Condensed Consolidated Statement of Shareholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Capital in Excess of Par Value	Retained Earnings	Accumulated Other Comprehensive Loss
Balance (shares) at Feb. 29, 2020		26,148
Balance at Feb. 29, 2020	$ 634,366	$ 26,148	$ 66,703	$ 572,414	$ (30,899)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation	5,773		5,773
Common stock issued under stock-based plans and related income tax expense (shares)		76
Common stock issued under stock-based plans and related income tax expense	(646)	$ 76	(722)
Common stock issued under employee stock purchase plan (shares)		58
Common stock issued under employee stock purchase plan	1,694	$ 58	1,636
Repurchase and retirement of treasury shares (shares)		(852)
Repurchase and retirement of treasury shares	(30,953)	$ (852)		(30,101)
Cash dividends paid	(13,324)			(13,324)
Net income	23,454			23,454
Foreign currency translation	3,756				3,756
Interest rate swap	(42)				(42)
Balance (shares) at Nov. 30, 2020		25,430
Balance at Nov. 30, 2020	624,078	$ 25,430	73,390	552,443	(27,185)
Balance (shares) at Aug. 31, 2020		26,076
Balance at Aug. 31, 2020	631,541	$ 26,076	71,797	561,094	(27,426)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation	1,690		1,690
Common stock issued under stock-based plans and related income tax expense (shares)		6
Common stock issued under stock-based plans and related income tax expense	(91)	$ 6	(97)
Repurchase and retirement of treasury shares (shares)		(652)
Repurchase and retirement of treasury shares	(24,574)	$ (652)		(23,922)
Cash dividends paid	(4,432)			(4,432)
Net income	19,703			19,703
Foreign currency translation	255				255
Interest rate swap	(14)				(14)
Balance (shares) at Nov. 30, 2020		25,430
Balance at Nov. 30, 2020	624,078	$ 25,430	73,390	552,443	(27,185)
Balance (shares) at Feb. 28, 2021		25,108
Balance at Feb. 28, 2021	623,292	$ 25,108	75,979	547,289	(25,084)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation	6,542		6,542
Common stock issued under stock-based plans and related income tax expense (shares)		108
Common stock issued under stock-based plans and related income tax expense	(2,169)	$ 108	(2,277)
Common stock issued under employee stock purchase plan (shares)		41
Common stock issued under employee stock purchase plan	1,544	$ 41	1,503
Repurchase and retirement of treasury shares (shares)		(564)
Repurchase and retirement of treasury shares	(28,869)	$ (564)		(28,305)
Cash dividends paid	(12,673)			(12,673)
Net income	62,400			62,400
Foreign currency translation	(2,023)			(70)	(1,953)
Interest rate swap	0
Balance (shares) at Nov. 30, 2021		24,693
Balance at Nov. 30, 2021	648,044	$ 24,693	81,747	568,641	(27,037)
Balance (shares) at Aug. 31, 2021		24,840
Balance at Aug. 31, 2021	638,426	$ 24,840	79,908	559,207	(25,529)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation	1,860		1,860
Common stock issued under stock-based plans and related income tax expense (shares)		1
Common stock issued under stock-based plans and related income tax expense	(20)	$ 1	(21)
Repurchase and retirement of treasury shares (shares)		(148)
Repurchase and retirement of treasury shares	(7,636)	$ (148)		(7,488)
Cash dividends paid	(4,163)			(4,163)
Net income	21,085			21,085
Foreign currency translation	(1,508)				(1,508)
Interest rate swap	0
Balance (shares) at Nov. 30, 2021		24,693
Balance at Nov. 30, 2021	$ 648,044	$ 24,693	$ 81,747	$ 568,641	$ (27,037)