CONSOLIDATED STATEMENTS OF EARNINGS AND COMPREHENSIVE EARNINGS (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Net sales	$ 345,150	$ 350,532
Freight and delivery revenues	39,850	43,442
Total revenues	385,000	393,974
Cost of sales	332,563	326,706
Freight and delivery costs	39,850	43,442
Total cost of revenues	372,413	370,148
Gross Profit	12,587	23,826
Selling, general & administrative expenses	37,649	33,029
Business development costs	307	25,901
Other operating (income) and expenses, net	(1,812)	223
Loss from Operations	(23,557)	(35,327)
Interest expense	13,496	13,487
Other nonoperating expenses and (income), net	623	(1,855)
Loss from continuing operations before taxes on income	(37,676)	(46,959)
Income tax benefit	(8,447)	(9,875)
Loss from Continuing Operations	(29,229)	(37,084)
Loss on discontinued operations, net of related tax benefit of $27 and $101, respectively	(100)	(589)
Consolidated net loss	(29,329)	(37,673)
Less: Net loss attributable to noncontrolling interests	(1,490)	(941)
Net Loss Attributable to Martin Marietta Materials, Inc.	(27,839)	(36,732)
Net Loss Attributable to Martin Marietta Materials, Inc.
Loss from continuing operations	(27,739)	(36,143)
Loss from discontinued operations	(100)	(589)
Net Loss Attributable to Martin Marietta Materials, Inc.	(27,839)	(36,732)
Consolidated Comprehensive Loss (See Note 1)
Loss attributable to Martin Marietta Materials, Inc.	(26,618)	(34,833)
Loss attributable to noncontrolling interests	(1,488)	(938)
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest, Total	$ (28,106)	$ (35,771)
Net Loss Attributable to Martin Marietta Materials, Inc. Per Common Share
Basic from continuing operations attributable to common shareholders	$ (0.61)	$ (0.80)
Discontinued operations attributable to common shareholders		$ (0.01)
Earnings Per Share, Basic, Total	$ (0.61)	$ (0.81)
Diluted from continuing operations attributable to common shareholders	$ (0.61)	$ (0.80)
Discontinued operations attributable to common shareholders		$ (0.01)
Earnings Per Share, Diluted, Total	$ (0.61)	$ (0.81)
Weighted-Average Common Shares Outstanding
Basic	46,028	45,734
Diluted	46,028	45,734
Cash Dividends Per Common Share	$ 0.40	$ 0.40