DISCONTINUED OPERATIONS (Details) - Pueblo Colorado gravel operations		3 Months Ended
	Sep. 30, 2016 USD ($) claim	Oct. 01, 2016 USD ($)	Sep. 27, 2014 USD ($) 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
Reserve on overpaid royalties		0
Number of counterclaims | claim	3
Minimum
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Royalty overpayments		$ 650,000
Amount of possible exposure to the entity	$ 5,900,000