SEGMENT REPORTING (Segment Financial Disclosure) (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016	Dec. 31, 2015
Segment Reporting Information [Line Items]
Total revenues		$ 787,328	$ 754,728
Gross profit		159,979	164,718
Depreciation, depletion, accretion and amortization		71,563	69,406
Cash and cash equivalents		286,957	191,886	$ 258,986	$ 284,060
Total assets		8,744,324	8,247,025	$ 8,471,475
Operating Segments [Member]
Segment Reporting Information [Line Items]
Total revenues		836,712	796,274
Total assets	[1]	8,309,612	8,046,450
Aggregates [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total revenues	[2]	650,300	634,868
Gross profit		140,162	148,383
Depreciation, depletion, accretion and amortization		57,656	57,511
Total assets	[1]	7,810,486	7,614,796
Aggregates [Member] | Intersegment sales [Member]
Segment Reporting Information [Line Items]
Total revenues		(49,384)	(41,546)
Asphalt Mix [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total revenues		95,776	89,099
Gross profit		8,640	12,214
Depreciation, depletion, accretion and amortization		5,731	4,232
Total assets	[1]	258,982	233,025
Concrete [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total revenues		88,750	70,397
Gross profit		10,454	3,477
Depreciation, depletion, accretion and amortization		3,023	2,981
Total assets	[1]	235,592	193,323
Calcium [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total revenues		1,886	1,910
Gross profit		723	644
Depreciation, depletion, accretion and amortization		195	183
Total assets	[1]	4,552	5,306
Other Segments [Member]
Segment Reporting Information [Line Items]
Depreciation, depletion, accretion and amortization		4,958	4,499
Corporate [Member]
Segment Reporting Information [Line Items]
Total assets		$ 147,755	$ 8,689

[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 other revenues related to services.