Discontinued Operations - Discontinued Operations in Consolidated Statements of Operations (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		9 Months Ended
	Sep. 30, 2022	Nov. 30, 2022	Nov. 30, 2021	Nov. 30, 2022	Nov. 30, 2021
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss on disposal		$ 45,010	$ 0	$ 159,910	$ 0
Net income (loss) from discontinued operations		$ (38,981)	$ 7,978	$ (112,947)	$ 23,412
Earnings per common share from discontinued operations:
Basic earnings (loss) per share (in dollars per share)		$ (1.57)	$ 0.32	$ (4.55)	$ 0.94
Diluted earnings (loss) per share (in dollars per share)		$ (1.56)	$ 0.32	$ (4.52)	$ 0.93
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	$ 96,654	$ 256,224	$ 282,278
Cost of sales		35,020	77,263	202,707	222,432
Gross margin		7,280	19,391	53,517	59,846
Selling, general and administrative		4,074	10,589	26,186	35,192
Loss on disposal	$ (114,900)	45,010	0	159,910	0
Operating income (loss) from discontinued operations		(41,804)	8,802	(132,579)	24,654
Interest expense		2	2	8	63
Other (income) expense, net		2,002	1,504	6,270	1,468
Income (loss) from discontinued operations before income tax		(43,808)	7,296	(138,857)	23,123
Income tax (benefit) expense		(4,827)	(682)	(25,910)	(289)
Net income (loss) from discontinued operations		$ (38,981)	$ 7,978	$ (112,947)	$ 23,412