Description of the Business and Significant Accounting Policies (Goodwill) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Dec. 31, 2021
Goodwill
Goodwill	$ 452,341	$ 453,835
Steel Operations
Goodwill
Goodwill	272,133	272,133
Metals Recycling Operations
Goodwill
Goodwill	178,283	179,777
Metals Recycling Operations | OmniSource
Goodwill
Goodwill decrease due to tax benefit related to the normal amortization of the component	1,500
Steel Fabrication Operations
Goodwill
Goodwill	$ 1,925	$ 1,925