GOODWILL (Changes in Carrying Amount of Goodwill by Reportable Segment) (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2021 USD ($)
Goodwill [Line Items]
Goodwill, Beginning balance	$ 3,172,112
Goodwill of acquired businesses	502,651
Goodwill, Ending balance	3,674,763
Aggregates [Member]
Goodwill [Line Items]
Goodwill, Beginning balance	3,080,479
Goodwill of acquired businesses	185,981
Goodwill, Ending balance	3,266,460
Asphalt [Member]
Goodwill [Line Items]
Goodwill, Beginning balance	91,633
Goodwill, Ending balance	91,633
Concrete [Member]
Goodwill [Line Items]
Goodwill, Beginning balance	0
Goodwill of acquired businesses	316,670
Goodwill, Ending balance	316,670
Calcium [Member]
Goodwill [Line Items]
Goodwill, Beginning balance	0
Goodwill, Ending balance	$ 0