FAIR VALUE MEASUREMENTS: (Details) - Fair Value, Measurements, Recurring [Member] - USD ($) $ in Thousands |
Feb. 28, 2017 |
Nov. 30, 2016 |
|---|---|---|
| Assets | ||
| Cash equivalents | $ 38,881 | $ 43,043 |
| Available-for-sale securities | 2,079 | 1,883 |
| Forward foreign currency exchange contracts | 901 | 1,700 |
| Liabilities: | ||
| Forward foreign currency exchange contracts | 1,188 | 979 |
| Interest rate swaps | 5,332 | 7,248 |
| Level 1 [Member] | ||
| Assets | ||
| Cash equivalents | 38,881 | 43,043 |
| Available-for-sale securities | 2,079 | 1,883 |
| Level 2 [Member] | ||
| Assets | ||
| Forward foreign currency exchange contracts | 901 | 1,700 |
| Liabilities: | ||
| Forward foreign currency exchange contracts | 1,188 | 979 |
| Interest rate swaps | $ 5,332 | $ 7,248 |