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Description of the Business and Significant Accounting Policies - Goodwill (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Goodwill
Goodwill	$ 477,471	$ 477,471
Steel Operations
Goodwill
Goodwill	272,133
Aluminum Operations
Goodwill
Goodwill	14,000
Metals Recycling Operations
Goodwill
Goodwill	189,413
Steel Fabrication Operations
Goodwill
Goodwill	$ 1,925

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