REVENUES (Narrative) (Details) $ in Thousands		3 Months Ended		6 Months Ended		12 Months Ended
		Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($) item	Jun. 30, 2019 USD ($)	Dec. 31, 2013 USD ($)	Dec. 31, 2012 USD ($)	Jun. 30, 2021 USD ($)	Mar. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Mar. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Revenue Recognition [Line Items]
Revenues	[1]	$ 1,322,575	$ 1,327,682	$ 2,371,817	$ 2,324,193
Number of quarries | item				8
Proceeds from sale of future production						$ 226,926	$ 226,926
Term of the VPPs				25 years
Estimated deferred revenue to be recognized in the next 12 months		181,963	189,052	$ 181,963	189,052				$ 183,997	$ 185,339	$ 191,131	$ 192,783
Service [Member]
Revenue Recognition [Line Items]
Revenues		57,374	65,257	$ 96,938	99,772
Minimum [Member]
Revenue Recognition [Line Items]
Coverage of warranty provisions				9 months
Maximum [Member]
Revenue Recognition [Line Items]
Coverage of warranty provisions				1 year
Maximum [Member] | Construction Paving [Member]
Revenue Recognition [Line Items]
Costs for paving contracts expense, expected amortization period				1 year
Forecast [Member]
Revenue Recognition [Line Items]
Estimated deferred revenue to be recognized in the next 12 months								$ 7,500
Aggregates [Member]
Revenue Recognition [Line Items]
Revenues	[1]	$ 997,053	$ 974,748	$ 1,809,715	$ 1,753,581
Aggregates [Member] | Minimum [Member]
Revenue Recognition [Line Items]
Percent of shipments used for publicly funded construction				45.00%
Aggregates [Member] | Maximum [Member]
Revenue Recognition [Line Items]
Percent of shipments used for publicly funded construction				55.00%

[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 and Texas West market — Arizona, California and New Mexico