Business Segments (Tables)

3 Months Ended

Mar. 31, 2015

Segment Reporting [Abstract]

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

9. Business Segments (Continued)

The following tables display selected financial data for continuing operations for the Corporation’s reportable business segments. Total revenues and net sales in the table below, as well as the consolidated statements of earnings and comprehensive earnings, do not include intersegment sales as these sales are eliminated.  

	Three Months Ended
	March 31,
	2015			2014
	(Dollars in Thousands)
Total revenues:
Mid-America Group	$	140,834		$	115,708
Southeast Group		64,678			59,820
West Group		320,571			190,787
Total Aggregates Business		526,083			366,315
Cement		102,100			—
Magnesia Specialties		63,164			62,314
Total	$	691,347		$	428,629
Net sales:
Mid-America Group	$	129,705		$	106,533
Southeast Group		59,770			55,381
West Group		287,082			160,416
Total Aggregates Business		476,557			322,330
Cement		96,565			—
Magnesia Specialties		58,754			57,348
Total	$	631,876		$	379,678
(Loss) Earnings from operations:
Mid-America Group	$	(4,203	)	$	(11,766	)
Southeast Group		(1,548	)		(6,111	)
West Group		14,499			2,081
Total Aggregates Business		8,748			(15,796	)
Cement		12,229			—
Magnesia Specialties		17,789			16,285
Corporate		(13,195	)		(16,387	)
Total	$	25,571		$	(15,898	)

Asset Employed for Continuing Operations for Corporations Reportable Business Segments

	March 31,		December 31,		March 31,
	2015		2014		2014
	(Dollars in Thousands)
Assets employed:
Mid-America Group	$	1,287,933	$	1,290,833	$	1,257,753
Southeast Group		597,461		604,044		607,219
West Group		2,490,726		2,444,400		1,024,038
Total Aggregates Business		4,376,120		4,339,277		2,889,010
Cement		2,422,119		2,451,799		—
Magnesia Specialties		147,745		150,359		153,070
Corporate		471,662		522,957		213,177
Total	$	7,417,646	$	7,464,392	$	3,255,257

Net Sales and Gross Profit by Line of Business

The Aggregates business includes the aggregates product line and aggregates-related downstream product lines, which include asphalt, ready mixed concrete and road paving product lines. All aggregates-related downstream product lines reside in the West Group. The following tables, which are reconciled to consolidated amounts, provide net sales and gross profit by line of business: Aggregates (further divided by product line), Cement and Magnesia Specialties.

	Three Months Ended
	March 31,
	2015			2014
	(Dollars in Thousands)
Net sales:
Aggregates	$	332,214		$	263,885
Asphalt		9,645			10,498
Ready Mixed Concrete		127,572			38,009
Road Paving		7,126			9,938
Total Aggregates Business		476,557			322,330
Cement		96,565		—
Magnesia Specialties		58,754			57,348
Total	$	631,876		$	379,678
Gross profit (loss):
Aggregates	$	41,417		$	10,051
Asphalt		(1,463	)		(1,426	)
Ready Mixed Concrete		2,084			2,944
Road Paving		(3,311	)		(3,982	)
Total Aggregates Business		38,727			7,587
Cement		18,985			—
Magnesia Specialties		20,178			18,755
Corporate		(3,629	)		(507	)
Total	$	74,261		$	25,835