Discontinued Operations - Discontinued Operations in Consolidated Statements of Operations (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Aug. 31, 2022	Aug. 31, 2021	Aug. 31, 2022	Aug. 31, 2021
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss on disposal	$ 114,900	$ 0	$ 114,900	$ 0
Net income (loss) from discontinued operations	$ (82,690)	$ 4,710	$ (73,978)	$ 15,434
Earnings per common share from discontinued operations:
Basic earnings (loss) per share (in dollars per share)	$ (3.33)	$ 0.19	$ (2.99)	$ 0.62
Diluted earnings (loss) per share (in dollars per share)	$ (2.85)	$ 0.19	$ (2.70)	$ 0.61
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	$ 85,013	$ 213,924	$ 185,624
Cost of sales	84,826	66,341	167,686	145,169
Gross margin	21,834	18,672	46,238	40,455
Selling, general and administrative	9,710	12,106	22,114	24,603
Loss on disposal	114,900	0	114,900	0
Operating income (loss) from discontinued operations	(102,776)	6,566	(90,776)	15,852
Interest expense	5	23	6	61
Other (income) expense, net	3,443	873	4,268	(36)
Income (loss) from discontinued operations before income tax	(106,224)	5,670	(95,050)	15,827
Income tax (benefit) expense	(23,534)	960	(21,072)	393
Net income (loss) from discontinued operations	$ (82,690)	$ 4,710	$ (73,978)	$ 15,434