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Comprehensive Earnings Attributable to Martin Marietta Materials Incorporated (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Statement Of Income And Comprehensive Income [Abstract]    
Net earnings attributable to Martin Marietta Materials, Inc. $ 44,994 $ 6,126
Other comprehensive earnings (loss), net of tax 1,789 (564)
Earnings attributable to Martin Marietta Materials, Inc. $ 46,783 $ 5,562