Derivative Instruments (Outstanding Foreign Currency Forward Contracts) (Details) (USD $) In Thousands, unless otherwise specified	Aug. 31, 2014	Nov. 30, 2013
Derivative [Line Items]
Notional Value	$ 35,554	$ 48,499
Total, Fair Value	(231)	171
Forward contracts to sell U.S. dollars [Member]
Derivative [Line Items]
Notional Value	25,458	26,016
Foreign currency derivative contracts to purchase U.S. dollars, Fair Value	35	79
Forward contracts to purchase U.S. dollars [Member]
Derivative [Line Items]
Notional Value	10,096	22,483
Foreign currency derivative contracts to purchase U.S. dollars, Fair Value	$ (266)	$ 92