v3.26.3
Operating Segments - Long-Lived Assets (Details) - USD ($)
$ in Thousands
Aug. 31, 2026
Feb. 28, 2026
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue and Long-Lived Asset [Line Items]    
Long-Lived Asset, Excluding Financial Instrument, Customer Relationship, Mortgage Servicing Right, Deferred Policy Acquisition Cost, and Deferred Tax Asset, Amount $ 707,885 $ 668,869
Intangible Asset, Excluding Goodwill, after Accumulated Amortization 417,978 409,738
Operating Segments | Metal Coatings    
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue and Long-Lived Asset [Line Items]    
Intangible Asset, Excluding Goodwill, after Accumulated Amortization 52,500 35,000
Operating Segments | Precoat Metals    
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue and Long-Lived Asset [Line Items]    
Intangible Asset, Excluding Goodwill, after Accumulated Amortization 365,500 374,800
United States    
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue and Long-Lived Asset [Line Items]    
Long-Lived Asset, Excluding Financial Instrument, Customer Relationship, Mortgage Servicing Right, Deferred Policy Acquisition Cost, and Deferred Tax Asset, Amount 686,934 647,182
Canada    
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue and Long-Lived Asset [Line Items]    
Long-Lived Asset, Excluding Financial Instrument, Customer Relationship, Mortgage Servicing Right, Deferred Policy Acquisition Cost, and Deferred Tax Asset, Amount $ 20,951 $ 21,687