Fair Value Measurements (Nonrecurring Measurments) (Details) (USD $)	12 Months Ended							3 Months Ended	12 Months Ended
	Nov. 30, 2013	Nov. 30, 2012	Nov. 30, 2011	Nov. 30, 2012 Nonrecurring [Member]	Nov. 30, 2012 Level 1 [Member] Nonrecurring [Member]	Nov. 30, 2012 Level 2 [Member] Nonrecurring [Member]	Nov. 30, 2012 Level 3 [Member] Nonrecurring [Member]	Nov. 30, 2012 Artix, Orbacus and Orbix [Member]	Nov. 30, 2012 Artix, Orbacus and Orbix [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets held for sale	$ 0	$ 68,029,000		$ 16,487,000	$ 0	$ 16,487,000	$ 0	$ 21,774,000	$ 21,774,000
Impairment loss on assets held for sale	0	8,601,000	0					8,600,000	8,601,000
Assets held for sale, at fair value								16,500,000	16,500,000
Assets held for sale, at carrying value								$ 25,100,000	$ 25,100,000