SEGMENT REPORTING (Segment Financial Disclosure) (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016	Dec. 31, 2015
Segment Reporting Information [Line Items]
Total revenues		$ 1,094,715	$ 1,008,140	$ 2,912,806	$ 2,719,693
Gross profit		305,516	304,209	757,270	761,112
Depreciation, depletion, accretion and amortization		79,636	72,049	227,974	213,362
Cash and cash equivalents		701,163	135,365	701,163	135,365	$ 258,986	$ 284,060
Total assets		9,439,334	8,358,085	9,439,334	8,358,085	$ 8,471,475
Operating Segments [Member]
Segment Reporting Information [Line Items]
Total revenues		1,166,089	1,072,735	3,103,329	2,886,256
Total assets	[1]	8,567,156	8,108,692	8,567,156	8,108,692
Aggregates [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total revenues	[2]	858,699	821,809	2,326,585	2,248,174
Gross profit		259,122	261,762	652,075	664,154
Depreciation, depletion, accretion and amortization		64,071	60,204	182,559	177,129
Total assets	[1]	7,974,915	7,671,222	7,974,915	7,671,222
Aggregates [Member] | Intersegment sales [Member]
Segment Reporting Information [Line Items]
Total revenues		(71,374)	(64,595)	(190,523)	(166,563)
Asphalt [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total revenues		189,940	157,406	461,474	388,560
Gross profit		31,363	32,889	68,921	76,028
Depreciation, depletion, accretion and amortization		6,494	4,100	18,841	12,468
Total assets	[1]	355,171	243,909	355,171	243,909
Concrete [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total revenues		115,485	91,147	309,448	242,790
Gross profit		14,367	8,711	34,302	18,334
Depreciation, depletion, accretion and amortization		3,591	3,072	10,286	9,141
Total assets	[1]	233,565	188,169	233,565	188,169
Calcium [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total revenues		1,965	2,373	5,822	6,732
Gross profit		664	847	1,972	2,596
Depreciation, depletion, accretion and amortization		180	198	567	577
Total assets	[1]	3,505	5,392	3,505	5,392
Other Segments [Member]
Segment Reporting Information [Line Items]
Depreciation, depletion, accretion and amortization		5,300	4,475	15,721	14,047
Corporate [Member]
Segment Reporting Information [Line Items]
Total assets		$ 171,015	$ 114,028	$ 171,015	$ 114,028

[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.