Business Segments (Tables)

6 Months Ended

Jun. 30, 2019

Segment Reporting [Abstract]

Financial Data for Continuing Operation for Company's Reportable Business Segments

The following table displays selected financial data for the Company’s reportable business segments. The Bluegrass Materials Company (Bluegrass) operations, acquired in April 2018, are located in the Mid-America Group and Southeast Group. Total revenues, as well as the consolidated statements of earnings and comprehensive earnings, exclude intersegment revenues which represent sales from one segment to another segment, which are eliminated.

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2019			2018			2019			2018
	(Dollars in Thousands)
Total revenues:
Mid-America Group	$	415,327		$	350,592		$	664,140		$	529,373
Southeast Group		137,024			112,963			256,262			193,202
West Group		650,878			665,886			1,147,708			1,139,608
Total Building Materials Business		1,203,229			1,129,441			2,068,110			1,862,183
Magnesia Specialties		76,239			72,962			150,313			142,224
Total	$	1,279,468		$	1,202,403		$	2,218,423		$	2,004,407
Products and services revenues:
Mid-America Group	$	382,717		$	325,578		$	613,025		$	493,468
Southeast Group		132,036			109,082			247,348			186,646
West Group		611,003			625,960			1,074,514			1,068,943
Total Building Materials Business		1,125,756			1,060,620			1,934,887			1,749,057
Magnesia Specialties		70,379			68,157			139,553			133,025
Total	$	1,196,135		$	1,128,777		$	2,074,440		$	1,882,082
Earnings (Loss) from operations:
Mid-America Group	$	141,678		$	108,709		$	172,633		$	114,876
Southeast Group		32,688			32,052			53,822			34,093
West Group		110,223			122,844			130,158			157,796
Total Building Materials Business		284,589			263,605			356,613			306,765
Magnesia Specialties		25,219			21,329			47,862			42,565
Corporate		(23,926	)		(20,981	)		(49,372	)		(46,296	)
Total	$	285,882		$	263,953		$	355,103		$	303,034

	June 30, 2019		December 31, 2018
Assets employed:	(Dollars in thousands)
Mid-America Group	$	2,906,227	$	2,788,454
Southeast Group		1,443,402		1,299,469
West Group		5,355,685		4,989,639
Total Building Materials Business		9,705,314		9,077,562
Magnesia Specialties		176,484		156,106
Corporate		281,859		317,751
Total	$	10,163,657	$	9,551,419