Nature Of Business And Summary Of Significant Accounting Policies (Accumulated Other Comprehensive Loss) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Nov. 30, 2013	Nov. 30, 2012
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, Beginning of Period	$ (10,764)	$ (11,653)
Other comprehensive income (loss) before reclassifications, net of tax	(1,275)	619
Amounts reclassified from accumulated other comprehensive income (loss) to realized losses included in earnings	380	270
Balance, End of Period	(11,659)	(10,764)
Foreign Currency Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, Beginning of Period	(8,183)	(7,545)
Other comprehensive income (loss) before reclassifications, net of tax	(1,066)	(638)
Amounts reclassified from accumulated other comprehensive income (loss) to realized losses included in earnings	0	0
Balance, End of Period	(9,249)	(8,183)
Unrealized Gains (Losses) on Investments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, Beginning of Period	(2,581)	(4,108)
Other comprehensive income (loss) before reclassifications, net of tax	(209)	1,257
Amounts reclassified from accumulated other comprehensive income (loss) to realized losses included in earnings	380	270
Balance, End of Period	$ (2,410)	$ (2,581)