REVENUES (Revenues by Geographic Market) (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues		$ 1,200,151	$ 1,030,763	$ 2,054,625	$ 1,818,091
Operating Segments [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues		1,277,098	1,100,528	2,183,494	1,937,240
Intersegment Sales [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues		(76,947)	(69,765)	(128,869)	(119,149)
East [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues		432,189	370,726	688,702	616,813
Gulf Coast [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues		553,177	436,709	989,537	850,150
West [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues		291,732	293,093	505,255	470,277
Aggregates [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues		879,318	747,821	1,527,053	1,348,737
Aggregates [Member] | Operating Segments [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]	956,265	817,586	1,655,922	1,467,886
Aggregates [Member] | Intersegment Sales [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues		(76,947)	(69,765)	(128,869)	(119,149)
Aggregates [Member] | East [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues		313,245	281,304	496,459	463,762
Aggregates [Member] | Gulf Coast [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues		493,696	384,793	888,271	752,006
Aggregates [Member] | West [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues		149,324	151,489	271,192	252,118
Asphalt [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues		211,828	175,758	315,663	271,534
Asphalt [Member] | Operating Segments [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues		211,828	175,758	315,663	271,534
Asphalt [Member] | Intersegment Sales [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues		0	0	0	0
Asphalt [Member] | East [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues		49,339	29,775	61,068	39,154
Asphalt [Member] | Gulf Coast [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues		38,845	24,444	53,488	42,480
Asphalt [Member] | West [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues		123,644	121,539	201,107	189,900
Concrete [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues		106,723	105,213	207,685	193,963
Concrete [Member] | Operating Segments [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues		106,723	105,213	207,685	193,963
Concrete [Member] | Intersegment Sales [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues		0	0	0	0
Concrete [Member] | East [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues		69,605	59,647	131,175	113,897
Concrete [Member] | Gulf Coast [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues		18,354	25,501	43,554	51,807
Concrete [Member] | West [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues		18,764	20,065	32,956	28,259
Calcium [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues		2,282	1,971	4,224	3,857
Calcium [Member] | Operating Segments [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues		2,282	1,971	4,224	3,857
Calcium [Member] | Intersegment Sales [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues		0	0	0	0
Calcium [Member] | East [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues		0	0	0	0
Calcium [Member] | Gulf Coast [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues		2,282	1,971	4,224	3,857
Calcium [Member] | West [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues		$ 0	$ 0	$ 0	$ 0

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