Supplemental Cash Flow Information - Schedule of Supplemental Cash Flow Disclosures (Details) - USD ($) $ in Thousands |
3 Months Ended | |
|---|---|---|
Mar. 31, 2017 |
Mar. 31, 2016 |
|
| Supplemental Cash Flow Elements [Abstract] | ||
| Reduction of debt in exchange for collateral assets | $ 35,522 | $ 13,631 |
| Reclass of residual value on expired deferred financing lease to operating asset | 8,613 | 0 |
| Net real estate and other collateral assets surrendered | 35,008 | 19,942 |
| Accrued interest capitalized to principal (1) | 714 | 1,260 |
| Accrued performance share dividend rights | 414 | 174 |
| Distributions declared and unpaid | 87,864 | 77,899 |
| Accrued deferred financing costs | $ 74 | $ 125 |