Investments - Summary of Real Estate and Loan Activity (Footnote) (Details)
$ in Thousands |
6 Months Ended |
|
Jun. 30, 2018
USD ($)
Property
|
|---|
| Investments in and Advances to Affiliates, Schedule of Investments [Abstract] |
|
| Revenue producing capitalized expenditures |
$ 17,900
|
| Capitalized maintenance expenditures |
3,400
|
| Accumulated depreciation and amortization associated with dispositions of real estate |
$ 14,300
|
| Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |
|
| Deed-in-lieu properties disposed of | Property |
46
|
| Deed-in-lieu properties disposed of, amount |
$ 79,862
|
| Held-for-use |
|
| Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |
|
| Gain (loss) on disposal of assets for properties |
(2,500)
|
| Held-for-sale |
|
| Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |
|
| Gain (loss) on disposal of assets for properties |
$ 2,700
|
| Deed-In-Lieu Properties |
|
| Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |
|
| Deed-in-lieu properties disposed of | Property |
6
|
| Deed-in-lieu properties disposed of, amount |
$ 28,500
|