Consolidated Statements of Earnings and Comprehensive Earnings (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Net Sales	$ 601,937	$ 507,332	$ 981,615	$ 851,390
Freight and delivery revenues	67,288	53,994	116,240	93,844
Total revenues	669,225	561,326	1,097,855	945,234
Cost of sales	466,335	400,336	820,177	731,573
Freight and delivery costs	67,288	53,994	116,240	93,844
Total cost of revenues	533,623	454,330	936,417	825,417
Gross Profit	135,602	106,996	161,438	119,817
Selling, general & administrative expenses	36,566	37,843	70,813	75,492
Business development expenses	3,338	275	12,850	582
Acquisition integration expenses	1,942		2,210
Other operating income, net	(2,485)	(757)	(4,779)	(2,571)
Earnings from Operations	96,241	69,635	80,344	46,314
Interest expense	12,947	13,619	25,149	27,115
Other nonoperating (income) and expenses, net	(292)	(544)	3,171	78
Earnings from continuing operations before taxes on income	83,586	56,560	52,024	19,121
Income tax expense	23,906	15,098	15,482	6,700
Earnings from Continuing Operations	59,680	41,462	36,542	12,421
(Loss) Gain on discontinued operations, net of related tax (benefit) expense of ($24), $11, ($25) and ($65), respectively	(56)	105	(70)	(183)
Consolidated net earnings	59,624	41,567	36,472	12,238
Less: Net earnings (loss) attributable to noncontrolling interests	103	259	(1,432)	(1,230)
Net Earnings Attributable to Martin Marietta Materials, Inc.	59,521	41,308	37,904	13,468
Net Earnings Attributable to Martin Marietta Materials, Inc.:
Earnings from continuing operations	59,577	41,203	37,974	13,651
(Loss) Earnings from discontinued operations	(56)	105	(70)	(183)
Net Earnings Attributable to Martin Marietta Materials, Inc.	59,521	41,308	37,904	13,468
Consolidated Comprehensive Earnings: (See Note 1)
Comprehensive earnings attributable to Martin Marietta Materials, Inc.	60,124	39,999	39,877	13,380
Earnings (Loss) attributable to noncontrolling interests	104	262	(1,430)	(1,225)
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	$ 60,228	$ 40,261	$ 38,447	$ 12,155
Net Earnings Attributable to Martin Marietta Materials, Inc. Per Common Share:
Basic from continuing operations attributable to common shareholders	$ 1.28	$ 0.89	$ 0.81	$ 0.29
Discontinued operations attributable to common shareholders
Earnings Per Share, Basic, Total	$ 1.28	$ 0.89	$ 0.81	$ 0.29
Diluted from continuing operations attributable to common shareholders	$ 1.27	$ 0.89	$ 0.81	$ 0.29
Discontinued operations attributable to common shareholders
Earnings Per Share, Diluted, Total	$ 1.27	$ 0.89	$ 0.81	$ 0.29
Weighted-Average Common Shares Outstanding:
Basic	46,395	46,129	46,355	46,079
Diluted	46,529	46,260	46,477	46,217
Cash Dividends Per Common Share	$ 0.40	$ 0.40	$ 0.80	$ 0.80