Derivative Instruments (Outstanding Foreign Currency Forward Contracts) (Details) - USD ($) $ in Thousands	Feb. 29, 2016	Nov. 30, 2015
Derivative [Line Items]
Derivative contracts, notional value	$ 83,640	$ 78,825
Derivative contracts, fair value	(5,100)	(4,021)
Forward contracts to sell U.S. dollars [Member]
Derivative [Line Items]
Derivative contracts, notional value	81,146	76,748
Derivative contracts, fair value	(5,119)	(4,026)
Forward contracts to purchase U.S. dollars [Member]
Derivative [Line Items]
Derivative contracts, notional value	2,494	2,077
Derivative contracts, fair value	$ 19	$ 5

Fair value of the assets less the liabilities of a derivative or group of derivatives.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 45
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41271-113958

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41228-113958

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13433-108611

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13495-108611

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