Investments - Schedule of Minimum Future Contractual Rent to be Received (Details) $ in Thousands |
Mar. 31, 2017
USD ($)
|
|---|---|
| Operating Leases, Future Contractual Rent Receivable | |
| Remainder of 2017 | $ 460,417 |
| 2018 | 603,955 |
| 2019 | 587,767 |
| 2020 | 569,364 |
| 2021 | 540,081 |
| Thereafter | 4,127,461 |
| Total future minimum rentals | $ 6,889,045 |