SEGMENT REPORTING (Segment Financial Disclosure) (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016	Dec. 31, 2015
Segment Reporting Information [Line Items]
Total revenues		$ 1,030,763	$ 956,825	$ 1,818,091	$ 1,711,552
Gross profit		291,775	292,184	451,754	456,903
Depreciation, depletion, accretion and amortization		76,775	71,908	148,339	141,314
Cash and cash equivalents		1,129,799	91,902	1,129,799	91,902	$ 258,986	$ 284,060
Total assets		9,869,943	8,290,113	9,869,943	8,290,113	$ 8,471,475
Operating Segments [Member]
Segment Reporting Information [Line Items]
Total revenues		1,100,528	1,017,246	1,937,240	1,813,520
Total assets	[1]	8,527,698	8,175,084	8,527,698	8,175,084
Aggregates [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total revenues	[2]	817,586	791,497	1,467,886	1,426,365
Gross profit		252,791	254,008	392,953	402,392
Depreciation, depletion, accretion and amortization		60,832	59,414	118,488	116,925
Total assets	[1]	7,931,603	7,742,618	7,931,603	7,742,618
Aggregates [Member] | Intersegment sales [Member]
Segment Reporting Information [Line Items]
Total revenues		(69,765)	(60,421)	(119,149)	(101,968)
Asphalt [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total revenues		175,758	142,055	271,534	231,154
Gross profit		28,918	30,925	37,558	43,139
Depreciation, depletion, accretion and amortization		6,615	4,136	12,347	8,368
Total assets	[1]	358,801	237,546	358,801	237,546
Concrete [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total revenues		105,213	81,246	193,963	151,643
Gross profit		9,481	6,146	19,935	9,623
Depreciation, depletion, accretion and amortization		3,672	3,088	6,695	6,069
Total assets	[1]	233,355	189,355	233,355	189,355
Calcium [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total revenues		1,971	2,448	3,857	4,358
Gross profit		585	1,105	1,308	1,749
Depreciation, depletion, accretion and amortization		192	196	387	379
Total assets	[1]	3,939	5,565	3,939	5,565
Other Segments [Member]
Segment Reporting Information [Line Items]
Depreciation, depletion, accretion and amortization		5,464	5,074	10,422	9,573
Corporate [Member]
Segment Reporting Information [Line Items]
Total assets		$ 212,446	$ 23,127	$ 212,446	$ 23,127

[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 crushed stone, sand and gravel, sand, other aggregates, as well as freight, delivery and transportation revenues, and service revenues related to aggregates.