Condensed Consolidated Statements of Shareholders’ Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Loss
Beginning balance (in shares) at Nov. 30, 2019		45,037,000
Beginning balance at Nov. 30, 2019	$ 330,282	$ 450	$ 295,503	$ 64,303	$ (29,974)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of stock under employee stock purchase plan (in shares)		178,000
Issuance of stock under employee stock purchase plan	4,986	$ 2	4,984
Exercise of stock options (in shares)		115,000
Exercise of stock options	3,607	$ 1	3,606
Vesting of restricted stock units and release of deferred stock units (in shares)		197,000
Vesting of restricted stock units and release of deferred stock units	0	$ 2	(2)
Withholding tax payments related to net issuance of RSUs	(4,072)		(4,072)
Stock-based compensation	17,359		17,359
Dividends declared	$ (22,430)			(22,430)
Treasury stock repurchases and retirements (in shares)	(400,000)	(426,000)
Treasury stock repurchases and retirements	$ (20,000)	$ (4)	(6,487)	(13,509)
Net income	62,061			62,061
Other comprehensive income (loss)	(3,627)				(3,627)
Ending balance (in shares) at Aug. 31, 2020		45,101,000
Ending balance at Aug. 31, 2020	368,166	$ 451	310,891	90,425	(33,601)
Beginning balance (in shares) at May. 31, 2020		45,033,000
Beginning balance at May. 31, 2020	339,961	$ 450	303,832	73,923	(38,244)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of stock under employee stock purchase plan (in shares)		54,000
Issuance of stock under employee stock purchase plan	1,473	$ 1	1,472
Exercise of stock options (in shares)		2,000
Exercise of stock options	79		79
Vesting of restricted stock units and release of deferred stock units (in shares)		12,000
Vesting of restricted stock units and release of deferred stock units	0
Withholding tax payments related to net issuance of RSUs	(177)		(177)
Stock-based compensation	5,685		5,685
Dividends declared	$ (7,475)			(7,475)
Treasury stock repurchases and retirements (in shares)	0
Net income	$ 23,977			23,977
Other comprehensive income (loss)	4,643				4,643
Ending balance (in shares) at Aug. 31, 2020		45,101,000
Ending balance at Aug. 31, 2020	$ 368,166	$ 451	310,891	90,425	(33,601)
Beginning balance (in shares) at Nov. 30, 2020	44,240,635	44,241,000
Beginning balance at Nov. 30, 2020	$ 346,013	$ 442	305,802	72,547	(32,778)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of stock under employee stock purchase plan (in shares)		212,000
Issuance of stock under employee stock purchase plan	5,926	$ 2	5,924
Exercise of stock options (in shares)		87,000
Exercise of stock options	2,841	$ 1	2,840
Vesting of restricted stock units and release of deferred stock units (in shares)		100,000
Vesting of restricted stock units and release of deferred stock units	0	$ 1	(1)
Withholding tax payments related to net issuance of RSUs	(2,398)		(2,398)
Stock-based compensation	21,985		21,985
Equity components of Notes, net of issuance costs and tax	47,456		47,456
Purchase of capped calls, net of tax	(32,507)		(32,507)
Dividends declared	$ (23,456)			(23,456)
Treasury stock repurchases and retirements (in shares)	(800,000)	(797,000)
Treasury stock repurchases and retirements	$ (35,000)	$ (8)	(5,862)	(29,130)
Net income	63,494			63,494
Other comprehensive income (loss)	$ 2,419				2,419
Ending balance (in shares) at Aug. 31, 2021	43,842,539	43,843,000
Ending balance at Aug. 31, 2021	$ 396,773	$ 438	343,239	83,455	(30,359)
Beginning balance (in shares) at May. 31, 2021		43,745,000
Beginning balance at May. 31, 2021	365,721	$ 437	333,627	60,301	(28,644)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of stock under employee stock purchase plan (in shares)		67,000
Issuance of stock under employee stock purchase plan	1,886	$ 1	1,885
Exercise of stock options (in shares)		31,000
Exercise of stock options	1,009		1,009
Withholding tax payments related to net issuance of RSUs	(25)		(25)
Stock-based compensation	6,839		6,839
Equity components of Notes, net of issuance costs and tax	(341)		(341)
Purchase of capped calls, net of tax	245		245
Dividends declared	$ (7,822)			(7,822)
Treasury stock repurchases and retirements (in shares)	0
Net income	$ 30,976			30,976
Other comprehensive income (loss)	$ (1,715)				(1,715)
Ending balance (in shares) at Aug. 31, 2021	43,842,539	43,843,000
Ending balance at Aug. 31, 2021	$ 396,773	$ 438	$ 343,239	$ 83,455	$ (30,359)