SEGMENT REPORTING (Segment Financial Disclosure) (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting Information [Line Items]
Total revenues		$ 1,240,197	$ 1,094,715	$ 3,294,822	$ 2,912,806
Gross profit		343,142	303,758	825,661	751,996
Depreciation, depletion, accretion and amortization		89,390	79,636	256,463	227,974
Cash and cash equivalents and restricted cash		43,069	701,163	43,069	701,163	$ 146,646	$ 268,019
Total assets		9,875,635	9,439,334	9,875,635	9,439,334	$ 9,504,891
Operating Segments [Member]
Segment Reporting Information [Line Items]
Total revenues		1,319,062	1,166,089	3,502,556	3,103,329
Total assets	[1]	9,724,532	8,567,156	9,724,532	8,567,156
Intersegment Sales [Member]
Segment Reporting Information [Line Items]
Total revenues		(78,865)	(71,374)	(207,734)	(190,523)
Aggregates [Member]
Segment Reporting Information [Line Items]
Total revenues		904,866	787,325	2,431,919	2,136,062
Aggregates [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total revenues	[2]	983,731	858,699	2,639,653	2,326,585
Gross profit	[3]	303,787	257,751	735,484	647,961
Depreciation, depletion, accretion and amortization		72,729	64,071	208,420	182,559
Total assets	[1]	8,890,421	7,974,915	8,890,421	7,974,915
Aggregates [Member] | Intersegment Sales [Member]
Segment Reporting Information [Line Items]
Total revenues		(78,865)	(71,374)	(207,734)	(190,523)
Asphalt [Member]
Segment Reporting Information [Line Items]
Total revenues		231,700	189,940	547,363	461,474
Asphalt [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total revenues	[4]	231,700	189,940	547,363	461,474
Gross profit	[3]	23,857	31,205	49,853	68,447
Depreciation, depletion, accretion and amortization		8,428	6,494	22,728	18,841
Total assets	[1]	551,336	355,171	551,336	355,171
Asphalt [Member] | Intersegment Sales [Member]
Segment Reporting Information [Line Items]
Total revenues		0	0	0	0
Concrete [Member]
Segment Reporting Information [Line Items]
Total revenues		101,719	115,485	309,404	309,448
Concrete [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total revenues		101,719	115,485	309,404	309,448
Gross profit	[3]	14,587	14,138	38,098	33,616
Depreciation, depletion, accretion and amortization		3,041	3,591	9,504	10,286
Total assets	[1]	278,487	233,565	278,487	233,565
Concrete [Member] | Intersegment Sales [Member]
Segment Reporting Information [Line Items]
Total revenues		0	0	0	0
Calcium [Member]
Segment Reporting Information [Line Items]
Total revenues		1,912	1,965	6,136	5,822
Calcium [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total revenues		1,912	1,965	6,136	5,822
Gross profit		911	664	2,226	1,972
Depreciation, depletion, accretion and amortization		68	180	207	567
Total assets	[1]	4,288	3,505	4,288	3,505
Calcium [Member] | Intersegment Sales [Member]
Segment Reporting Information [Line Items]
Total revenues		0	0	0	0
Other Segments [Member]
Segment Reporting Information [Line Items]
Depreciation, depletion, accretion and amortization		5,124	5,300	15,604	15,721
Corporate [Member]
Segment Reporting Information [Line Items]
Total assets		$ 108,034	$ 171,015	$ 108,034	$ 171,015

[1] Certain temporarily idled assets are included within a segment's Identifiable Assets but the associated DDA&A is shown within Other in the DDA&A section above as the related DDA&A is excluded from segment gross profit.

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

[3] The 2017 amounts have been revised as a result of our adoption of ASU 2017-07 as described in Note 17

[4] Includes product sales, as well as service revenues from our asphalt construction paving business.