Goodwill (Tables)

9 Months Ended

Sep. 30, 2015

Goodwill And Intangible Assets Disclosure [Abstract]

Changes in Goodwill

The following table shows the changes in goodwill by reportable segment and in total:

	(Dollars in Thousands)
	Mid-America			Southeast		West
	Group			Group		Group		Cement			Total
	Nine Months Ended September 30, 2015
Balance at January 1, 2015	$	282,117		$	50,346	$	852,436	$	883,900		$	2,068,799
Adjustments to purchase price allocations		—			—		15,538		(18,634	)		(3,096	)
Acquisitions		—			—		655		—			655
Divestitures		(714	)		—		—		—			(714	)
Balance at September 30, 2015	$	281,403		$	50,346	$	868,629	$	865,266		$	2,065,644