Comprehensive Loss Attributable to Martin Marietta Materials Incorporated (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Comprehensive Income (Loss)
Net loss attributable to Martin Marietta Materials, Inc.	$ (21,618)	$ (27,839)
Other comprehensive earnings, net of tax	1,370	1,221
Comprehensive loss attributable to Martin Marietta Materials, Inc.	$ (20,248)	$ (26,618)