Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Stock [Member]
Beginning balance at Feb. 28, 2015	$ 284,680	$ 75,134	$ 121,687	$ 188,413	$ (22,197)	$ (78,357)
Beginning balance common stock, shares at Feb. 28, 2015		30,053,443
Beginning balance, treasury stock, shares at Feb. 28, 2015						(4,514,905)
Net earnings	35,736			35,736
Foreign currency translation, net of deferred tax of $3,254 and $6,087 respectively	(5,313)				(5,313)
Adjustment to pension, net of deferred tax of $138 and $1,276 respectively	225				225
Dividends paid ($0.70, $2.20 and $0.875 per share respectively)	(18,044)			(18,044)
Excess tax benefit of stock option exercises and restricted stock grants	(46)		(46)
Stock based compensation	1,308		1,308
Exercise of stock options and restricted stock			(1,352)			$ 1,352
Exercise of stock options and restricted stock, shares						77,900
Ending balance at Feb. 29, 2016	298,546	$ 75,134	121,597	206,105	(27,285)	$ (77,005)
Ending balance common stock, shares at Feb. 29, 2016		30,053,443
Ending balance treasury stock, shares at Feb. 29, 2016						(4,437,005)
Net earnings	1,780			1,780
Foreign currency translation, net of deferred tax of $3,254 and $6,087 respectively	9,940				9,940
Adjustment to pension, net of deferred tax of $138 and $1,276 respectively	2,084				2,084
Dividends paid ($0.70, $2.20 and $0.875 per share respectively)	(57,200)			(57,200)
Excess tax benefit of stock option exercises and restricted stock grants	265		265
Stock based compensation	1,361		1,361
Stock based compensation allocated to loss on sale of discontinued operations	112		112
Exercise of stock options and restricted stock	2,910		(1,810)			$ 4,720
Exercise of stock options and restricted stock, shares						282,988
Common stock repurchases	(8,443)					$ (8,443)
Common stock repurchases, shares						(532,804)
Ending balance at Feb. 28, 2017	$ 251,355	$ 75,134	121,525	150,685	(15,261)	$ (80,728)
Ending balance common stock, shares at Feb. 28, 2017	30,053,443	30,053,443
Ending balance treasury stock, shares at Feb. 28, 2017						(4,686,821)
Net earnings	$ 32,905			32,905
Adjustment to pension, net of deferred tax of $138 and $1,276 respectively	1,680
Adjustment to pension (net of deferred tax of $715) and reclassification of the income tax effects of the US Tax Cuts and Jobs Act	1,680			2,847	(1,167)
Dividends paid ($0.70, $2.20 and $0.875 per share respectively)	(22,260)			(22,260)
Stock based compensation	1,337		1,337
Exercise of stock options and restricted stock			(1,529)			$ 1,529
Exercise of stock options and restricted stock, shares						88,771
Common stock repurchases	$ (3,313)					$ (3,313)
Common stock repurchases, shares	(191,033)					(191,178)
Ending balance at Feb. 28, 2018	$ 261,704	$ 75,134	$ 121,333	$ 164,177	$ (16,428)	$ (82,512)
Ending balance common stock, shares at Feb. 28, 2018	30,053,443	30,053,443
Ending balance treasury stock, shares at Feb. 28, 2018						(4,789,228)