Nature of Business and Summary of Significant Accounting Policies (Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
Nov. 30, 2018	Nov. 30, 2017	Nov. 30, 2016
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning of year	$ 376,084	$ 406,629	$ 522,464
Other comprehensive income (loss) before reclassifications	(9,214)	9,562
Total other comprehensive (loss) income, net of tax	(9,214)	9,562	(3,933)
Balance, end of year	310,082	376,084	406,629
Foreign Currency Translation Adjustment
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning of year	(18,770)	(28,425)
Other comprehensive income (loss) before reclassifications	(9,240)	9,655
Total other comprehensive (loss) income, net of tax	(9,240)	9,655
Balance, end of year	(28,010)	(18,770)	(28,425)
Unrealized (Losses) Gains on Investments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning of year	(229)	(136)
Other comprehensive income (loss) before reclassifications	26	(93)
Total other comprehensive (loss) income, net of tax	26	(93)
Balance, end of year	(203)	(229)	(136)
Total
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning of year	(18,999)	(28,561)	(24,628)
Total other comprehensive (loss) income, net of tax	(9,214)	9,562	(3,933)
Balance, end of year	$ (28,213)	$ (18,999)	$ (28,561)

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Amount before tax and reclassification adjustments of other comprehensive income (loss) attributable to parent.

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Amount after tax of other comprehensive income (loss) attributable to parent entity.

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Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

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