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	19,165			19,165
Adjustment to pension, net of deferred tax	456				456
Dividends paid	(11,751)			(11,751)
Stock based compensation	665		665
Exercise of stock options and restricted stock			(1,371)			$ 1,371
Exercise of stock options and restricted stock, shares						86,476
Common stock repurchases	(1,645)					$ (1,645)
Common stock repurchases, shares						(84,051)
Ending balance at Aug. 31, 2019	296,017	$ 75,134	122,359	186,417	(16,248)	$ (71,645)
Ending balance common stock, shares at Aug. 31, 2019		30,053,443
Ending balance treasury stock, shares at Aug. 31, 2019						(4,094,674)
Beginning balance at May. 31, 2019	292,264	$ 75,134	122,111	182,760	(16,470)	$ (71,271)
Beginning balance common stock, shares at May. 31, 2019		30,053,443
Beginning balance, treasury stock, shares at May. 31, 2019						(4,076,042)
Net earnings	9,533			9,533
Adjustment to pension, net of deferred tax	222				222
Dividends paid	(5,876)			(5,876)
Stock based compensation	307		307
Exercise of stock options and restricted stock			(59)			$ 59
Exercise of stock options and restricted stock, shares						3,381
Common stock repurchases	(433)					$ (433)
Common stock repurchases, shares						(22,013)
Ending balance at Aug. 31, 2019	296,017	$ 75,134	122,359	186,417	(16,248)	$ (71,645)
Ending balance common stock, shares at Aug. 31, 2019		30,053,443
Ending balance treasury stock, shares at Aug. 31, 2019						(4,094,674)
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	$ 10,606			10,606
Adjustment to pension, net of deferred tax	866				866
Dividends paid	(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)					(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	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	433				433
Dividends paid	(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	30,053,443
Ending balance treasury stock, shares at Aug. 31, 2020						(4,089,345)