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. 29, 2016		25,874
Balance, beginning balance at Feb. 29, 2016	$ 484,370	$ 25,874	$ 35,148	$ 453,908	$ (30,560)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock compensation (shares)		13
Share-based compensation	5,870	$ 13	5,857
Stock Issued During Period, Shares, Restricted Stock Award, Gross		25
Restricted Stock Units	(580)	$ 25	(605)
Stock Issued for SARs, Shares		81
Stock Issued for SARs	(241)	$ 81	(322)
Employee Stock Purchase Plan (shares)		71
Employee Stock Purchase Plan	2,914	$ 71	2,843
Stock Repurchased and Retired During Period, Shares		(100)
Stock Repurchased and Retired During Period, Value		$ (100)	(5,182)
Retirement of treasury shares	5,282
Cash dividend paid	(16,645)			(16,645)
Net income	61,264			61,264	0
Foreign currency translation	1,520				1,520
Interest rate swap, net of $29,205 of income tax	(54)				(54)
Balance, ending balance (shares) at Feb. 28, 2017		25,964
Balance, ending balance at Feb. 28, 2017	533,136	$ 25,964	37,739	498,527	(29,094)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock compensation (shares)		16
Share-based compensation	6,121	$ 16	6,105
Stock Issued During Period, Shares, Restricted Stock Award, Gross		43
Restricted Stock Units	(1,213)	$ 43	(1,256)
Stock Issued for SARs, Shares		6
Stock Issued for SARs	(5)	$ 6	(11)
Employee Stock Purchase Plan (shares)		77
Employee Stock Purchase Plan	3,317	$ 77	3,240
Stock Repurchased and Retired During Period, Shares		(147)
Stock Repurchased and Retired During Period, Value		$ (147)	(7,371)
Retirement of treasury shares	(7,518)			0
Cash dividend paid	(17,678)			(17,678)
Net income	45,169			45,169	0
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	38,446	526,018	(25,220)
Cumulative Effect on Retained Earnings, Net of Tax				(716)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock compensation (shares)		15
Share-based compensation	4,659	$ 15	4,644
Stock Issued During Period, Shares, Restricted Stock Award, Gross		31
Restricted Stock Units	(552)	$ 31	(583)
Stock Issued for SARs, Shares		9
Stock Issued for SARs	(21)	$ 9	(30)
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
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	$ 46,141	$ 560,224	$ (28,752)