Segments (Tables)

12 Months Ended

Dec. 31, 2017

Segment Reporting [Abstract]

Financial Data for Continuing Operation for Company's Reportable Segments

The following tables display selected financial data for the Company’s reportable segments.

years ended December 31 (add 000) Total revenues	2017		2016		2015
Mid-America Group	$	1,053,325	$	1,017,098	$	926,251
Southeast Group		362,555		321,078		304,472
West Group		2,279,723		2,223,515		2,062,968
Total Building Materials Business		3,695,603		3,561,691		3,293,691
Magnesia Specialties		269,991		257,058		245,879
Total	$	3,965,594	$	3,818,749	$	3,539,570

years ended December 31 (add 000) Net sales	2017		2016		2015
Mid-America Group	$	982,109	$	945,123	$	851,854
Southeast Group		348,409		304,451		285,302
West Group		2,142,839		2,089,192		1,903,452
Total Building Materials Business		3,473,357		3,338,766		3,040,608
Magnesia Specialties		248,071		238,001		227,508
Total	$	3,721,428	$	3,576,767	$	3,268,116

Gross profit (loss)
Mid-America Group	$	335,394	$	306,560		$	257,002
Southeast Group		74,642		57,286			34,359
West Group		465,595		466,790			360,667
Total Building Materials Business		875,631		830,636			652,028
Magnesia Specialties		89,399		89,603			79,057
Corporate		6,910		(8,501	)		(4,165	)
Total	$	971,940	$	911,738		$	726,920

Selling, general and administrative expenses
Mid-America Group	$	53,937	$	52,712	$	52,227
Southeast Group		17,144		17,245		18,353
West Group		102,650		95,631		92,988
Total Building Materials Business		173,731		165,588		163,568
Magnesia Specialties		9,537		9,617		9,408
Corporate		78,860		66,401		37,778
Total	$	262,128	$	241,606	$	210,754

Earnings (Loss) from operations
Mid-America Group	$	284,789		$	258,422		$	207,619
Southeast Group		61,238			41,653			16,712
West Group		360,544			379,417			256,042
Total Building Materials Business		706,571			679,492			480,373
Magnesia Specialties		79,431			79,306			69,301
Corporate		(85,621	)		(81,532	)		(55,507	)
Total	$	700,381		$	677,266		$	494,167

as of December 31 (add 000) Assets employed	2017		2016		2015
Mid-America Group	$	1,532,867	$	1,406,526	$	1,304,574
Southeast Group		616,344		594,967		583,369
West Group		5,014,231		4,904,018		4,561,432
Total Building Materials Business		7,163,442		6,905,511		6,449,375
Magnesia Specialties		152,257		150,969		147,795
Corporate		1,676,812		244,425		360,441
Total	$	8,992,511	$	7,300,905	$	6,957,611

years ended December 31 (add 000) Depreciation, depletion and amortization	2017		2016		2015
Mid-America Group	$	69,691	$	64,295	$	61,693
Southeast Group		30,780		30,590		31,644
West Group		169,853		164,653		147,619
Total Building Materials Business		270,324		259,538		240,956
Magnesia Specialties		10,070		10,354		9,992
Corporate		16,768		15,361		12,639
Total	$	297,162	$	285,253	$	263,587

Total property additions
Mid-America Group	$	139,505	$	152,014	$	77,640
Southeast Group		34,636		30,588		12,155
West Group		240,793		338,795		244,844
Total Building Materials Business		414,934		521,397		334,639
Magnesia Specialties		11,129		8,944		8,916
Corporate		12,558		10,430		20,561
Total	$	438,621	$	540,771	$	364,116

Property additions through acquisitions
Mid-America Group	$	60	$	1,524	$	4,385
Southeast Group		—		—		—
West Group		2,420		132,112		35,965
Total Building Materials Business		2,480		133,636		40,350
Magnesia Specialties		—		—		—
Corporate		—		—		—
Total	$	2,480	$	133,636	$	40,350

Total Revenues, Net Sales and Gross Profit by Product Line

The Building Materials business includes the aggregates, cement, ready mixed concrete and asphalt and paving product lines. All cement, ready mixed concrete and asphalt and paving product lines are reported within in the West Group. The following tables, which are reconciled to consolidated amounts, provide total revenues, net sales and gross profit by line of business: Building Materials (further divided by product line) and Magnesia Specialties. Interproduct revenues and interproduct sales represent sales from the aggregates product line to the ready mixed concrete and asphalt and paving product lines and sales from the cement product line to the ready mixed concrete product line.  

years ended December 31 (add 000) Total revenues	2017			2016			2015
Aggregates	$	2,341,540		$	2,267,574		$	2,120,245
Cement		384,112			375,814			475,725
Ready Mixed Concrete		936,979			903,803			657,831
Asphalt and Paving1		296,956			261,612			229,561
Less: Interproduct revenues1		(263,984	)		(247,112	)		(189,671	)
Total Building Materials Business		3,695,603			3,561,691			3,293,691
Magnesia Specialties		269,991			257,058			245,879
Total	$	3,965,594		$	3,818,749		$	3,539,570
Net sales
Aggregates	$	2,137,225		$	2,060,876		$	1,896,143
Cement		371,525			364,445			455,382
Ready Mixed Concrete		936,062			902,635			656,531
Asphalt and Paving1		292,529			257,922			222,223
Less: Interproduct sales1		(263,984	)		(247,112	)		(189,671	)
Total Building Materials Business		3,473,357			3,338,766			3,040,608
Magnesia Specialties		248,071			238,001			227,508
Total	$	3,721,428		$	3,576,767		$	3,268,116
12016 and 2015 amounts have been revised to reflect the elimination of $83,500,000 and $61,400,000, respectively, of asphalt sales to the paving operations within that product line.
Gross profit (loss)
Aggregates	$	601,968		$	558,318		$	470,688
Cement		117,313			120,201			103,813
Ready Mixed Concrete		91,670			99,042			42,110
Asphalt and Paving		64,680			53,075			35,417
Total Building Materials Business		875,631			830,636			652,028
Magnesia Specialties		89,399			89,603			79,057
Corporate		6,910			(8,501	)		(4,165	)
Total	$	971,940		$	911,738		$	726,920

Domestic and Foreign Total Revenues

Domestic and foreign total revenues are as follows:

years ended December 31 (add 000)	2017		2016		2015
Domestic	$	3,901,323	$	3,761,651	$	3,493,462
Foreign		64,271		57,098		46,108
Total	$	3,965,594	$	3,818,749	$	3,539,570