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Notes Receivable, Net - Narrative (Details) $ in Thousands | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Mar. 31, 2017 USD ($) | Mar. 31, 2016 USD ($) | Dec. 31, 2016 USD ($) note_receivable property | Jun. 30, 2017 USD ($)
Mortgage Loans on Real Estate [Line Items] |  |  |  |
Additional advance | $ 93,044 | $ 1,945 |  |
Notes receivable, net | 276,507 |  | $ 276,163 |
Proceeds from notes receivable | 0 | $ 20,500 |  |
Nonperforming Financial Instruments [Member] |  |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |  |
Notes receivable, net | 12,000 |  | 12,000 |
Notes Receivable [Member] | Collateralized Note, 9.8% Interest Rate [Member] |  |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |  |
Notes receivable, net |  |  | $ 47,500 |
Effective interest rate |  |  | 9.80% |
Number of properties collateralized | property |  |  | 4 |
Notes Receivable [Member] | Five Notes Issued in Periods Prior to 2016 [Member] |  |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |  |
Notes receivable, net |  |  | $ 29,600 |
Proceeds from notes receivable |  |  | $ 42,800 |
Number of notes repaid | note_receivable |  |  | 5 |
Notes Receivable [Member] | First Mortgage Loan, 8.1% Loan, Due 2019 [Member] |  |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |  |
Notes receivable, net |  |  | $ 153,400 |
Effective interest rate |  |  | 8.10% |
Mezzanine Loan [Member] | Mezzanine Loan, 15% Loan [Member] |  |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |  |
Notes receivable, net |  |  | $ 30,900 |
Effective interest rate |  |  | 15.00% |
Fund III [Member] |  |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |  |
Additional advance | 200 |  |  |
Notes receivable, net | $ 4,656 |  | $ 4,506 |
Effective interest rate | 18.00% |  |  |
Fund II [Member] |  |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |  |
Increase in accrued interest | $ 200 |  |  |
Notes receivable, net | $ 31,201 |  | 31,007 |
Effective interest rate | 2.50% |  |  |
Core Portfolio [Member] |  |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |  |
Notes receivable, net | $ 216,400 |  | $ 216,400 |
Core Portfolio [Member] | Notes Receivable [Member] | Collateralized Note, 9.8% Interest Rate [Member] |  |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |  |
Number of receivables issued | note_receivable |  |  | 1 |
Fund IV [Member] |  |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |  |
Notes receivable, net | $ 24,250 |  | $ 24,250 |
Fund IV [Member] | Notes Receivable [Member] | Collateralized Note, 9.8% Interest Rate [Member] |  |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |  |
Number of receivables issued | note_receivable |  |  | 3 |
Scenario, Forecast [Member] |  |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |  |
Anticipated receivable on mortgage loan |  |  |  | $ 2,200

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- Definition The increase (decrease) during the reporting period in the amount due from borrowers for interest payments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585 + Details
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