GOODWILL (Tables)

9 Months Ended

Sep. 30, 2018

GOODWILL [Abstract]

Changes in Carrying Amount of Goodwill by Reportable Segment

in thousands	Aggregates	Asphalt	Concrete	Calcium	Total
Goodwill
Total as of December 31, 2017	$    3,030,688	$     91,633	$              0	$              0	$    3,122,321
Goodwill of acquired businesses 1	47,294	0	0	0	47,294
Total as of September 30, 2018	$    3,077,982	$     91,633	$              0	$              0	$    3,169,615

1 See Note 16 for a summary of acquisitions.