ---
Mortgage Loans on Real Estate [Line Items] |  |
Net carrying amount of notes receivable | $ | $ 108,959 | $ 153,829
Number of instruments held | debtinstrument | 5 |
Core Portfolio |  |
Mortgage Loans on Real Estate [Line Items] |  |
Net carrying amount of notes receivable | $ | $ 56,475 | 101,695
Number of instruments held | debtinstrument | 2 |
Core Portfolio | Minimum |  |
Mortgage Loans on Real Estate [Line Items] |  |
Effective interest rate | 6.00% |
Core Portfolio | Maximum |  |
Mortgage Loans on Real Estate [Line Items] |  |
Effective interest rate | 8.10% |
Fund Portfolio | Fund II |  |
Mortgage Loans on Real Estate [Line Items] |  |
Net carrying amount of notes receivable | $ | $ 31,978 | 31,778
Number of instruments held | debtinstrument | 1 |
Effective interest rate | 2.50% |
Fund Portfolio | Fund III |  |
Mortgage Loans on Real Estate [Line Items] |  |
Net carrying amount of notes receivable | $ | $ 5,256 | 5,106
Number of instruments held | debtinstrument | 1 |
Effective interest rate | 18.00% |
Fund Portfolio | Fund IV |  |
Mortgage Loans on Real Estate [Line Items] |  |
Net carrying amount of notes receivable | $ | $ 15,250 | $ 15,250
Number of instruments held | debtinstrument | 1 |
Effective interest rate | 15.30% |

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- Definition The carrying amount of the outstanding balance due under the mortgage loan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 10 -Section S99 -Paragraph 6 -Subparagraph (SX 210.5-04.(c) Schedule IV) -URI http://asc.fasb.org/extlink&oid=27047687&loc=d3e5864-122674 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 948 -SubTopic 310 -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-29) -URI http://asc.fasb.org/extlink&oid=6589523&loc=d3e617274-123014 + Details
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