Segments (Details) $ in Thousands	2 Months Ended	3 Months Ended		9 Months Ended
	Nov. 30, 2022 USD ($)	Nov. 30, 2022 USD ($)	Nov. 30, 2021 USD ($)	Nov. 30, 2022 USD ($) segment	Nov. 30, 2021 USD ($)	Feb. 28, 2022 USD ($)
Segment Reporting Information [Line Items]
Number of operating segments | segment				3
Operations and assets by segment
Revenues		$ 373,301	$ 135,083	$ 987,145	$ 395,732
Operating income:		45,393	21,290	137,443	62,677
Total assets:	$ 2,199,474	2,199,474		2,199,474		$ 1,133,027
Property, plant and equipment, net	491,367	491,367		491,367		193,358
Equity in (earnings) loss of unconsolidated subsidiaries		(1,006)	0	(1,006)	0
AIS Joint Venture
Operations and assets by segment
Equity method investments	82,420	82,420		82,420		0
AZZ Infrastructure Solutions | AIS Joint Venture
Operations and assets by segment
Equity in (earnings) loss of unconsolidated subsidiaries	(1,000)	(1,000)		(1,000)
United States
Operations and assets by segment
Revenues		363,660	127,462	951,855	370,910
Property, plant and equipment, net	471,279	471,279		471,279		167,634
International
Operations and assets by segment
Revenues		9,641	7,621	35,290	24,822
Canada
Operations and assets by segment
Property, plant and equipment, net	20,088	20,088		20,088		25,724
Corporate
Operations and assets by segment
Operating income:		(9,206)	(11,821)	(50,283)	(34,395)
Total assets:	53,150	53,150		53,150		46,266
Corporate | Precoat Metals Business Division | AZZ Infrastructure Solutions
Operations and assets by segment
Operating income:				15,200
AZZ Metal Coatings | Operating Segments
Operations and assets by segment
Revenues		158,274	135,083	487,567	395,732
Operating income:		33,546	33,111	123,812	97,072
Total assets:	579,830	579,830		579,830		578,885
AZZ Precoat Metals | Operating Segments
Operations and assets by segment
Revenues		215,027	0	499,578	0
Operating income:		21,053	$ 0	63,914	$ 0
Total assets:	1,484,074	1,484,074		1,484,074		0
AIS Joint Venture | Corporate
Operations and assets by segment
Total assets:	82,420	82,420		82,420		0
AZZ Infrastructure Solutions Segment | Corporate
Operations and assets by segment
Total assets:	$ 0	$ 0		$ 0		$ 507,876