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, 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
Beginning balance, treasury stock, shares at Feb. 28, 2019						(4,097,099)
Net earnings	29,718			29,718
Adjustment to pension, net of deferred tax	677				677
Dividends paid	(17,622)			(17,622)
Stock based compensation	1,018		1,018
Exercise of stock options and restricted stock			(1,382)			$ 1,382
Exercise of stock options and restricted stock, shares						87,143
Common stock repurchases	(2,471)					$ (2,471)
Common stock repurchases, shares						(126,330)
Ending balance at Nov. 30, 2019	300,447	$ 75,134	122,701	191,099	(16,027)	$ (72,460)
Ending balance common stock, shares at Nov. 30, 2019		30,053,443
Ending balance treasury stock, shares at Nov. 30, 2019						(4,136,286)
Beginning balance at Aug. 31, 2019	296,017	$ 75,134	122,359	186,417	(16,248)	$ (71,645)
Beginning balance common stock, shares at Aug. 31, 2019		30,053,443
Beginning balance, treasury stock, shares at Aug. 31, 2019						(4,094,674)
Net earnings	10,553			10,553
Adjustment to pension, net of deferred tax	221				221
Dividends paid	(5,871)			(5,871)
Stock based compensation	353		353
Exercise of stock options and restricted stock			(11)			$ 11
Exercise of stock options and restricted stock, shares						667
Common stock repurchases	(826)					$ (826)
Common stock repurchases, shares						(42,279)
Ending balance at Nov. 30, 2019	300,447	$ 75,134	122,701	191,099	(16,027)	$ (72,460)
Ending balance common stock, shares at Nov. 30, 2019		30,053,443
Ending balance treasury stock, shares at Nov. 30, 2019						(4,136,286)
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	30,053,443
Beginning balance, treasury stock, shares at Feb. 29, 2020						(4,136,286)
Net earnings	$ 18,969			18,969
Adjustment to pension, net of deferred tax	1,299				1,299
Dividends paid	(17,601)			(17,601)
Stock based compensation	933		933
Exercise of stock options and restricted stock			(1,286)			$ 1,286
Exercise of stock options and restricted stock, shares						73,413
Common stock repurchases	$ (1,235)					$ (1,235)
Common stock repurchases, shares	(77,996)					(77,996)
Ending balance at Nov. 30, 2020	$ 296,694	$ 75,134	122,699	195,177	(23,907)	$ (72,409)
Ending balance common stock, shares at Nov. 30, 2020	30,053,443	30,053,443
Ending balance treasury stock, shares at Nov. 30, 2020						(4,140,869)
Beginning balance at Aug. 31, 2020	$ 294,312	$ 75,134	122,430	192,685	(24,340)	$ (71,597)
Beginning balance common stock, shares at Aug. 31, 2020		30,053,443
Beginning balance, treasury stock, shares at Aug. 31, 2020						(4,089,345)
Net earnings	8,363			8,363
Adjustment to pension, net of deferred tax	433				433
Dividends paid	(5,871)			(5,871)
Stock based compensation	269		269
Common stock repurchases	(812)					$ (812)
Common stock repurchases, shares						(51,524)
Ending balance at Nov. 30, 2020	$ 296,694	$ 75,134	$ 122,699	$ 195,177	$ (23,907)	$ (72,409)
Ending balance common stock, shares at Nov. 30, 2020	30,053,443	30,053,443
Ending balance treasury stock, shares at Nov. 30, 2020						(4,140,869)