Net Investments in Properties and Real Estate Under Construction - Asset Retirement Obligations (Details) - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
|
| Asset Retirement Obligations | ||
| Beginning balance | $ 25,424 | $ 23,271 |
| Reductions due to dispositions | (10,541) | 0 |
| Additions | 1,888 | 825 |
| Accretion expense | 1,292 | 1,467 |
| Foreign currency translation adjustments and other | (314) | (139) |
| Ending balance | $ 17,749 | $ 25,424 |