Consolidated Statement of Changes in Shareholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Capital in Excess of Par Value	Retained Earnings	Accumulated Other Comprehensive Loss	Preferred Stock Series A Preferred Stock
Balance, beginning balance (shares) at Feb. 28, 2022		24,688
Balance, beginning balance at Feb. 28, 2022	$ 667,365	$ 24,688	$ 85,847	$ 584,154	$ (27,324)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation	1,998		1,998
Common stock issued under stock-based plans and related income tax expense (shares)		100
Common stock issued under stock-based plans and related income tax expense	(2,313)	$ 100	(2,413)
Cash dividends paid on common shares	(4,192)			(4,192)
Net income available to common shareholders	24,077			24,077
Foreign currency translation	624				624
Balance, ending balance (shares) at May. 31, 2022		24,788
Balance, ending balance at May. 31, 2022	687,559	$ 24,788	85,432	604,039	(26,700)
Balance, beginning balance (shares) at Feb. 28, 2023		24,912				240
Balance, beginning balance at Feb. 28, 2023	853,460	$ 24,912	326,839	506,042	(4,573)	$ 240
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation	1,904		1,904
Common stock issued under stock-based plans and related income tax expense (shares)		101
Accrued dividends on preferred stock	(3,600)			(3,600)
Common stock issued under stock-based plans and related income tax expense	(1,711)	$ 101	(1,812)
Cash dividends paid on common shares	(4,235)			(4,235)
Net income available to common shareholders	28,522			28,522
Foreign currency translation	1,131				1,131
Interest rate swap	(4,098)				(4,098)
Balance, ending balance (shares) at May. 31, 2023		25,013				240
Balance, ending balance at May. 31, 2023	$ 871,373	$ 25,013	$ 326,931	$ 526,729	$ (7,540)	$ 240