SEGMENT REPORTING (Segment Financial Disclosure) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013		Dec. 31, 2013	Dec. 31, 2012
Segment Reporting Information [Line Items]
Net sales	$ 548,496		$ 504,554
Delivery revenues	25,924		33,608
Total revenues	574,420		538,162
Gross profit	34,092		17,655
Depreciation, depletion, accretion and amortization	69,378		75,597
Cash items	268,773		188,081		193,738	275,478
Total assets	7,872,235		8,078,475		8,259,143
Identifiable assets
Segment Reporting Information [Line Items]
Total assets	7,484,600	[1]	7,798,700	[1]
Aggregates
Segment Reporting Information [Line Items]
Net sales	360,800	[2]	325,400	[2]
Gross profit	38,500		24,800
Depreciation, depletion, accretion and amortization	54,600		55,900
Aggregates | Identifiable assets
Segment Reporting Information [Line Items]
Total assets	7,004,200	[1]	6,737,200	[1]
Aggregates | Segments revenues
Segment Reporting Information [Line Items]
Net sales	404,200	[2]	359,000	[2]
Aggregates | Intersegment sales
Segment Reporting Information [Line Items]
Net sales	(43,400)	[2]	(33,600)	[2]
Concrete
Segment Reporting Information [Line Items]
Net sales	96,000	[3]	99,900	[3]
Gross profit	(9,200)	[3]	(10,000)	[3]
Depreciation, depletion, accretion and amortization	6,000	[3]	8,000	[3]
Concrete | Identifiable assets
Segment Reporting Information [Line Items]
Total assets	240,400	[1],[3]	380,400	[1],[3]
Concrete | Segments revenues
Segment Reporting Information [Line Items]
Net sales	96,000	[3]	99,900	[3]
Asphalt Mix
Segment Reporting Information [Line Items]
Net sales	83,000		67,300
Gross profit	4,700		1,900
Depreciation, depletion, accretion and amortization	2,400		2,000
Asphalt Mix | Identifiable assets
Segment Reporting Information [Line Items]
Total assets	225,400	[1]	268,900	[1]
Asphalt Mix | Segments revenues
Segment Reporting Information [Line Items]
Net sales	83,000		67,300
Cement
Segment Reporting Information [Line Items]
Net sales	8,700	[4]	12,000	[4]
Gross profit	100	[4]	1,000	[4]
Depreciation, depletion, accretion and amortization	1,100	[4]	3,900	[4]
Cement | Identifiable assets
Segment Reporting Information [Line Items]
Total assets	14,600	[1],[4]	412,200	[1],[4]
Cement | Segments revenues
Segment Reporting Information [Line Items]
Net sales	17,900	[4]	22,700	[4]
Cement | Intersegment sales
Segment Reporting Information [Line Items]
Net sales	(9,200)	[4]	(10,700)	[4]
Other unallocated
Segment Reporting Information [Line Items]
Depreciation, depletion, accretion and amortization	5,300		5,800
Corporate
Segment Reporting Information [Line Items]
Total assets	$ 118,800		$ 91,700

[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 in the Florida area (see Note 16).