CONSOLIDATED STATEMENTS OF EARNINGS AND COMPREHENSIVE EARNINGS (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Net Sales	$ 600,457	$ 537,507	$ 1,451,848	$ 1,376,944
Freight and delivery revenues	64,863	54,761	158,707	152,699
Total revenues	665,320	592,268	1,610,555	1,529,643
Cost of sales	457,349	413,485	1,188,923	1,126,532
Freight and delivery costs	64,863	54,761	158,707	152,699
Total cost of revenues	522,212	468,246	1,347,630	1,279,231
Gross Profit	143,108	124,022	262,925	250,412
Selling, general & administrative expenses	37,140	32,095	112,632	100,398
Business development costs	89		671	35,140
Other operating (income) and expenses, net	(2,964)	394	(5,535)	(1,070)
Earnings from Operations	108,843	91,533	155,157	115,944
Interest expense	13,518	13,224	40,633	39,967
Other nonoperating expenses and (income), net	101	620	179	(1,277)
Earnings from continuing operations before taxes on income	95,224	77,689	114,345	77,254
Income tax expense	22,915	13,701	29,615	12,484
Earnings from Continuing Operations	72,309	63,988	84,730	64,770
Loss on discontinued operations, net of related tax benefit of $185, $371, $250 and $547, respectively	(271)	(319)	(454)	(967)
Consolidated net earnings	72,038	63,669	84,276	63,803
Less: Net earnings (loss) attributable to noncontrolling interests	202	747	(1,028)	863
Net Earnings Attributable to Martin Marietta Materials, Inc.	71,836	62,922	85,304	62,940
Net Earnings Attributable to Martin Marietta Materials, Inc.
Earnings from continuing operations	72,107	63,241	85,758	63,907
Loss from discontinued operations	(271)	(319)	(454)	(967)
Net Earnings Attributable to Martin Marietta Materials, Inc.	71,836	62,922	85,304	62,940
Consolidated Comprehensive Earnings (See Note 1)
Comprehensive earnings attributable to Martin Marietta Materials, Inc.	75,384	66,082	88,763	69,350
Earnings (Loss) attributable to noncontrolling interests	205	750	(1,020)	873
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	$ 75,589	$ 66,832	$ 87,743	$ 70,223
Net Earnings (Loss) Attributable to Martin Marietta Materials, Inc. Per Common Share
Basic from continuing operations attributable to common shareholders	$ 1.56	$ 1.37	$ 1.85	$ 1.39
Discontinued operations attributable to common shareholders	$ (0.01)	$ (0.01)	$ (0.01)	$ (0.02)
Earnings Per Share, Basic, Total	$ 1.55	$ 1.36	$ 1.84	$ 1.37
Diluted from continuing operations attributable to common shareholders	$ 1.55	$ 1.37	$ 1.85	$ 1.38
Discontinued operations attributable to common shareholders	$ (0.01)	$ (0.01)	$ (0.01)	$ (0.02)
Earnings Per Share, Diluted, Total	$ 1.54	$ 1.36	$ 1.84	$ 1.36
Weighted-Average Common Shares Outstanding
Basic	46,244	45,860	46,134	45,792
Diluted	46,349	45,992	46,261	45,929
Cash Dividends Per Common Share	$ 0.40	$ 0.40	$ 1.20	$ 1.20