LEGAL CONTINGENCIES - Additional Information (Details) - USD ($)	1 Months Ended
	May. 31, 2015	Mar. 31, 2008	Jan. 31, 2015
Loss Contingencies [Line Items]
Payment received from proceeds deposited with bankruptcy court	$ 1,600,000
GPS [Member]
Loss Contingencies [Line Items]
GPS mechanics lien against Nebraska project		$ 23,800,000
Net proceeds held by the bankruptcy court			$ 5,500,000
Payment received from proceeds deposited with bankruptcy court	$ 1,600,000