Unaudited Consolidated Statements of Changes in Shareholders' Equity - USD ($)	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	$ 294,329,000	$ 75,134,000	$ 123,052,000	$ 193,809,000	$ (25,206,000)	$ (72,460,000)
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	18,969,000			18,969,000
Adjustment to pension, net of deferred tax of $295, $494, $145 and $289 respectively	1,299,000				1,299,000
Dividends paid ($0.25, $0.475, $0.225 and $0.45 per share respectively)	(17,601,000)			(17,601,000)
Stock based compensation	933,000		933,000
Exercise of stock options and restricted stock			(1,286,000)			$ 1,286,000
Exercise of stock options and restricted stock, shares						73,413
Common stock repurchases	(1,235,000)					$ 1,235,000
Common stock repurchases, shares						(77,996)
Ending balance at Nov. 30, 2020	296,694,000	$ 75,134,000	122,699,000	195,177,000	(23,907,000)	$ (72,409,000)
Ending balance common stock, shares at Nov. 30, 2020		30,053,443
Ending balance treasury stock, shares at Nov. 30, 2020						(4,140,869)
Beginning balance at Aug. 31, 2020	294,312,000	$ 75,134,000	122,430,000	192,685,000	(24,340,000)	$ (71,597,000)
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	8,363,000			8,363,000
Adjustment to pension, net of deferred tax of $295, $494, $145 and $289 respectively	433,000				433,000
Dividends paid ($0.25, $0.475, $0.225 and $0.45 per share respectively)	(5,871,000)			(5,871,000)
Stock based compensation	269,000		269,000
Exercise of stock options and restricted stock			(0)			$ 0
Exercise of stock options and restricted stock, shares						0
Common stock repurchases	(812,000)
Common stock repurchases, shares						51,524
Ending balance at Nov. 30, 2020	296,694,000	$ 75,134,000	122,699,000	195,177,000	(23,907,000)	$ (72,409,000)
Ending balance common stock, shares at Nov. 30, 2020		30,053,443
Ending balance treasury stock, shares at Nov. 30, 2020						(4,140,869)
Beginning balance at Feb. 28, 2021	$ 300,549,000	$ 75,134,000	123,017,000	194,436,000	(20,282,000)	$ (71,756,000)
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	$ 22,327,000			22,327,000
Adjustment to pension, net of deferred tax of $295, $494, $145 and $289 respectively	1,482,000				1,482,000
Dividends paid ($0.25, $0.475, $0.225 and $0.45 per share respectively)	(18,916,000)			(18,916,000)
Stock based compensation	2,444,000		2,444,000
Exercise of stock options and restricted stock			(1,717,000)			$ 1,717,000
Exercise of stock options and restricted stock, shares						98,188
Common stock repurchases	$ (1,942,000)					$ (1,942,000)
Common stock repurchases, shares	(102,757)					(102,757)
Ending balance at Nov. 30, 2021	$ 305,944,000	$ 75,134,000	123,744,000	197,847,000	(18,800,000)	$ (71,981,000)
Ending balance common stock, shares at Nov. 30, 2021	30,053,443	30,053,443
Ending balance treasury stock, shares at Nov. 30, 2021						(4,108,199)
Beginning balance at Aug. 31, 2021	$ 305,321,000	$ 75,134,000	123,116,000	196,809,000	(19,685,000)	$ (70,053,000)
Beginning balance common stock, shares at Aug. 31, 2021		30,053,443
Beginning balance, treasury stock, shares at Aug. 31, 2021						(4,006,268)
Net earnings	7,563,000			7,563,000
Adjustment to pension, net of deferred tax of $295, $494, $145 and $289 respectively	885,000				885,000
Dividends paid ($0.25, $0.475, $0.225 and $0.45 per share respectively)	(6,525,000)			(6,525,000)
Stock based compensation	642,000		642,000
Exercise of stock options and restricted stock			(14,000)			$ 14,000
Exercise of stock options and restricted stock, shares						826
Common stock repurchases	(1,942,000)					$ (1,942,000)
Common stock repurchases, shares						(102,757)
Ending balance at Nov. 30, 2021	$ 305,944,000	$ 75,134,000	$ 123,744,000	$ 197,847,000	$ (18,800,000)	$ (71,981,000)
Ending balance common stock, shares at Nov. 30, 2021	30,053,443	30,053,443
Ending balance treasury stock, shares at Nov. 30, 2021						(4,108,199)