SEGMENT REPORTING (Segment Financial Disclosure) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013		Dec. 31, 2013	Dec. 31, 2012
Segment Reporting Information [Line Items]
Net sales	$ 756,289		$ 696,078		$ 1,304,785		$ 1,200,632
Delivery revenues	34,854		42,655		60,778		76,263
Total revenues	791,143		738,733		1,365,563		1,276,895
Gross profit	174,788		132,895		208,881		150,550
Depreciation, depletion, accretion and amortization	68,323		76,961		137,702		152,557
Cash items	227,684		86,979		227,684		86,979		193,738	275,478
Total assets	7,933,898		8,120,224		7,933,898		8,120,224		8,259,143
Identifiable assets
Segment Reporting Information [Line Items]
Total assets	7,596,000	[1]	7,943,700	[1]	7,596,000	[1]	7,943,700	[1]
Aggregates
Segment Reporting Information [Line Items]
Net sales	552,500	[2]	464,000	[2]	913,400	[2]	789,400	[2]
Gross profit	161,700		127,100		200,200		151,900
Depreciation, depletion, accretion and amortization	56,300		56,600		111,000		112,500
Aggregates | Identifiable assets
Segment Reporting Information [Line Items]
Total assets	7,126,400	[1]	6,851,900	[1]	7,126,400	[1]	6,851,900	[1]
Aggregates | Segments revenues
Segment Reporting Information [Line Items]
Net sales	595,600	[2]	508,400	[2]	999,900	[2]	867,400	[2]
Aggregates | Intersegment sales
Segment Reporting Information [Line Items]
Net sales	(43,100)	[2]	(44,400)	[2]	(86,500)	[2]	(78,000)	[2]
Concrete
Segment Reporting Information [Line Items]
Net sales	93,800	[3]	120,300	[3]	189,800	[3]	220,200	[3]
Gross profit	3,200	[3]	(5,800)	[3]	(6,000)	[3]	(15,900)	[3]
Depreciation, depletion, accretion and amortization	4,800	[3]	8,200	[3]	10,800	[3]	16,200	[3]
Concrete | Identifiable assets
Segment Reporting Information [Line Items]
Total assets	238,700	[1],[3]	390,300	[1],[3]	238,700	[1],[3]	390,300	[1],[3]
Concrete | Segments revenues
Segment Reporting Information [Line Items]
Net sales	93,800	[3]	120,300	[3]	189,800	[3]	220,200	[3]
Asphalt Mix
Segment Reporting Information [Line Items]
Net sales	107,800		99,900		190,800		167,200
Gross profit	9,000		9,200		13,700		11,200
Depreciation, depletion, accretion and amortization	2,400		2,100		4,800		4,200
Asphalt Mix | Identifiable assets
Segment Reporting Information [Line Items]
Total assets	224,900	[1]	293,300	[1]	224,900	[1]	293,300	[1]
Asphalt Mix | Segments revenues
Segment Reporting Information [Line Items]
Net sales	107,800		99,900		190,800		167,200
Cement
Segment Reporting Information [Line Items]
Net sales	2,200	[4]	11,900	[4]	10,800	[4]	23,800	[4]
Gross profit	900	[4]	2,400	[4]	1,000	[4]	3,400	[4]
Depreciation, depletion, accretion and amortization	200	[4]	4,400	[4]	1,200	[4]	8,300	[4]
Cement | Identifiable assets
Segment Reporting Information [Line Items]
Total assets	6,000	[1],[4]	408,200	[1],[4]	6,000	[1],[4]	408,200	[1],[4]
Cement | Segments revenues
Segment Reporting Information [Line Items]
Net sales	2,200	[4]	23,800	[4]	20,000	[4]	46,500	[4]
Cement | Intersegment sales
Segment Reporting Information [Line Items]
Net sales	0	[4]	(11,900)	[4]	(9,200)	[4]	(22,700)	[4]
Other unallocated
Segment Reporting Information [Line Items]
Depreciation, depletion, accretion and amortization	4,600		5,700		9,900		11,400
Corporate
Segment Reporting Information [Line Items]
Total assets	$ 110,200		$ 89,500		$ 110,200		$ 89,500

[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 transportation and service revenues associated with the aggregates business.

[3] Includes ready-mixed concrete, concrete block, precast concrete, as well as building materials purchased for resale. On March 7, 2014, we sold our concrete business in the Florida area (see Note 16).

[4] Includes cement and calcium products. On March 7, 2014, we sold our cement business (see Note 16).