Nature of Business and Summary of Significant Accounting Policies (Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Nov. 30, 2021	Nov. 30, 2020	Nov. 30, 2019
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning of year	$ 346,013	$ 330,282	$ 324,002
Other comprehensive loss	335	(2,804)	(1,798)
Balance, end of year	412,489	346,013	330,282
Total
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning of year	(32,778)	(29,974)	(28,176)
Other comprehensive loss	335	(2,804)	(1,798)
Balance, end of year	(32,443)	(32,778)	(29,974)
Foreign Currency Translation Adjustment
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning of year	(27,616)	(28,393)
Other comprehensive loss	(2,439)	777
Balance, end of year	(30,055)	(27,616)	(28,393)
Unrealized (Losses) Gains on Investments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning of year	14	(30)
Other comprehensive loss	(63)	44
Balance, end of year	(49)	14	(30)
Unrealized Losses on Hedging Activity
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning of year	(5,176)	(1,551)
Other comprehensive loss	2,837	(3,625)
Balance, end of year	$ (2,339)	$ (5,176)	$ (1,551)