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, 2017	[1]			47,281,000
Beginning balance at Nov. 30, 2017	[1]	$ 411,349		$ 473		$ 249,363	$ 179,919	$ (18,406)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of stock under employee stock purchase plan (in shares)				293,000
Issuance of stock under employee stock purchase plan		3,069		$ 3		3,066
Exercise of stock options (in shares)				53,000
Exercise of stock options		1,525		$ 1		1,524
Withholding tax payments related to net issuance of restricted stock units		(1,931)				(1,931)
Stock-based compensation		10,150				10,150	0
Dividends declared		$ (12,858)					(12,858)
Treasury stock repurchases and retirements (in shares)		(2,100,000)		(2,124,000)
Treasury stock repurchases and retirements		$ (90,000)		$ (21)		(4,569)	(85,410)
Net income		26,637	[2],[3]				26,637
Other comprehensive income (loss)		(5,215)						(5,215)
Ending balance (in shares) at May. 31, 2018	[1]			45,503,000
Ending balance at May. 31, 2018	[1]	342,726		$ 456		258,244	107,647	(23,621)
Beginning balance (in shares) at Feb. 28, 2018	[1]			46,298,000
Beginning balance at Feb. 28, 2018	[1]	383,737		$ 463		254,584	143,292	(14,602)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of stock under employee stock purchase plan (in shares)				245,000
Issuance of stock under employee stock purchase plan		1,974		$ 3		1,971
Exercise of stock options (in shares)				30,000
Exercise of stock options		856		$ 1		855
Withholding tax payments related to net issuance of restricted stock units		(1,931)				(1,931)
Stock-based compensation		5,580				5,580
Dividends declared		$ (6,375)					(6,375)
Treasury stock repurchases and retirements (in shares)		(1,100,000)		(1,070,000)
Treasury stock repurchases and retirements		$ (45,000)		$ (11)		(2,815)	(42,174)
Net income		12,904	[2]				12,904
Other comprehensive income (loss)		(9,019)						(9,019)
Ending balance (in shares) at May. 31, 2018	[1]			45,503,000
Ending balance at May. 31, 2018	[1]	$ 342,726		$ 456		258,244	107,647	(23,621)
Beginning balance (in shares) at Nov. 30, 2018		45,114,935		45,115,000	[1]
Beginning balance at Nov. 30, 2018	[1]	$ 324,002	[4]	$ 451		266,602	85,125	(28,176)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of stock under employee stock purchase plan (in shares)				99,000
Issuance of stock under employee stock purchase plan		2,803		$ 1		2,802
Exercise of stock options (in shares)				44,000
Exercise of stock options		1,317				1,317
Vesting of restricted stock units and release of deferred stock units (in shares)				146,000
Vesting of restricted stock units and release of deferred stock units		0		$ 1		(1)
Withholding tax payments related to net issuance of restricted stock units (in shares)				(37,000)
Withholding tax payments related to net issuance of restricted stock units		(1,637)				(1,637)
Stock-based compensation		11,922				11,922
Issuance of shares related to non-compete agreement				44,000
Issuance of shares related to non-compete agreement		2,000				2,000
Dividends declared		$ (13,832)					(13,832)
Treasury stock repurchases and retirements (in shares)		(700,000)		(688,000)
Treasury stock repurchases and retirements		$ (25,000)		$ (5)		(1,260)	(23,735)
Net income		17,583					17,583
Other comprehensive income (loss)		$ (414)						(414)
Ending balance (in shares) at May. 31, 2019		44,723,199		44,723,000
Ending balance at May. 31, 2019		$ 315,347		$ 448		281,745	61,744	(28,590)
Beginning balance (in shares) at Feb. 28, 2019				44,474,000
Beginning balance at Feb. 28, 2019		306,702		$ 446		272,408	60,462	(26,614)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of stock under employee stock purchase plan (in shares)				61,000
Issuance of stock under employee stock purchase plan		1,806		$ 1		1,805
Exercise of stock options (in shares)				35,000
Exercise of stock options		1,049				1,049
Vesting of restricted stock units and release of deferred stock units (in shares)				146,000
Vesting of restricted stock units and release of deferred stock units		0		$ 1		(1)
Withholding tax payments related to net issuance of restricted stock units (in shares)				(37,000)
Withholding tax payments related to net issuance of restricted stock units		(1,632)				(1,632)
Stock-based compensation		6,116				6,116
Issuance of shares related to non-compete agreement				44,000
Issuance of shares related to non-compete agreement		2,000				2,000
Dividends declared		(6,899)					(6,899)
Net income		8,181					8,181
Other comprehensive income (loss)		$ (1,976)						(1,976)
Ending balance (in shares) at May. 31, 2019		44,723,199		44,723,000
Ending balance at May. 31, 2019		$ 315,347		$ 448		$ 281,745	$ 61,744	$ (28,590)

[1] The Company adopted ASC 606 effective December 1, 2018 using the full retrospective method. See Note 1. Nature of Business and Basis of Presentation for further information.

[2] The Company adopted ASC 606 effective December 1, 2018 using the full retrospective method. See Note 1. Nature of Business and Basis of Presentation for further information.

[3] The Company adopted ASC 606 effective December 1, 2018 using the full retrospective method. See Note 1. Nature of Business and Basis of Presentation for further information.

[4] 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 Basis of Presentation for further information.