Discontinued Operations - Discontinued Operations in Consolidated Statements of Operations (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended			9 Months Ended
	Nov. 30, 2023	Nov. 30, 2022	Aug. 31, 2022	Nov. 30, 2023	Nov. 30, 2022
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss on disposal		$ 45,010			$ 159,910
Net income (loss) from discontinued operations	$ 0	$ (38,981)		$ 0	$ (112,947)
Loss per common share from discontinued operations:
Earnings (loss) per common share from discontinued operations (in dollars per share)	$ 0	$ (1.57)		$ 0	$ (4.55)
Earnings (loss) per common share from discontinued operations (in dollars per share)	$ 0	$ (1.56)		$ 0	$ (4.52)
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		$ 42,300			$ 256,224
Cost of sales		35,020			202,707
Gross margin		7,280			53,517
Selling, general and administrative		4,074			26,186
Loss on disposal		45,010	$ 114,900		159,910
Operating income (loss) from discontinued operations		(41,804)			(132,579)
Interest expense		2			8
Other (income) expense, net		2,002			6,270
Income (loss) from discontinued operations before income tax		(43,808)			(138,857)
Income tax (benefit) expense		(4,827)			(25,910)
Net income (loss) from discontinued operations		$ (38,981)			$ (112,947)
Loss per common share from discontinued operations:
Earnings (loss) per common share from discontinued operations (in dollars per share)		$ (1.57)			$ (4.55)
Earnings (loss) per common share from discontinued operations (in dollars per share)		$ (1.56)			$ (4.52)