Discontinued Operations - Discontinued Operations in Consolidated Statements of Operations (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Aug. 31, 2023	Aug. 31, 2022	Aug. 31, 2023	Aug. 31, 2022
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net income (loss) from discontinued operations	$ 0	$ (82,690)	$ 0	$ (73,978)
Earnings per common share from discontinued operations:
Earnings (loss) per common share from discontinued operations (in dollars per share)	$ 0	$ (3.33)	$ 0	$ (2.99)
Earnings (loss) per common share from discontinued operations (in dollars per share)	$ 0	$ (2.85)	$ 0	$ (2.70)
Discontinued Operations, Disposed of by Sale | AZZ Infrastructure Solutions
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Sales		$ 106,660		$ 213,924
Cost of sales		84,826		167,686
Gross margin		21,834		46,238
Selling, general and administrative		9,710		22,114
Loss on disposal		114,900		114,900
Operating income (loss) from discontinued operations		(102,776)		(90,776)
Interest expense		5		6
Other (income) expense, net		3,443		4,268
Income (loss) from discontinued operations before income tax		(106,224)		(95,050)
Income tax (benefit) expense		(23,534)		(21,072)
Net income (loss) from discontinued operations		$ (82,690)		$ (73,978)
Earnings per common share from discontinued operations:
Earnings (loss) per common share from discontinued operations (in dollars per share)		$ (3.33)		$ (2.99)
Earnings (loss) per common share from discontinued operations (in dollars per share)		$ (2.85)		$ (2.70)