Derivative Instruments (Outstanding Foreign Currency Forward Contracts) (Details) - USD ($) $ in Thousands |
May 31, 2016 |
Nov. 30, 2015 |
|---|---|---|
| Derivative [Line Items] | ||
| Derivative contracts, notional value | $ 90,642 | $ 78,825 |
| Derivative contracts, fair value | (3,649) | (4,021) |
| Short [Member] | Forward Contracts [Member] | ||
| Derivative [Line Items] | ||
| Derivative contracts, notional value | 87,259 | 76,748 |
| Derivative contracts, fair value | (3,644) | (4,026) |
| Long [Member] | Forward Contracts [Member] | ||
| Derivative [Line Items] | ||
| Derivative contracts, notional value | 3,383 | 2,077 |
| Derivative contracts, fair value | $ (5) | $ 5 |