Consolidated Statements of Earnings and Comprehensive Earnings (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Total Revenues	$ 938,955	$ 802,004
Total Cost of Revenues	796,048	691,612
Gross Profit	142,907	110,392
Selling, general & administrative expenses	78,292	70,121
Acquisition-related expenses, net	144	711
Other operating (income) expenses, net	(4,750)	479
Earnings from Operations	69,221	39,081
Interest expense	32,948	35,087
Other nonoperating income, net	(1,562)	(8,503)
Earnings before income tax expense	37,835	12,497
Income tax (benefit) expense	(4,991)	2,457
Consolidated net earnings	42,826	10,040
Less: Net (loss) earnings attributable to noncontrolling interests	(27)	17
Net Earnings Attributable to Martin Marietta Materials, Inc.	42,853	10,023
Consolidated Comprehensive Earnings:
Earnings attributable to Martin Marietta Materials, Inc.	46,108	11,642
(Loss) Earnings attributable to noncontrolling interests	(27)	17
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	$ 46,081	$ 11,659
Net Earnings Attributable to Martin Marietta Materials, Inc. Per Common Share:
Basic attributable to common shareholders	$ 0.68	$ 0.16
Diluted attributable to common shareholders	$ 0.68	$ 0.16
Weighted-Average Common Shares Outstanding:
Basic	62,584	62,957
Diluted	62,777	63,222
Products and Services
Total Revenues	$ 878,305	$ 753,305
Total Cost of Revenues	734,168	641,620
Freight
Total Revenues	60,650	48,699
Total Cost of Revenues	$ 61,880	$ 49,992