LEGAL PROCEEDINGS (Details) - Pueblo Colorado gravel operations		3 Months Ended	9 Months Ended
	Sep. 10, 2014 USD ($) T	Sep. 27, 2014 USD ($) T	Sep. 27, 2014 USD ($) T
Gain Contingencies [Line Items]
Royalty overpayments		$ 1,282,000
Royalties recoverable pending outcome of litigation	$ 1,282,000
Royalties paid in excess	$ 1,470,000	$ 1,470,000	$ 1,470,000
Sand and gravel reserves (in tons) | T	50,000,000	50,000,000
Sand and gravel tons paid for | T		17,700,000	17,700,000
Reserve on overpaid royalties		$ 0	$ 0
Remaining Unmined Sand and Gravel (in tons) | T		32,300,000	32,300,000