Nature of Business and Summary of Significant Accounting Policies (Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Thousands		12 Months Ended
		Nov. 30, 2019		Nov. 30, 2018		Nov. 30, 2017
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning of year	[2]	$ 324,002	[1]	$ 404,381		$ 442,729
Other comprehensive income (loss), net of tax		(1,798)		(9,770)	[3]	10,155	[3]
Balance, end of year		330,282		324,002	[1],[2]	404,381	[2]
Total
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning of year	[2]	(28,176)		(18,406)		(28,561)
Other comprehensive income (loss), net of tax		(1,798)		(9,770)		10,155
Balance, end of year		(29,974)		(28,176)	[2]	(18,406)	[2]
Foreign Currency Translation Adjustment
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning of year		(27,973)		(18,177)
Other comprehensive income (loss), net of tax		(420)		(9,796)
Balance, end of year		(28,393)		(27,973)		(18,177)
Unrealized (Losses) Gains on Investments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning of year		(203)		(229)
Other comprehensive income (loss), net of tax		173		26
Balance, end of year		(30)		(203)		(229)
Unrealized Loss on Hedging Activity
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning of year				0
Other comprehensive income (loss), net of tax				0
Balance, end of year						$ 0
Unrealized Loss on Hedging Activity
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning of year		0
Other comprehensive income (loss), net of tax		(1,551)
Balance, end of year		$ (1,551)		$ 0

[1] The Company adopted the accounting standard related to revenue recognition ("ASC 606") effective December 1, 2018 using the full retrospective method. See Note 1. Nature of Business and Summary of Significant Accounting Policies for further information.

[2] The Company adopted the accounting standard related to revenue recognition ("ASC 606") effective December 1, 2018 using the full retrospective method. See Note 1. Nature of Business and Summary of Significant Accounting Policies for further information.

[3] The Company adopted the accounting standard related to revenue recognition ("ASC 606") effective December 1, 2018 using the full retrospective method. See Note 1. Nature of Business and Summary of Significant Accounting Policies for further information.