Segments (Details) $ in Thousands	3 Months Ended
	May 31, 2022 USD ($) segment	May 31, 2021 USD ($)	Feb. 28, 2022 USD ($)
Segment Reporting Information [Line Items]
Number of operating segments | segment	3
Operations and assets by segment
Revenues	$ 314,398	$ 229,826
Operating income:	39,910	30,712
Total assets:	2,782,292		$ 1,133,028
Property, plant and equipment, net	491,722		230,848
United States
Operations and assets by segment
Revenues	281,589	191,116
Property, plant and equipment, net	456,409		194,539
International
Operations and assets by segment
Revenues	32,809	38,710
Canada
Operations and assets by segment
Property, plant and equipment, net	25,900		26,264
Other countries
Operations and assets by segment
Property, plant and equipment, net	9,413		10,045
Corporate
Operations and assets by segment
Operating income:	(24,024)	(10,488)
Total assets:	122,965		32,854
Metal Coatings | Operating Segments
Operations and assets by segment
Revenues	160,846	127,735
Operating income:	44,435	31,576
Total assets:	594,207		575,088
Precoat Metals | Operating Segments
Operations and assets by segment
Revenues	43,691	0
Operating income:	6,648	0
Total assets:	1,538,809		0
Infrastructure Solutions | Operating Segments
Operations and assets by segment
Revenues	109,861	102,091
Operating income:	12,851	$ 9,624
Total assets:	$ 526,311		$ 525,086