Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Common Stock	Additional Paid-In Capital	Retained Earnings	Retained Earnings Cumulative Effect, Period of Adoption, Adjustment	Accumulated Other Comprehensive Loss
Balance, beginning of year (in shares) at Nov. 30, 2018			45,115,000
Balance, beginning of year at Nov. 30, 2018	$ 324,002	$ 4,781	$ 451	$ 266,602	$ 85,125	$ 4,781	$ (28,176)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of stock under employee stock purchase plan (in shares)			189,000
Issuance of stock under employee stock purchase plan	5,507		$ 2	5,505
Exercise of stock options (in shares)			119,000
Exercise of stock options	3,621		$ 1	3,620
Vesting of restricted stock units and release of deferred stock units (in shares)			364,000
Vesting of restricted stock units and release of deferred stock units	3		$ 4	(1)
Withholding tax payments related to net issuance of restricted stock units (in shares)			(106,000)
Withholding tax payments related to net issuance of restricted stock units	(4,278)		$ (1)	(4,277)
Stock-based compensation	23,311			23,311
Issuance of shares related to non-compete agreement (in shares)			44,000
Issuance of shares related to non-compete agreement	2,000			2,000
Dividends declared	$ (28,267)				(28,267)
Treasury stock repurchases and retirements (in shares)	(700,000)		(688,000)
Treasury stock repurchases and retirements	$ (25,000)		$ (7)	(1,257)	(23,736)
Net income	26,400				26,400
Other comprehensive loss	(1,798)						(1,798)
Balance, end of year (in shares) at Nov. 30, 2019			45,037,000
Balance, end of year 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)			237,000
Issuance of stock under employee stock purchase plan	6,606		$ 2	6,604
Exercise of stock options (in shares)			137,000
Exercise of stock options	4,361		$ 1	4,360
Vesting of restricted stock units and release of deferred stock units (in shares)			416,000
Vesting of restricted stock units and release of deferred stock units	0		$ 4	(4)
Withholding tax payments related to net issuance of restricted stock units (in shares)			(140,000)
Withholding tax payments related to net issuance of restricted stock units	(5,331)		$ (1)	(5,330)
Stock-based compensation	23,482			23,482
Dividends declared	$ (30,305)				(30,305)
Treasury stock repurchases and retirements (in shares)	(1,400,000)		(1,446,000)
Treasury stock repurchases and retirements	$ (60,000)		$ (14)	(18,813)	(41,173)
Net income	79,722				79,722
Other comprehensive loss	$ (2,804)						(2,804)
Balance, end of year (in shares) at Nov. 30, 2020	44,240,635		44,241,000
Balance, end of year 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)			277,000
Issuance of stock under employee stock purchase plan	$ 7,818		$ 3	7,815
Exercise of stock options (in shares)	195,000		195,000
Exercise of stock options	$ 6,997		$ 2	6,995
Vesting of restricted stock units and release of deferred stock units (in shares)			342,000
Vesting of restricted stock units and release of deferred stock units	0		$ 3	(3)
Withholding tax payments related to net issuance of restricted stock units (in shares)			(112,000)
Withholding tax payments related to net issuance of restricted stock units	(5,186)		$ (1)	(5,185)
Stock-based compensation	29,724			29,724
Equity component 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	$ (31,581)				(31,581)
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	78,420				78,420
Other comprehensive loss	$ 335						335
Balance, end of year (in shares) at Nov. 30, 2021	44,146,193		44,146,000
Balance, end of year at Nov. 30, 2021	$ 412,489		$ 441	$ 354,235	$ 90,256		$ (32,443)