Significant Accounting Policies (Tables)

6 Months Ended

Jun. 30, 2015

Significant Accounting Policies [Line Items]

Changes in Accumulated Other Comprehensive Earnings, Net of Tax

Changes in accumulated other comprehensive loss, net of tax, are as follows:  

	(Dollars in Thousands)
						Unamortized
						Value of
						Terminated			Accumulated
	Pension and					Forward Starting			Other
	Postretirement			Foreign		Interest Rate			Comprehensive
	Benefit Plans			Currency		Swap			Loss
	Three Months Ended June 30, 2015
Balance at beginning of period	$	(105,151	)	$	990	$	(2,562	)	$	(106,723	)
Other comprehensive (loss) earnings before      reclassifications, net of tax		(10,670	)		229		—			(10,441	)
Amounts reclassified from accumulated other      comprehensive loss, net of tax		4,158			—		192			4,350
Other comprehensive (loss) earnings, net of tax		(6,512	)		229		192			(6,091	)
Balance at end of period	$	(111,663	)	$	1,219	$	(2,370	)	$	(112,814	)
	Three Months Ended June 30, 2014
Balance at beginning of period	$	(44,267	)	$	4,816	$	(3,293	)	$	(42,744	)
Other comprehensive (loss) earnings before      reclassifications, net of tax		(426	)		842		—			416
Amounts reclassified from accumulated other      comprehensive earnings, net of tax		8			—		179			187
Other comprehensive (loss) earnings, net of tax		(418	)		842		179			603
Balance at end of period	$	(44,685	)	$	5,658	$	(3,114	)	$	(42,141	)

	(Dollars in Thousands)
							Unamortized
							Value of
							Terminated			Accumulated
	Pension and						Forward Starting			Other
	Postretirement			Foreign			Interest Rate			Comprehensive
	Benefit Plans			Currency			Swap			Loss
	Six Months Ended June 30, 2015
Balance at beginning of period	$	(106,688	)	$	3,278		$	(2,749	)	$	(106,159	)
Other comprehensive loss before      reclassifications, net of tax		(10,845	)		(2,059	)		—			(12,904	)
Amounts reclassified from accumulated      other comprehensive (loss) earnings, net of tax		5,870			—			379			6,249
Other comprehensive (loss) earnings, net of tax		(4,975	)		(2,059	)		379			(6,655	)
Balance at end of period	$	(111,663	)	$	1,219		$	(2,370	)	$	(112,814	)
	Six Months Ended June 30, 2014
Balance at beginning of period	$	(44,549	)	$	3,902		$	(3,467	)	$	(44,114	)
Other comprehensive (loss) earnings before      reclassifications, net of tax		(430	)		1,756			—			1,326
Amounts reclassified from accumulated      other comprehensive earnings, net of tax		294			—			353			647
Other comprehensive (loss) earnings, net of tax		(136	)		1,756			353			1,973
Balance at end of period	$	(44,685	)	$	5,658		$	(3,114	)	$	(42,141	)

Noncurrent Deferred Tax Assets Recorded In Accumulated Other Comprehensive Loss

1. Significant Accounting Policies (continued)

Consolidated Comprehensive Earnings/Loss and Accumulated Other Comprehensive Loss (continued)

Changes in net noncurrent deferred tax assets recorded in accumulated other comprehensive loss are as follows:

	(Dollars in Thousands)
	Pension and Postretirement Benefit Plans		Unamortized Value of Terminated Forward Starting Interest Rate Swap			Net Noncurrent Deferred Tax Assets
	Three Months Ended June 30, 2015
Balance at beginning of period	$	67,552	$	1,679		$	69,231
Tax effect of other comprehensive earnings		4,073		(125	)		3,948
Balance at end of period	$	71,625	$	1,554		$	73,179
	Three Months Ended June 30, 2014
Balance at beginning of period	$	29,016	$	2,155		$	31,171
Tax effect of other comprehensive earnings		271		(116	)		155
Balance at end of period	$	29,287	$	2,039		$	31,326
	Six Months Ended June 30, 2015
Balance at beginning of period	$	68,568	$	1,799		$	70,367
Tax effect of other comprehensive earnings		3,057		(245	)		2,812
Balance at end of period	$	71,625	$	1,554		$	73,179
	Six Months Ended June 30, 2014
Balance at beginning of period	$	29,198	$	2,269		$	31,467
Tax effect of other comprehensive earnings		89		(230	)		(141	)
Balance at end of period	$	29,287	$	2,039		$	31,326

Reclassification Out of Accumulated Other Comprehensive Loss

1. Significant Accounting Policies (continued)

Consolidated Comprehensive Earnings/Loss and Accumulated Other Comprehensive Loss (continued)

Reclassifications out of accumulated other comprehensive loss are as follows:

	Three Months Ended						Six Months Ended						Affected line items in the consolidated
	June 30,						June 30,						statements of earnings and
	2015			2014			2015			2014			comprehensive earnings
	(Dollars in Thousands)
Pension and postretirement      benefit plans
Amortization of:
Prior service credit	$	(469	)	$	(791	)	$	(939	)	$	(1,404	)
Actuarial loss		7,274			804			10,546			1,889
		6,805			13			9,607			485		Cost of sales; Selling, general      and administrative expenses
Tax benefit		(2,647	)		(5	)		(3,737	)		(191	)	Income tax benefit
	$	4,158		$	8		$	5,870		$	294
Unamortized value of terminated      forward starting interest      rate swap
Additional interest expense	$	317		$	295		$	624		$	583		Interest expense
Tax benefit		(125	)		(116	)		(245	)		(230	)	Income tax benefit
	$	192		$	179		$	379		$	353

Basic and Diluted Earnings (Loss) per Common Share

1. Significant Accounting Policies (continued)

Earnings per Common Share (continued)

The following table reconciles the numerator and denominator for basic and diluted earnings per common share:

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2015			2014			2015		2014
	(In Thousands)
Net earnings from continuing operations attributable to       Martin Marietta Materials, Inc.	$	81,938		$	59,577		$	88,065	$	37,974
Less: Distributed and undistributed earnings attributable to      unvested awards		(876	)		246			403		154
Basic and diluted net earnings available to common      shareholders from continuing operations attributable      to Martin Marietta Materials, Inc.		82,814			59,331			87,662		37,820
Basic and diluted net loss available to common      shareholders from discontinued operations		—			(56	)		—		(70	)
Basic and diluted net earnings available to common      shareholders attributable to Martin Marietta Materials, Inc.	$	82,814		$	59,275		$	87,662	$	37,750
Basic weighted-average common shares outstanding		67,373			46,395			67,392		46,355
Effect of dilutive employee and director awards		260			134			262		122
Diluted weighted-average common shares outstanding		67,633			46,529			67,654		46,477

Parent

Significant Accounting Policies [Line Items]

Comprehensive Earnings (Loss)

Comprehensive earnings attributable to Martin Marietta is as follows:

	Three Months Ended					Six Months Ended
	June 30,					June 30,
	2015			2014		2015			2014
	(Dollars in Thousands)
Net earnings attributable to Martin Marietta      Materials, Inc.	$	81,938		$	59,521	$	88,065		$	37,904
Other comprehensive (loss) earnings, net of tax		(6,091	)		603		(6,655	)		1,973
Comprehensive earnings attributable to      Martin Marietta Materials, Inc.	$	75,847		$	60,124	$	81,410		$	39,877

Noncontrolling Interests

Significant Accounting Policies [Line Items]

Comprehensive Earnings (Loss)

Comprehensive earnings (loss) attributable to noncontrolling interests, consisting of net earnings or loss and adjustments for the funded status of pension and postretirement benefit plans, is as follows:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2015		2014		2015		2014
	(Dollars in Thousands)
Net earnings (loss) attributable to noncontrolling interests	$	41	$	103	$	73	$	(1,432	)
Other comprehensive earnings, net of tax		2		1		5		2
Comprehensive earnings (loss) attributable to      noncontrolling interests	$	43	$	104	$	78	$	(1,430	)