CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Net income	$ 400,105	$ 217,679
Other comprehensive loss - net unrealized loss on cash flow hedging derivatives, net of income tax benefit of $82 for the three months ended March 31, 2026.	(260)
Comprehensive income	399,845	217,679
Comprehensive loss (income) attributable to noncontrolling interests	3,331	(528)
Comprehensive income attributable to Steel Dynamics, Inc.	$ 403,176	$ 217,151