Consolidated Statement of Shareholders' Equity (USD $) In Thousands, unless otherwise specified	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Stock [Member]
Balance, beginning balance at Feb. 29, 2012	$ 287,609	$ 25,218	$ 14,201	$ 247,060	$ 1,304	$ (174)
Balance, beginning balance (shares) at Feb. 29, 2012		25,218
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options	15	7	8
Stock compensation (shares)		14
Stock compensation	3,175	14	3,161
Restricted Stock Units	(413)		(517)			104
Stock Issued for SARs, Shares		90
Stock Issued for SARs	(1,192)	90	(1,297)			15
Employee Stock Purchase Plan (shares)		47
Employee Stock Purchase Plan	(916)	47	(814)			55
Federal income tax deducted on stock options	1,283		1,283
Cash dividend paid	(13,423)			(13,423)
Net income	60,456			60,456
Foreign currency translation	(4,439)				(4,439)
Interest rate swap, net of $29,205 of income tax	(54)				(54)
Balance, ending balance at Feb. 28, 2013	333,933	25,376	17,653	294,093	(3,189)	0
Balance, ending balance (shares) at Feb. 28, 2013		25,376
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock compensation (shares)		14
Stock compensation	3,703	14	3,689
Stock Issued During Period, Shares, Restricted Stock Award, Gross		56
Restricted Stock Units	(1,337)	56	(1,393)
Stock Issued for SARs, Shares		68
Stock Issued for SARs	(1,049)	68	(1,117)
Employee Stock Purchase Plan (shares)		63
Employee Stock Purchase Plan	(1,582)	63	(1,519)
Federal income tax deducted on stock options	1,603		(1,603)
Cash dividend paid	(14,290)			(14,290)
Net income	59,597			59,597
Foreign currency translation	(7,775)				(7,775)
Interest rate swap, net of $29,205 of income tax	(54)				(54)
Balance, ending balance at Feb. 28, 2014	375,913	25,577	21,954	339,400	(11,018)	0
Balance, ending balance (shares) at Feb. 28, 2014		25,577
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock compensation (shares)		16
Stock compensation	4,080	16	4,064
Stock Issued During Period, Shares, Restricted Stock Award, Gross		21
Restricted Stock Units	(476)	21	(497)
Stock Issued for SARs, Shares		40
Stock Issued for SARs	(331)	40	(371)
Employee Stock Purchase Plan (shares)		78
Employee Stock Purchase Plan	2,375	78	2,297
Federal income tax deducted on stock options	259		259
Cash dividend paid	(14,897)			(14,897)
Net income	64,943
Foreign currency translation	(11,760)				(11,760)
Interest rate swap, net of $29,205 of income tax	(54)				(54)
Balance, ending balance at Feb. 28, 2015	$ 420,052	$ 25,732	$ 27,706	$ 389,446	$ (22,832)	$ 0
Balance, ending balance (shares) at Feb. 28, 2015		25,732