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Significant Accounting Policies (Policies)

6 Months Ended

Jun. 30, 2018

Martin Marietta Materials, Inc. (the Company or Martin Marietta) is a natural resource-based building materials company. The Company supplies aggregates (crushed stone, sand and gravel) through its network of more than 300 quarries, mines and distribution yards to its customers in 30 states, Canada, the Bahamas and the Caribbean Islands. In the western United States, Martin Marietta also provides cement and downstream products, namely, ready mixed concrete, asphalt and paving services, in vertically-integrated structured markets where the Company has a leading aggregates position. The Company’s heavy-side building materials are used in infrastructure, nonresidential and residential construction projects. Aggregates are also used in agricultural, utility and environmental applications and as railroad ballast. The aggregates, cement, ready mixed concrete and asphalt and paving product lines are reported collectively as the “Building Materials” business.

The Company’s Building Materials business includes three reportable segments: the Mid-America Group, the Southeast Group and the West Group.

BUILDING MATERIALS BUSINESS
Reportable Segments	Mid-America Group	Southeast Group	West Group
Operating Locations	Indiana, Iowa, northern Kansas, Kentucky, Maryland, Minnesota, Missouri, eastern Nebraska, North Carolina, Ohio, Pennsylvania, South Carolina, Virginia, Washington and West Virginia	Alabama, Florida, Georgia, Tennessee, Nova Scotia and the Bahamas	Arkansas, Colorado, southern Kansas, Louisiana, western Nebraska, Nevada, Oklahoma, Texas, Utah and Wyoming

Product Lines	Aggregates	Aggregates	Aggregates, Cement, Ready Mixed Concrete, Asphalt and Paving

The Company has a Magnesia Specialties business with manufacturing facilities in Manistee, Michigan, and Woodville, Ohio. The Magnesia Specialties business produces magnesia-based chemicals products used in industrial, agricultural and environmental applications, and dolomitic lime sold primarily to customers in the steel and mining industries.

Basis of Presentation

The accompanying unaudited consolidated financial statements of the Company have been prepared in accordance with accounting principles generally accepted in the United States (U.S. GAAP) for interim financial information and with the instructions to the Quarterly Report on Form 10-Q and in Article 10 of Regulation S-X. Other than the required adoption of two new accounting pronouncements described below, the Company has continued to follow the accounting policies set forth in the audited consolidated financial statements and related notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2017. In the opinion of management, the interim consolidated financial information provided herein reflects all adjustments, consisting of normal recurring accruals, necessary for a fair statement of the results of operations, financial position and cash flows for the interim periods. The consolidated results of operations for the three- and six-months ended June 30, 2018 are not indicative of the results expected for other interim periods or the full year. The consolidated balance sheet at December 31, 2017 has been derived from the audited consolidated financial statements at that date but does not include all of the information and notes required by U.S. GAAP for complete financial statements. These consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2017.

New Accounting Pronouncements

Revenue from Contracts with Customers

Effective January 1, 2018, the Company adopted Accounting Standards Update (ASU) 2014-09, Revenue from Contracts with Customers (ASU 2014-09), which changes the evaluation and accounting for revenue recognition under contracts with customers and enhances financial statement disclosures. The Company implemented ASU 2014-09 using the modified retrospective approach. The adoption had an immaterial impact on the Company’s financial position and results of operations but required new disclosures (see Note 2).

Statement of Cash Flows: Classification of Certain Cash Receipts and Cash Payments

Effective January 1, 2018, the Company adopted ASU 2016-15, Statement of Cash Flows: Classification of Certain Cash Receipts and Cash Payments (ASU 2016-15), which provides clarification or additional guidance on certain transactions and its classification on the statement of cash flows on a retrospective basis. The adoption had an immaterial impact on the Company’s statement of cash flows.

Pending Accounting Pronouncement

Lease Standard

In February 2016, the Financial Accounting Standards Board (FASB) issued a new accounting standard, Accounting Codification Standard 842 – Leases, intending to improve financial reporting of leases and to provide more transparency into off-balance sheet leasing obligations. The guidance requires virtually all leases, excluding mineral interest leases, to be recorded on the balance sheet and provides guidance on the recognition of lease expense and income. The new standard is effective January 1, 2019. The FASB recently proposed to eliminate the need for retrospective presentation of comparative financial statements and to allow the use of certain practical expedients in the adoption of the new standard. The Company has developed an implementation plan and is currently gathering data to further assess the impact of the ASU on its financial statements. The adoption is anticipated to have a material impact on assets and liabilities due to the recognition of lease rights and obligations on its balance sheet effective January 1, 2019.

Consolidated Comprehensive Earnings/Loss and Accumulated Other Comprehensive Loss

Consolidated comprehensive earnings/loss and accumulated other comprehensive loss consist of consolidated net earnings or loss; adjustments for the funded status of pension and postretirement benefit plans; foreign currency translation adjustments; and the amortization of the value of terminated forward starting interest rate swap agreements into interest expense, and are presented in the Company’s consolidated statements of earnings and comprehensive earnings.

Comprehensive earnings attributable to Martin Marietta is as follows:

	Three-Months Ended				Six-Months Ended
	June 30,				June 30,
	2018		2017		2018		2017
	(Dollars in Thousands)
Net earnings attributable to Martin Marietta Materials, Inc.	$	185,377	$	142,279	$	195,400	$	184,613
Other comprehensive earnings, net of tax		1,602		2,519		3,221		4,781
Comprehensive earnings attributable to Martin Marietta Materials, Inc.	$	186,979	$	144,798	$	198,621	$	189,394

Comprehensive earnings attributable to noncontrolling interests, consisting of net earnings 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,
	2018		2017			2018		2017
	(Dollars in Thousands)
Net earnings (loss) attributable to noncontrolling interests	$	126	$	(38	)	$	143	$	(65	)
Other comprehensive earnings, net of tax		—		1			1		2
Comprehensive earnings (loss) attributable to noncontrolling interests	$	126	$	(37	)	$	144	$	(63	)

1.	Significant Accounting Policies (continued)

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

Changes in accumulated other comprehensive earnings (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, 2018
Balance at beginning of period	$	(126,806	)	$	(609	)	$	(70	)	$	(127,485	)
Other comprehensive loss before reclassifications, net of tax		—			(476	)		—			(476	)
Amounts reclassified from accumulated other comprehensive earnings, net of tax		2,008			—			70			2,078
Other comprehensive earnings (loss), net of tax		2,008			(476	)		70			1,602
Balance at end of period	$	(124,798	)	$	(1,085	)	$	—		$	(125,883	)

	Three-Months Ended June 30, 2017
Balance at beginning of period	$	(126,463	)	$	(1,025	)	$	(937	)	$	(128,425	)
Other comprehensive earnings before reclassifications, net of tax		—			389			—			389
Amounts reclassified from accumulated other comprehensive earnings, net of tax		1,910			—			220			2,130
Other comprehensive earnings, net of tax		1,910			389			220			2,519
Balance at end of period	$	(124,553	)	$	(636	)	$	(717	)	$	(125,906	)

1.	Significant Accounting Policies (continued)

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

	(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, 2018
Balance at beginning of period	$	(128,802	)	$	(22	)	$	(280	)	$	(129,104	)
Other comprehensive loss before reclassifications, net of tax		—			(1,063	)		—			(1,063	)
Amounts reclassified from accumulated other comprehensive earnings, net of tax		4,004			—			280			4,284
Other comprehensive earnings (loss), net of tax		4,004			(1,063	)		280			3,221
Balance at end of period	$	(124,798	)	$	(1,085	)	$	—		$	(125,883	)

	Six-Months Ended June 30, 2017
Balance at beginning of period	$	(128,373	)	$	(1,162	)	$	(1,152	)	$	(130,687	)
Other comprehensive earnings before reclassifications, net of tax		—			526			—			526
Amounts reclassified from accumulated other comprehensive earnings, net of tax		3,820			—			435			4,255
Other comprehensive earnings, net of tax		3,820			526			435			4,781
Balance at end of period	$	(124,553	)	$	(636	)	$	(717	)	$	(125,906	)

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, 2018
Balance at beginning of period	$	79,280		$	41		$	79,321
Tax effect of other comprehensive earnings		(661	)		(41	)		(702	)
Balance at end of period	$	78,619		$	-		$	78,619

	Three-Months Ended June 30, 2017
Balance at beginning of period	$	80,859		$	608		$	81,467
Tax effect of other comprehensive earnings		(1,184	)		(144	)		(1,328	)
Balance at end of period	$	79,675		$	464		$	80,139

	Six-Months Ended June 30, 2018
Balance at beginning of period	$	79,938		$	178		$	80,116
Tax effect of other comprehensive earnings		(1,319	)		(178	)		(1,497	)
Balance at end of period	$	78,619		$	-		$	78,619

	Six-Months Ended June 30, 2017
Balance at beginning of period	$	82,044		$	749		$	82,793
Tax effect of other comprehensive earnings		(2,369	)		(285	)		(2,654	)
Balance at end of period	$	79,675		$	464		$	80,139

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
	2018			2017			2018			2017			comprehensive earnings
	(Dollars in Thousands)
Pension and postretirement benefit plans
Amortization of:
Prior service credit	$	(400	)	$	(358	)		(985	)		(716	)
Actuarial loss		3,069			3,452			6,308			6,905
		2,669			3,094			5,323			6,189		Other nonoperating income, net
Tax benefit		(661	)		(1,184	)		(1,319	)		(2,369	)	Income tax expense
	$	2,008		$	1,910		$	4,004		$	3,820

Unamortized value of terminated forward starting interest rate swap
Additional interest expense	$	111		$	364		$	458		$	720		Interest expense
Tax benefit		(41	)		(144	)		(178	)		(285	)	Income tax expense
	$	70		$	220		$	280		$	435

Earnings per Common Share

The numerator for basic and diluted earnings per common share is net earnings attributable to Martin Marietta Materials, Inc. reduced by dividends and undistributed earnings attributable to certain of the Company’s stock-based compensation. If there is a net loss, no amount of the undistributed loss is attributed to unvested participating securities. The denominator for basic earnings per common share is the weighted-average number of common shares outstanding during the period. Diluted earnings per common share are computed assuming that the weighted-average number of common shares is increased by the conversion, using the treasury stock method, of awards to be issued to employees and nonemployee members of the Company’s Board of Directors under certain stock-based compensation arrangements if the conversion is dilutive. For the three- and six-months ended June 30, 2018 and 2017, the diluted per-share computations reflect the number of common shares outstanding to include the number of additional shares that would have been outstanding if the potentially dilutive common shares had been issued.

1.	Significant Accounting Policies (continued)

Earnings per Common Share

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,
	2018		2017		2018		2017
	(In Thousands)
Net earnings attributable to Martin Marietta Materials, Inc.	$	185,377	$	142,279	$	195,400	$	184,613
Less: Distributed and undistributed earnings attributable to unvested awards		317		413		378		553
Basic and diluted net earnings available to common shareholders attributable to Martin Marietta Materials, Inc.	$	185,060	$	141,866	$	195,022	$	184,060

Basic weighted-average common shares outstanding		63,021		62,858		62,989		62,961
Effect of dilutive employee and director awards		264		283		264		285
Diluted weighted-average common shares outstanding		63,285		63,141		63,253		63,246