v3.7.0.1
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