GOODWILL AND INTANGIBLE ASSETS (Changes in Carrying Amount of Goodwill by Reportable Segment) (Details) - USD ($) $ in Thousands		12 Months Ended		24 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019
Goodwill [Line Items]
Goodwill, Beginning balance		$ 3,165,396	$ 3,122,321	$ 3,122,321
Goodwill of acquired businesses	[1]	1,665	43,075
Goodwill, Ending balance		3,167,061	3,165,396	3,167,061
Aggregates [Member]
Goodwill [Line Items]
Goodwill, Beginning balance		3,073,763	3,030,688	3,030,688
Goodwill of acquired businesses	[1]	1,665	43,075
Goodwill, Ending balance		3,075,428	3,073,763	3,075,428
Asphalt [Member]
Goodwill [Line Items]
Goodwill, Beginning balance		91,633	91,633	91,633
Goodwill of acquired businesses	[1]	0	0
Goodwill, Ending balance		91,633	91,633	91,633
Concrete [Member]
Goodwill [Line Items]
Goodwill, Beginning balance		0	0	0
Goodwill of acquired businesses	[1]	0	0
Goodwill, Ending balance		0	0	0
Calcium [Member]
Goodwill [Line Items]
Goodwill, Beginning balance		0	0	0
Goodwill of acquired businesses	[1]	0	0
Goodwill, Ending balance		$ 0	$ 0	$ 0

[1] See Note 19 for a summary of recent acquisitions.