Goodwill (Tables)

9 Months Ended

Sep. 30, 2016

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, 2016
Balance at January 1, 2016	$	281,403	$	50,346	$	871,220		$	865,266	$	2,068,235
Acquisitions		—		—		92,442			—		92,442
Disposal		—		—		(72	)		—		(72	)
Balance at September 30, 2016	$	281,403	$	50,346	$	963,590		$	865,266	$	2,160,605