Income Taxes (Reconciliation of The U.S. Federal Statutory Rate to The Effective Tax Rate) (Details) - USD ($) $ in Thousands	12 Months Ended
Nov. 30, 2019	Nov. 30, 2018	Nov. 30, 2017
Income Tax Disclosure [Abstract]
Tax at U.S. Federal statutory rate	$ 5,984	$ 13,513	$ 18,362
Foreign rate differences	(2,619)	1,281	4,793
Effects of foreign operations included in U.S. Federal provision	451	550	(186)
State income taxes, net	(918)	1,180	1,349
Research credits	(1,086)	(302)	(251)
Domestic production activities deduction	(248)	(1,283)	(2,670)
Tax-exempt interest	(27)	(66)	(101)
Nondeductible stock-based compensation	1,043	502	808
Meals and entertainment	198	192	276
Compensation subject to 162(m)	422	227	208
Uncertain tax positions and tax settlements	(720)	(1,626)	429
Remeasurement of net deferred tax liabilities due to the Act	0	(1,660)	0
Net excess tax benefit or detriment from stock-based compensation plans	(103)	(861)	0
Global intangible low tax inclusion	2,100	0	0
Foreign derived intangible deduction	(2,300)	0	0
Other	(82)	(521)	425
Total	$ 2,095	$ 11,126	$ 23,442

Effective Income Tax Rate Reconciliation, Foreign Earnings Included In Domestic Provision, Amount

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to income (loss) exempt from income taxes.

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