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 Income (Loss)
Balance (shares) at Feb. 29, 2020		26,148
Balance at Feb. 29, 2020	$ 634,367	$ 26,148	$ 66,703	$ 572,414	$ (30,898)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation	4,083		4,083
Common stock issued under stock-based plans and related income tax expense (shares)		70
Common stock issued under stock-based plans and related income tax expense	(555)	$ 70	(625)
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)		(200)
Repurchase and retirement of treasury shares	(6,379)	$ (200)		(6,179)
Cash dividends paid	(8,892)			(8,892)
Net income (loss)	3,751			3,751
Foreign currency translation	3,500				3,500
Interest rate swap	(28)				(28)
Balance (shares) at Aug. 31, 2020		26,076
Balance at Aug. 31, 2020	631,541	$ 26,076	71,797	561,094	(27,426)
Balance (shares) at May. 31, 2020		26,195
Balance at May. 31, 2020	635,656	$ 26,195	67,883	573,530	(31,952)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation	2,317		2,317
Common stock issued under stock-based plans and related income tax expense (shares)		23
Common stock issued under stock-based plans and related income tax expense	(16)	$ 23	(39)
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)		(200)
Repurchase and retirement of treasury shares	(6,379)	$ (200)		(6,179)
Cash dividends paid	(4,467)			(4,467)
Net income (loss)	(1,790)			(1,790)
Foreign currency translation	4,540				4,540
Interest rate swap	(14)				(14)
Balance (shares) at Aug. 31, 2020		26,076
Balance at Aug. 31, 2020	631,541	$ 26,076	71,797	561,094	(27,426)
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	4,682		4,682
Common stock issued under stock-based plans and related income tax expense (shares)		107
Common stock issued under stock-based plans and related income tax expense	(2,149)	$ 107	(2,256)
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)		(416)
Repurchase and retirement of treasury shares	(21,233)	$ (416)		(20,817)
Cash dividends paid	(8,510)			(8,510)
Net income (loss)	41,315			41,315
Foreign currency translation	(515)			(70)	(445)
Balance (shares) at Aug. 31, 2021		24,840
Balance at Aug. 31, 2021	638,426	$ 24,840	79,908	559,207	(25,529)
Balance (shares) at May. 31, 2021		25,071
Balance at May. 31, 2021	637,411	$ 25,071	75,600	559,173	(22,433)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation	2,871		2,871
Common stock issued under stock-based plans and related income tax expense (shares)		18
Common stock issued under stock-based plans and related income tax expense	(48)	$ 18	(66)
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)		(290)
Repurchase and retirement of treasury shares	(14,969)	$ (290)		(14,679)
Cash dividends paid	(4,265)			(4,265)
Net income (loss)	18,978			18,978
Foreign currency translation	(3,096)				(3,096)
Interest rate swap	0
Balance (shares) at Aug. 31, 2021		24,840
Balance at Aug. 31, 2021	$ 638,426	$ 24,840	$ 79,908	$ 559,207	$ (25,529)