REVENUES (Revenues by Geographic Market) (Details) - USD ($) $ in Thousands		3 Months Ended								12 Months Ended
		Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018		Dec. 31, 2017		Dec. 31, 2016
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues		$ 1,088,047	$ 1,240,197	$ 1,200,151	$ 854,474	$ 977,490	$ 1,094,715	$ 1,030,763	$ 787,328	$ 4,382,869	[1]	$ 3,890,296	[1]	$ 3,592,667	[1]
Operating Segments [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]									4,656,940		4,143,653		3,813,130
Intersegment Sales [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]									(274,071)		(253,357)		(220,463)
East [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]									1,523,330		1,402,923		1,198,293
Gulf Coast [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]									2,033,447		1,703,272		1,707,910
West [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]									1,100,163		1,037,458		906,927
Aggregates [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]									3,239,578		2,842,737		2,741,372
Aggregates [Member] | Operating Segments [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1],[2]									3,513,649		3,096,094		2,961,835
Aggregates [Member] | Intersegment Sales [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]									(274,071)		(253,357)		(220,463)
Aggregates [Member] | East [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]									1,109,489		1,045,682		994,559
Aggregates [Member] | Gulf Coast [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]									1,821,853		1,512,505		1,497,762
Aggregates [Member] | West [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]									582,307		537,907		469,514
Asphalt [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]									733,182		622,074		512,310
Asphalt [Member] | Operating Segments [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]									733,182		622,074		512,310
Asphalt [Member] | Intersegment Sales [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]									0		0		0
Asphalt [Member] | East [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]									156,591		112,673		0
Asphalt [Member] | Gulf Coast [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]									131,745		80,311		102,035
Asphalt [Member] | West [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]									444,846		429,090		410,275
Concrete [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]									401,999		417,745		330,125
Concrete [Member] | Operating Segments [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]									401,999		417,745		330,125
Concrete [Member] | Intersegment Sales [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]									0		0		0
Concrete [Member] | East [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]									257,250		244,568		203,734
Concrete [Member] | Gulf Coast [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]									71,739		102,716		99,253
Concrete [Member] | West [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]									73,010		70,461		27,138
Calcium [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]									8,110		7,740		8,860
Calcium [Member] | Operating Segments [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]									8,110		7,740		8,860
Calcium [Member] | Intersegment Sales [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]									0		0		0
Calcium [Member] | East [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]									0		0		0
Calcium [Member] | Gulf Coast [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]									8,110		7,740		8,860
Calcium [Member] | West [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]									$ 0		$ 0		$ 0

[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 BahamasWest market - Arizona, California and New Mexico

[2] Includes product sales, as well as freight & delivery costs that we pass along to our customers, and service revenues (see Note 2) related to aggregates.