SEGMENT REPORTING (Segment Financial Disclosure) (Details) $ in Thousands		1 Months Ended	3 Months Ended								12 Months Ended
		Jan. 31, 2015 property	Dec. 31, 2016 USD ($)	Sep. 30, 2016 USD ($)	Jun. 30, 2016 USD ($)	Mar. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Sep. 30, 2015 USD ($)	Jun. 30, 2015 USD ($)	Mar. 31, 2015 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Segment Reporting Information [Line Items]
Total revenues			$ 872,974	$ 1,008,140	$ 956,825	$ 754,728	$ 857,285	$ 1,038,460	$ 895,143	$ 631,293	$ 3,592,667	$ 3,422,181	$ 2,994,169
Gross profit			239,706	$ 304,209	$ 292,184	$ 164,718	253,929	$ 291,290	$ 234,449	$ 77,865	1,000,817	857,533	587,582
Depreciation, depletion, accretion and amortization											284,940	274,823	279,497
Capital Expenditures	[1]										344,941	304,024	223,097
Cash and cash equivalents			258,986				284,060				258,986	284,060	141,273	$ 193,738
Total assets			8,471,475				8,301,632				8,471,475	8,301,632	8,041,097
Operating Segments [Member]
Segment Reporting Information [Line Items]
Total revenues											3,813,130	3,616,298	3,192,787
Total assets	[2]		8,046,371				7,995,691				8,046,371	7,995,691	7,808,326
Aggregates [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total revenues	[3]										2,961,835	2,777,758	2,346,411
Gross profit											873,118	755,666	544,070
Depreciation, depletion, accretion and amortization											236,472	228,466	227,042
Capital Expenditures	[1]										297,737	269,014	180,026
Total assets	[2]		7,589,225				7,540,273				7,589,225	7,540,273	7,311,336
Aggregates [Member] | Intersegment sales [Member]
Segment Reporting Information [Line Items]
Total revenues											(220,463)	(194,117)	(189,393)
Asphalt Mix [Member]
Segment Reporting Information [Line Items]
Number of asphalt mix plants | property		13
Asphalt Mix [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total revenues	[4]										512,310	530,692	445,538
Gross profit	[4]										97,682	78,225	38,080
Depreciation, depletion, accretion and amortization	[4]										16,797	16,378	10,719
Capital Expenditures	[1],[4]										29,002	8,111	20,796
Total assets	[2],[4]		259,514				251,716				259,514	251,716	264,172
Concrete [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total revenues	[4],[5]										330,125	299,252	375,806
Gross profit	[4],[5]										26,543	20,152	2,233
Depreciation, depletion, accretion and amortization	[4],[5]										12,129	11,374	19,892
Capital Expenditures	[1],[4],[5]										10,047	19,053	19,542
Total assets	[2],[4],[5]		192,673				198,193				192,673	198,193	227,000
Calcium [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total revenues	[6]										8,860	8,596	25,032
Gross profit	[6]										3,474	3,490	3,199
Depreciation, depletion, accretion and amortization	[6]										774	679	1,554
Capital Expenditures	[1],[6]										534	0	201
Total assets	[2],[6]		4,959				5,509				4,959	5,509	5,818
Calcium [Member] | Intersegment sales [Member]
Segment Reporting Information [Line Items]
Total revenues											0	0	(9,225)
Other Segments [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Depreciation, depletion, accretion and amortization											18,768	17,926	20,290
Corporate [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	[1]										7,621	7,846	2,532
Total assets			$ 166,118				$ 21,881				$ 166,118	$ 21,881	$ 91,498

[1] Capital expenditures include capitalized replacements of and additions to property, plant & equipment, including capitalized leases, renewals and betterments. Capital expenditures exclude property, plant & equipment obtained by business acquisitions.

[2] 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.

[3] Includes product sales, as well as freight, delivery and transportation revenues, and other revenues related to services.

[4] In January 2015, we exchanged our California ready-mixed concrete operations for 13 asphalt mix plants, primarily in Arizona (see Note 19).

[5] In March 2014, we sold our concrete business in the Florida area (see Note 19).

[6] Includes cement and calcium products. In March 2014, we sold our cement business (see Note 19).