GOODWILL (Tables)

3 Months Ended

Mar. 31, 2019

GOODWILL [Abstract]

Changes in Carrying Amount of Goodwill by Reportable Segment

in thousands	Aggregates	Asphalt	Concrete	Calcium	Total
Goodwill
Total as of December 31, 2018	$    3,073,763	$     91,633	$              0	$              0	$    3,165,396
Goodwill of acquired businesses 1	(3,554)	0	0	0	(3,554)
Total as of March 31, 2019	$    3,070,209	$     91,633	$              0	$              0	$    3,161,842

1 See Note 16 for a summary of prior year acquisitions.