Segment Reporting - Segment Assets (Details) - USD ($) $ in Thousands |
Dec. 31, 2016 |
Dec. 31, 2015 |
|---|---|---|
| Segment Reporting Information, Additional Information | ||
| Long-Lived Assets | $ 3,679,209 | $ 3,689,002 |
| Assets | 4,698,923 | 4,613,190 |
| Operating Segments | Net Lease | ||
| Segment Reporting Information, Additional Information | ||
| Long-Lived Assets | 3,210,351 | 3,169,885 |
| Assets | 3,905,402 | 3,956,239 |
| Operating Segments | Self-Storage | ||
| Segment Reporting Information, Additional Information | ||
| Long-Lived Assets | 240,095 | 261,273 |
| Assets | 252,195 | 269,081 |
| Operating Segments | All Other | ||
| Segment Reporting Information, Additional Information | ||
| Long-Lived Assets | 228,763 | 257,844 |
| Assets | 266,231 | 309,288 |
| Corporate | ||
| Segment Reporting Information, Additional Information | ||
| Long-Lived Assets | 0 | 0 |
| Assets | $ 275,095 | $ 78,582 |