Fair Value Measurements of Other Financial Instruments (Details) - USD ($) $ in Thousands |
Apr. 30, 2017 |
Oct. 31, 2016 |
|---|---|---|
| Carrying And Fair Value [Line Items] | ||
| Carrying value of loan to affiliate | $ 5,000 | $ 5,000 |
| Carrying value of other investments | 18,985 | 19,034 |
| Carrying value of other assets related to Hexavest option | 6,071 | 6,194 |
| Carrying value of debt | 868,272 | 571,773 |
| Level 2 [Member] | ||
| Carrying And Fair Value [Line Items] | ||
| Fair value of debt | 893,127 | 603,625 |
| Level 3 [Member] | ||
| Carrying And Fair Value [Line Items] | ||
| Fair value of loan to affiliate | 5,000 | 5,000 |
| Fair value of other investments | 18,985 | 19,034 |
| Fair value of other assets related to Hexavest option | $ 4,243 | $ 4,328 |
| Hexavest [Member] | ||
| Carrying And Fair Value [Line Items] | ||
| Additional interest that may be purchased by the Company in future periods | 26.00% | 26.00% |