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]
Balance, beginning balance (shares) at Feb. 28, 2017		25,964
Balance, beginning balance at Feb. 28, 2017	$ 533,136	$ 25,964	$ 42,922	$ 493,344	$ (29,094)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock compensation (shares)		0
Share-based compensation	6,121	$ 0	6,121
Stock Issued During Period, Shares, Restricted Stock Award, Gross		65
Restricted Stock Units	(1,218)	$ 65	(1,283)
Employee Stock Purchase Plan (shares)		77
Employee Stock Purchase Plan	3,317	$ 77	3,240
Retirement of treasury shares (in shares)		(147)
Retirement of treasury shares	(7,518)	$ (147)		(7,371)	0
Cash dividend paid	(17,678)			(17,678)
Net income	45,169			45,169
Foreign currency translation	3,928				3,928
Interest rate swap, net of $29,205 of income tax	(54)				(54)
Balance, ending balance (shares) at Feb. 28, 2018		25,959
Balance, ending balance at Feb. 28, 2018	565,203	$ 25,959	51,000	513,464	(25,220)
Cumulative Effect on Retained Earnings, Net of Tax	716			716
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock compensation (shares)		0
Share-based compensation	4,659	$ 0	4,659
Stock Issued During Period, Shares, Restricted Stock Award, Gross		55
Restricted Stock Units	(573)	$ 55	(628)
Employee Stock Purchase Plan (shares)		101
Employee Stock Purchase Plan	3,765	$ 101	3,664
Cash dividend paid	(17,718)			(17,718)
Net income	51,208			51,208	0
Foreign currency translation	(3,478)				(3,478)
Interest rate swap, net of $29,205 of income 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]
Stock compensation (shares)		0
Share-based compensation	6,290	$ 0	6,290
Stock Issued During Period, Shares, Restricted Stock Award, Gross		74
Restricted Stock Units	(1,231)	$ 74	(1,305)
Employee Stock Purchase Plan (shares)		90
Employee Stock Purchase Plan	3,113	$ 90	3,023
Retirement of treasury shares (in shares)		131
Retirement of treasury shares	5,799	$ 131		5,668
Cash dividend paid	(17,822)			(17,822)
Net income	48,234			48,234
Foreign currency translation	(2,093)				(2,093)
Interest rate swap, net of $29,205 of income 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)