Consolidated Statement of Shareholders Equity (unaudited) - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Common Stock Held In Trust [Member]	Deferred Compensation Obligation [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Beginning balance (in shares) at Feb. 28, 2015	29,050
Beginning balance at Feb. 28, 2015		$ 9,683	$ 138,575	$ 256,538	$ (801)	$ 801	$ (22,320)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	$ 45,406			45,406
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax	$ (45)						(45)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent						0	(9,257)
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures	101
Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures		34	124		(27)	27
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition			3,686
Adjustment to Additional Paid in Capital, Income Tax Effect from Share-based Compensation, Net			4,037
Outstanding shares awards exercised	200
Stock Issued During Period, Value, Stock Options Exercised		67	1,539
Stock Redeemed or Called During Period, Shares	150
Stock Redeemed or Called During Period, Value		50	784	6,424
Stock Repurchased and Retired During Period, Shares	(93)
Stock Repurchased and Retired During Period, Value		(31)	(477)	(4,559)
Dividends, Common Stock, Cash				(9,632)
Ending balance (in shares) at Nov. 28, 2015	29,108
Ending balance at Nov. 28, 2015		9,703	146,700	281,329	(828)	828	(31,622)
Beginning balance (in shares) at Feb. 27, 2016	28,684
Beginning balance at Feb. 27, 2016	$ 406,195	9,561	145,528	282,477	(837)	837	(31,371)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	62,671			62,671
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax	$ (192)						(192)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent						0	2,742
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures	139
Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures		46	94		(26)	26
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition			4,403
Adjustment to Additional Paid in Capital, Income Tax Effect from Share-based Compensation, Net			(1,229)
Outstanding shares awards exercised	125
Stock Issued During Period, Value, Stock Options Exercised		42	1,211
Stock Redeemed or Called During Period, Shares	(250)
Stock Redeemed or Called During Period, Value		(83)	(1,357)	(9,376)	0	0	0
Stock Repurchased and Retired During Period, Shares	(52)
Stock Repurchased and Retired During Period, Value		(17)	(271)	(2,015)
Dividends, Common Stock, Cash				(10,687)
Ending balance (in shares) at Nov. 26, 2016	28,646
Ending balance at Nov. 26, 2016	$ 452,177	$ 9,549	$ 148,379	$ 323,070	$ (863)	$ 863	$ (28,821)