ACQUISITIONS AND DIVESTITURES (Details)	3 Months Ended	9 Months Ended		12 Months Ended
	Mar. 31, 2015 USD ($) property	Sep. 30, 2016 USD ($)	Sep. 30, 2015 USD ($)	Dec. 31, 2015 USD ($) property
Significant Acquisitions and Disposals [Line Items]
Cash consideration		$ 1,611,000	$ 20,801,000	$ 27,198,000
Total consideration				47,198,000
Exchanges of real property and businesses				20,000,000
Prepaid expenses		71,370,000	56,017,000	34,284,000
Assets held for sale		0	$ 0	$ 0
Acquisition Closed On October 1, 2016 [Member]
Significant Acquisitions and Disposals [Line Items]
Prepaid expenses		19,500,000
Aggregates [Member] | Tennessee [Member]
Significant Acquisitions and Disposals [Line Items]
Number of facilities acquired | property				1
Aggregates [Member] | Arizona and New Mexico [Member]
Significant Acquisitions and Disposals [Line Items]
Number of facilities acquired | property				3
Concrete [Member] | Arizona and New Mexico [Member]
Significant Acquisitions and Disposals [Line Items]
Number of facilities acquired | property				7
Concrete [Member] | California [Member]
Significant Acquisitions and Disposals [Line Items]
Number of facilities divested | property	12
Gain on sale of properties and businesses	$ 5,886,000
Asphalt Mix [Member] | Arizona [Member]
Significant Acquisitions and Disposals [Line Items]
Number of facilities acquired | property				13
Trucking Business Assets [Member]
Significant Acquisitions and Disposals [Line Items]
Cash consideration		$ 1,611,000