Intangible Assets and Goodwill (Schedule Of Intangible Assets) (Details) - USD ($) $ in Thousands	Nov. 30, 2016	Nov. 30, 2015
Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross Carrying Amount	$ 192,628	$ 200,083
Intangible Assets, Accumulated Amortization	(111,801)	(85,970)
Total	80,827	114,113
Purchased Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross Carrying Amount	109,886	117,151
Intangible Assets, Accumulated Amortization	(68,116)	(54,963)
Total	41,770	62,188
Customer Related [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross Carrying Amount	67,602	67,602
Intangible Assets, Accumulated Amortization	(35,852)	(25,493)
Total	31,750	42,109
Trademarks and Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross Carrying Amount	15,140	15,330
Intangible Assets, Accumulated Amortization	(7,833)	(5,514)
Total	$ 7,307	$ 9,816