GOODWILL (Tables)	9 Months Ended
	Sep. 30, 2021
GOODWILL [Abstract]
Changes in Carrying Amount of Goodwill by Reportable Segment	in thousandsAggregates Asphalt Concrete Calcium Total Goodwill Totals at December 31, 2020$    3,080,479  $     91,633  $              0  $              0  $    3,172,112  Goodwill of acquired businesses 1 185,981  316,670  502,651  Totals at September 30, 2021$    3,266,460  $     91,633  $   316,670  $              0  $    3,674,763  1See Note 16 for a summary of the current year acquisitions.