DISCONTINUED OPERATIONS (Details) - Pueblo Colorado gravel operations	Oct. 01, 2016 USD ($)	Sep. 15, 2016 USD ($) T	Sep. 27, 2014 T
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Sand and gravel reserves (in tons) | T		50,000,000
Royalty overpayments		$ 1,282,000
Write off of prepaid royalties	$ 632,000
Sand and gravel tons paid for | T			17,700,000
Minimum
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Quarterly royalty payment		$ 300,000