CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Current assets
Cash and equivalents	$ 243,753	$ 375,917
Investments in short-term commercial paper		31,520
Accounts receivable, net	725,105	599,499
Accounts receivable-related parties	48,022	42,864
Inventories	1,168,499	1,202,507
Deferred income taxes	23,682	23,449
Other current assets	33,028	20,469
Total current assets	2,242,089	2,296,225
Property, plant and equipment, net	2,232,852	2,231,198
Restricted cash	23,231	27,749
Intangible assets, net	401,104	416,635
Goodwill	735,281	738,542
Other assets	101,353	105,067
Total assets	5,735,910	5,815,416
Current liabilities
Accounts payable	355,678	344,953
Accounts payable-related parties	8,652	15,144
Income taxes payable	2,862	16,941
Accrued payroll and benefits	65,698	85,802
Accrued interest	32,509	35,306
Accrued expenses	80,209	81,900
Current maturities of long-term debt	324,241	29,631
Total current liabilities	869,849	609,677
Long-term debt
Term note	233,750	247,500
Senior notes	1,500,000	1,600,000
Convertible senior notes		287,496
Other long-term debt	40,493	37,610
Total long-term debt	1,774,243	2,172,606
Deferred income taxes	556,023	537,304
Other liabilities	20,324	19,173
Commitments and contingencies
Redeemable noncontrolling interests	104,734	98,814
Equity
Common stock voting, $.0025 par value; 900,000,000 shares authorized; 256,630,645 and 255,592,901 shares issued; and 220,665,831 and 219,522,655 shares outstanding, as of June 30, 2013 and December 31, 2012, respectively	640	637
Treasury stock, at cost; 35,964,814 and 36,070,246 shares, as of June 30, 2013 and December 31, 2012, respectively	(718,373)	(720,479)
Additional paid-in capital	1,050,470	1,037,687
Retained earnings	2,116,262	2,087,620
Total Steel Dynamics, Inc. equity	2,448,999	2,405,465
Noncontrolling interests	(38,262)	(27,623)
Total equity	2,410,737	2,377,842
Total liabilities and equity	$ 5,735,910	$ 5,815,416