Income Taxes (Reconciliation Of The U.S. Federal Statutory Rate To The Effective Tax Rate) (Details) - USD ($) $ in Thousands	12 Months Ended
	Nov. 30, 2015	Nov. 30, 2014	Nov. 30, 2013
Income Tax Disclosure [Abstract]
Tax at U.S. Federal statutory rate	$ 4,324	$ 27,231	$ 21,972
Foreign rate differences	16,945	1,320	932
Effects of foreign operations included in U.S. Federal provision	(996)	(1,821)	(427)
State income taxes, net	1,029	1,227	1,357
Research credits	(681)	(80)	(950)
Domestic production activities deduction	(1,750)	(1,095)	(1,323)
Tax-exempt interest	(51)	(80)	(129)
Nondeductible stock-based compensation	1,875	2,152	1,464
Meals and entertainment	321	220	201
Compensation subject to 162(m)	228	350	0
Uncertain tax positions and tax settlements	(332)	(123)	633
Other	243	(955)	(724)
Total	$ 21,155	$ 28,346	$ 23,006