GOODWILL (Changes in Carrying Amount of Goodwill by Reportable Segment) (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Goodwill [Line Items]
Goodwill, Beginning balance	$ 3,167,061	$ 3,161,842
Goodwill, Ending balance	3,167,061	3,167,061
Aggregates [Member]
Goodwill [Line Items]
Goodwill, Beginning balance	3,075,428
Goodwill, Ending balance	3,075,428	3,075,428
Asphalt [Member]
Goodwill [Line Items]
Goodwill, Beginning balance	91,633
Goodwill, Ending balance	91,633	91,633
Concrete [Member]
Goodwill [Line Items]
Goodwill, Beginning balance	0
Goodwill, Ending balance	0	0
Calcium [Member]
Goodwill [Line Items]
Goodwill, Beginning balance	0
Goodwill, Ending balance	$ 0	$ 0