SEGMENT REPORTING (Narrative) (Details) $ in Thousands		3 Months Ended								12 Months Ended
		Dec. 31, 2019 USD ($)	Sep. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)	Mar. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Sep. 30, 2018 USD ($)	Jun. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)	Dec. 31, 2019 USD ($) state segment mi		Dec. 31, 2018 USD ($)		Dec. 31, 2017 USD ($)
Number of operating segments | segment										4
Number of reportable segments | segment										4
Revenues		$ 1,186,152	$ 1,418,758	$ 1,327,682	$ 996,511	$ 1,088,047	$ 1,240,197	$ 1,200,151	$ 854,474	$ 4,929,103	[1]	$ 4,382,869	[1]	$ 3,890,296	[1]
Radius for Delivering Product Maximum | mi										25
Radius for Delivering Product Minimum | mi										20
Concrete [Member]
Percentage of product weight attributable to Aggregates										80.00%
Revenues	[1]									$ 395,627		401,999		417,745
Number of states in which segments serve | state										5
Aggregates [Member]
Equity method investments		50,587				39,395				$ 50,587		39,395		22,967
Revenues	[1]									$ 3,669,464		3,239,578		2,842,737
Number of states in which segments serve | state										20
Number of additional states served | state										8
Asphalt [Member]
Percentage of product weight attributable to Aggregates										95.00%
Revenues	[1]									$ 855,821		733,182		622,074
Number of states in which segments serve | state										6
Asphalt [Member] | Asphalt Construction Paving [Member]
Number of states in which segments serve | state										3
United States [Member]
Revenues										$ 4,912,972		4,365,309		3,872,494
Nondomestic [Member]
Long-lived assets		$ 274,439				$ 278,520				274,439		278,520		211,282
Nondomestic [Member] | Aggregates [Member]
Revenues										16,131		17,560		17,802
Nondomestic [Member] | Asphalt, Concrete And Calcium [Member]
Revenues										$ 0		$ 0		$ 0

[1] ¹ The geographic markets are defined by states/countries as follows: East market — Arkansas, Delaware, Illinois, Kentucky, Maryland, North Carolina, Pennsylvania, Tennessee, Virginia, and Washington D.C. Gulf Coast market — Alabama, Florida, Georgia, Louisiana, Mexico, Mississippi, Oklahoma, South Carolina, Texas and the Bahamas West market — Arizona, California and New Mexico