Consolidated Statement of Shareholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Impact of ASC 606 adoption | Accounting Standards Update 2014-09	$ 716			$ 716
Balance, beginning balance (shares) at Feb. 28, 2018		25,959
Balance, beginning balance at Feb. 28, 2018	565,203	$ 25,959	$ 51,000	513,464	$ (25,220)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation	4,659		4,659
Common stock issued under stock-based plans and related income tax expense (shares)		55
Common stock issued under stock-based plans and related income tax expense	(573)	$ 55	(628)
Common stock issued under employee stock purchase plan (shares)		101
Common stock issued under employee stock purchase plan	3,765	$ 101	3,664
Cash dividends paid	(17,718)			(17,718)
Net income	51,208			51,208
Foreign currency translation	(3,478)				(3,478)
Interest rate swap, net of tax	(54)				(54)
Balance, ending balance (shares) at Feb. 28, 2019		26,115
Balance, ending balance at Feb. 28, 2019	603,728	$ 26,115	58,695	547,670	(28,752)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation	6,290		6,290
Common stock issued under stock-based plans and related income tax expense (shares)		74
Common stock issued under stock-based plans and related income tax expense	(1,231)	$ 74	(1,305)
Common stock issued under employee stock purchase plan (shares)		90
Common stock issued under employee stock purchase plan	3,113	$ 90	3,023
Repurchase and retirement of common stock (shares)		131
Repurchase and retirement of common stock	5,799	$ 131		5,668
Cash dividends paid	(17,822)			(17,822)
Net income	48,234			48,234
Foreign currency translation	(2,093)				(2,093)
Interest rate swap, net of tax	(54)				(54)
Balance, ending balance (shares) at Feb. 29, 2020		26,148
Balance, ending balance at Feb. 29, 2020	634,366	$ 26,148	66,703	572,414	(30,899)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation	7,330		7,330
Common stock issued under stock-based plans and related income tax expense (shares)		83
Common stock issued under stock-based plans and related income tax expense	(712)	$ 83	(795)
Common stock issued under employee stock purchase plan (shares)		91
Common stock issued under employee stock purchase plan	2,832	$ 91	2,741
Repurchase and retirement of common stock (shares)		1,214
Repurchase and retirement of common stock	48,311	$ 1,214		47,097
Cash dividends paid	(17,642)			(17,642)
Net income	39,614			39,614
Foreign currency translation	5,865				5,865
Interest rate swap, net of tax	(50)				(50)
Balance, ending balance (shares) at Feb. 28, 2021		25,108
Balance, ending balance at Feb. 28, 2021	$ 623,292	$ 25,108	$ 75,979	$ 547,289	$ (25,084)