REVENUES (Revenues by Geographic Market) (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2018	Mar. 31, 2017
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues		$ 854,474	$ 787,328
Operating Segments [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues		906,396	836,712
Intersegment sales [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues		(51,922)
East [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues		267,148
Gulf Coast [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues		425,726
West [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues		213,522
Aggregates [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues		647,735
Aggregates [Member] | Operating Segments [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1]	699,657	650,300
Aggregates [Member] | Intersegment sales [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues		(51,922)	(49,384)
Aggregates [Member] | East [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues		193,848
Aggregates [Member] | Gulf Coast [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues		383,941
Aggregates [Member] | West [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues		121,868
Asphalt [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues		103,835
Asphalt [Member] | Operating Segments [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues		103,835	95,776
Asphalt [Member] | Intersegment sales [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues		0
Asphalt [Member] | East [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues		11,729
Asphalt [Member] | Gulf Coast [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues		14,644
Asphalt [Member] | West [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues		77,462
Concrete [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues		100,962
Concrete [Member] | Operating Segments [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues		100,962	88,750
Concrete [Member] | Intersegment sales [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues		0
Concrete [Member] | East [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues		61,571
Concrete [Member] | Gulf Coast [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues		25,199
Concrete [Member] | West [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues		14,192
Calcium [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues		1,942
Calcium [Member] | Operating Segments [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues		1,942	$ 1,886
Calcium [Member] | Intersegment sales [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues		0
Calcium [Member] | East [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues		0
Calcium [Member] | Gulf Coast [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues		1,942
Calcium [Member] | West [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues		$ 0

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