Discontinued Operations - Discontinued Operations in Consolidated Statements of Operations (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Feb. 29, 2024	Feb. 28, 2023	Feb. 28, 2022
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net income (loss) from discontinued operations	$ 0	$ (119,313)	$ 34,205
Loss per common share from discontinued operations:
Earnings (loss) per common share from discontinued operations (in dollars per share)	$ 0	$ (4.81)	$ 1.38
Earnings (loss) per common share from discontinued operations (in dollars per share)	$ 0	$ (4.78)	$ 1.36
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		$ 256,224	$ 377,066
Cost of sales		202,707	297,996
Gross margin		53,517	79,070
Selling, general and administrative		26,186	46,747
Restructuring and impairment charges		0	(1,797)
Loss on disposal		159,910	0
Operating income (loss) from discontinued operations		(132,579)	34,120
Interest expense		8	32
Other (income) expense, net		6,270	774
Income (loss) from discontinued operations before income tax		(138,857)	33,314
Income tax (benefit) expense		(19,544)	(891)
Net income (loss) from discontinued operations		$ (119,313)	$ 34,205
Loss per common share from discontinued operations:
Earnings (loss) per common share from discontinued operations (in dollars per share)		$ (4.81)	$ 1.38
Earnings (loss) per common share from discontinued operations (in dollars per share)		$ (4.78)	$ 1.36