Unaudited 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, 2018	$ 261,704	$ 75,134	$ 121,333	$ 164,177	$ (16,428)	$ (82,512)
Beginning balance common stock, shares at Feb. 28, 2018		30,053,043
Beginning balance, treasury stock, shares at Feb. 28, 2018						(4,789,228)
Net earnings	9,247			9,247
Adjustment to pension, net of deferred tax of $78	261				261
Dividends paid ($0.225 per share)	(5,083)			(5,083)
Stock based compensation	327		327
Exercise of stock options and restricted stock			(1,390)			$ 1,390
Exercise of stock options and restricted stock, shares						80,692
Common stock repurchases	(680)					$ (680)
Common stock repurchases, shares						(37,943)
Ending balance at May. 31, 2018	265,776	$ 75,134	120,270	168,341	(16,167)	$ (81,802)
Ending balance common stock, shares at May. 31, 2018		30,053,043
Ending balance treasury stock, shares at May. 31, 2018						(4,746,479)
Beginning balance at Feb. 28, 2019	$ 289,127	$ 75,134	123,065	179,003	(16,704)	$ (71,371)
Beginning balance common stock, shares at Feb. 28, 2019	30,053,443	30,053,443
Beginning balance, treasury stock, shares at Feb. 28, 2019						(4,097,099)
Net earnings	$ 9,632			9,632
Adjustment to pension, net of deferred tax of $78	234				234
Dividends paid ($0.225 per share)	(5,875)			(5,875)
Stock based compensation	358		358
Exercise of stock options and restricted stock			(1,312)			$ 1,312
Exercise of stock options and restricted stock, shares						83,095
Common stock repurchases	$ (1,212)					$ (1,212)
Common stock repurchases, shares	(62,038)					(62,038)
Ending balance at May. 31, 2019	$ 292,264	$ 75,134	$ 122,111	$ 182,760	$ (16,470)	$ (71,271)
Ending balance common stock, shares at May. 31, 2019	30,053,443	30,053,443
Ending balance treasury stock, shares at May. 31, 2019						(4,076,042)