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. 29, 2020	$ 294,329	$ 75,134	$ 123,052	$ 193,809	$ 25,206	$ 72,460
Beginning balance common stock, shares at Feb. 29, 2020		30,053,443
Beginning balance, treasury stock, shares at Feb. 29, 2020						(4,136,286)
Net earnings	10,606			10,606
Adjustment to pension, net of deferred tax of $95, $199, $145 and $289 respectively	866				866
Dividends paid ($0.25, $0.475, $0.225 and $0.45 per share respectively)	(11,730)			(11,730)
Stock based compensation	664		664
Exercise of stock options and restricted stock			(1,286)			$ 1,286
Exercise of stock options and restricted stock, shares						73,413
Common stock repurchases	(423)					$ (423)
Common stock repurchases, shares						(26,472)
Ending balance at Aug. 31, 2020	294,312	$ 75,134	122,430	192,685	(24,340)	$ (71,597)
Ending balance common stock, shares at Aug. 31, 2020		30,053,443
Ending balance treasury stock, shares at Aug. 31, 2020						(4,089,345)
Beginning balance at May. 31, 2020	292,998	$ 75,134	122,266	192,130	(24,773)	$ (71,759)
Beginning balance common stock, shares at May. 31, 2020		30,053,443
Beginning balance, treasury stock, shares at May. 31, 2020						(4,098,607)
Net earnings	6,421			6,421
Adjustment to pension, net of deferred tax of $95, $199, $145 and $289 respectively	433				433
Dividends paid ($0.25, $0.475, $0.225 and $0.45 per share respectively)	(5,866)			(5,866)
Stock based compensation	326		326
Exercise of stock options and restricted stock			(162)			$ 162
Exercise of stock options and restricted stock, shares						9,262
Ending balance at Aug. 31, 2020	294,312	$ 75,134	122,430	192,685	(24,340)	$ (71,597)
Ending balance common stock, shares at Aug. 31, 2020		30,053,443
Ending balance treasury stock, shares at Aug. 31, 2020						(4,089,345)
Beginning balance at Feb. 28, 2021	$ 300,549	$ 75,134	123,017	194,436	(20,282)	$ (71,756)
Beginning balance common stock, shares at Feb. 28, 2021	30,053,443	30,053,443
Beginning balance, treasury stock, shares at Feb. 28, 2021						(4,103,630)
Net earnings	$ 14,764			14,764
Adjustment to pension, net of deferred tax of $95, $199, $145 and $289 respectively	597				597
Dividends paid ($0.25, $0.475, $0.225 and $0.45 per share respectively)	(12,391)			(12,391)
Stock based compensation	$ 1,802		1,802
Exercise of stock options and restricted stock			(1,703)			$ 1,703
Exercise of stock options and restricted stock, shares						97,362
Common stock repurchases, shares	0
Ending balance at Aug. 31, 2021	$ 305,321	$ 75,134	123,116	196,809	(19,685)	$ (70,053)
Ending balance common stock, shares at Aug. 31, 2021	30,053,443	30,053,443
Ending balance treasury stock, shares at Aug. 31, 2021						(4,006,268)
Beginning balance at May. 31, 2021	$ 303,452	$ 75,134	122,746	195,874	(19,983)	$ (70,319)
Beginning balance common stock, shares at May. 31, 2021		30,053,443
Beginning balance, treasury stock, shares at May. 31, 2021						(4,021,466)
Net earnings	7,460			7,460
Adjustment to pension, net of deferred tax of $95, $199, $145 and $289 respectively	298				298
Dividends paid ($0.25, $0.475, $0.225 and $0.45 per share respectively)	(6,525)			(6,525)
Stock based compensation	636		636
Exercise of stock options and restricted stock			(266)			$ 266
Exercise of stock options and restricted stock, shares						15,198
Ending balance at Aug. 31, 2021	$ 305,321	$ 75,134	$ 123,116	$ 196,809	$ (19,685)	$ (70,053)
Ending balance common stock, shares at Aug. 31, 2021	30,053,443	30,053,443
Ending balance treasury stock, shares at Aug. 31, 2021						(4,006,268)