Business Segments (Tables)

12 Months Ended

Dec. 31, 2016

Segment Reporting [Abstract]

Financial Data for Continuing Operation For Corporation's Reportable Business Segments

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

Selected Financial Data by Business Segment

years ended December 31 (add 000) Total revenues	2016		2015		2014
Mid-America Group	$	1,017,098	$	926,251	$	848,855
Southeast Group		321,078		304,472		274,352
West Group		2,223,515		2,062,968		1,578,042
Total Building Materials Business		3,561,691		3,293,691		2,701,249
Magnesia Specialties		257,058		245,879		256,702
Total	$	3,818,749	$	3,539,570	$	2,957,951

years ended December 31 (add 000) Net sales	2016		2015		2014
Mid-America Group	$	945,123	$	851,854	$	770,568
Southeast Group		304,451		285,302		254,986
West Group		2,089,192		1,903,452		1,417,435
Total Building Materials Business		3,338,766		3,040,608		2,442,989
Magnesia Specialties		238,001		227,508		236,106
Total	$	3,576,767	$	3,268,116	$	2,679,095

Gross profit (loss)
Mid-America Group	$	306,560		$	257,002		$	215,245
Southeast Group		57,286			34,359			10,286
West Group		466,790			360,667			207,772
Total Building Materials Business		830,636			652,028			433,303
Magnesia Specialties		89,603			79,057			84,352
Corporate		(8,501	)		(4,165	)		1,969
Total	$	911,738		$	726,920		$	519,624

Selling, general and administrative expenses
Mid-America Group	$	52,712	$	52,227	$	52,274
Southeast Group		17,245		18,353		17,812
West Group		95,631		92,988		63,422
Total Building Materials Business		165,588		163,568		133,508
Magnesia Specialties		9,617		9,408		9,775
Corporate		66,401		37,778		24,819
Total	$	241,606	$	210,754	$	168,102

Earnings (Loss) from operations
Mid-America Group	$	258,422		$	207,619		$	170,513
Southeast Group		41,653			16,712			(5,685	)
West Group		379,417			256,042			193,024
Total Building Materials Business		679,492			480,373			357,852
Magnesia Specialties		79,306			69,301			74,564
Corporate		(81,532	)		(55,507	)		(105,484	)
Total	$	677,266		$	494,167		$	326,932

as of December 31 (add 000) Assets employed	2016		2015		2014
Mid-America Group	$	1,406,526	$	1,304,574	$	1,290,833
Southeast Group		594,967		583,369		604,044
West Group		4,904,018		4,561,432		4,896,199
Total Building Materials Business		6,905,511		6,449,375		6,791,076
Magnesia Specialties		150,969		147,795		150,359
Corporate		244,425		360,441		273,082
Total	$	7,300,905	$	6,957,611	$	7,214,517

years ended December 31 (add 000) Depreciation, depletion and amortization	2016		2015		2014
Mid-America Group	$	64,295	$	61,693	$	63,294
Southeast Group		30,590		31,644		31,955
West Group		164,653		147,619		104,903
Total Building Materials Business		259,538		240,956		200,152
Magnesia Specialties		12,865		13,769		10,394
Corporate		12,850		8,862		12,200
Total	$	285,253	$	263,587	$	222,746

Total property additions
Mid-America Group	$	152,014	$	77,640	$	76,753
Southeast Group		30,588		12,155		23,326
West Group		338,795		244,844		1,728,405
Total Building Materials Business		521,397		334,639		1,828,484
Magnesia Specialties		8,944		8,916		2,588
Corporate		10,430		20,561		15,349
Total	$	540,771	$	364,116	$	1,846,421

Property additions through acquisitions
Mid-America Group	$	1,524	$	4,385	$	—
Southeast Group		—		—		—
West Group		132,112		35,965		1,602,860
Total Building Materials Business		133,636		40,350		1,602,860
Magnesia Specialties		—		—		—
Corporate		—		—		—
Total	$	133,636	$	40,350	$	1,602,860

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 reside 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.  For the year ended December 31, 2016, the Corporation changed the presentation of the elimination of interproduct revenues and sales. Information for the years ended December 31, 2015 and 2014 have been conformed to the 2016 presentation.  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	2016			2015			2014
Aggregates	$	2,267,574		$	2,120,245		$	1,880,074
Cement		375,814			475,725			265,114
Ready Mixed Concrete		903,803			657,831			431,383
Asphalt and Paving		345,134			290,966			303,777
Less: Interproduct revenues		(330,634	)		(251,076	)		(179,099	)
Total Building Materials Business		3,561,691			3,293,691			2,701,249
Magnesia Specialties		257,058			245,879			256,702
Total	$	3,818,749		$	3,539,570		$	2,957,951
Net sales
Aggregates	$	2,060,876		$	1,896,143		$	1,644,265
Cement		364,445			455,382			252,911
Ready Mixed Concrete		902,635			656,531			430,673
Asphalt and Paving		341,444			283,628			294,239
Less: Interproduct sales		(330,634	)		(251,076	)		(179,099	)
Total Building Materials Business		3,338,766			3,040,608			2,442,989
Magnesia Specialties		238,001			227,508			236,106
Total	$	3,576,767		$	3,268,116		$	2,679,095
Gross profit (loss)
Aggregates	$	558,318		$	470,688		$	323,081
Cement		120,201			103,813			52,446
Ready Mixed Concrete		99,042			42,110			38,381
Asphalt and Paving		53,075			35,417			19,395
Total Building Materials Business		830,636			652,028			433,303
Magnesia Specialties		89,603			79,057			84,352
Corporate		(8,501	)		(4,165	)		1,969
Total	$	911,738		$	726,920		$	519,624

Domestic and Foreign Total Revenues

Domestic and foreign total revenues are as follows:

years ended December 31 (add 000)	2016		2015		2014
Domestic	$	3,761,651	$	3,493,462	$	2,912,115
Foreign		57,098		46,108		45,836
Total	$	3,818,749	$	3,539,570	$	2,957,951