REVENUES (Narrative) (Details) $ in Thousands		3 Months Ended		12 Months Ended
		Mar. 31, 2021 USD ($) item	Mar. 31, 2020 USD ($)	Dec. 31, 2013 USD ($)	Dec. 31, 2012 USD ($)	Mar. 31, 2022 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Revenue Recognition [Line Items]
Revenues	[1]	$ 1,068,344	$ 1,049,242
Number of quarries | item		8
Proceeds from sale of future production				$ 226,926	$ 226,926
Term of the VPPs		20 years
Estimated deferred revenue to be recognized in the next 12 months		$ 176,293	183,997				$ 177,962	$ 185,339
Service [Member]
Revenue Recognition [Line Items]
Revenues		$ 41,240	39,564
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]	$ 837,758	$ 812,662
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