Investments - Summary of Owned Real Estate Activity (Footnote) (Details)
$ in Thousands |
3 Months Ended |
|
|
Mar. 31, 2019
USD ($)
Property
|
Dec. 31, 2018
USD ($)
|
| Real Estate [Abstract] |
|
|
| Revenue producing capitalized expenditures |
$ 18,300
|
|
| Capitalized maintenance expenditures |
$ 1,300
|
|
| Number of properties acquired as sales-leaseback transactions | Property |
20
|
|
| Investment amount from sales-leaseback transaction |
$ 147,200
|
|
| Held in Use land and buildings, net of accumulated depreciation |
4,167,515
|
$ 4,136,261
|
| Intangible lease assets, net |
291,095
|
294,463
|
| Real estate assets under direct financing leases, net |
20,320
|
|
| Real estate assets held for sale, net |
94,339
|
18,203
|
| Intangible lease liabilities, net |
(114,805)
|
$ (120,162)
|
| Net balance |
4,458,464
|
|
| Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |
|
|
| Amount of disposition of real estate |
$ 0
|
|
| Deed-In-Lieu Properties |
|
|
| Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |
|
|
| Number of properties disposed | Property |
1
|
|
| Amount of disposition of real estate |
$ 800
|
|
| Held-in-use |
|
|
| Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |
|
|
| Gain (loss) on disposal of assets for properties |
2,800
|
|
| 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 |
$ 5,900
|
|