IMPAIRMENT LOSSES AND RESTRUCTURING CHARGES (Textuals) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended							3 Months Ended	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013 Domestic [Member]	Dec. 31, 2013 Laramie, Wyoming [Member]	Dec. 31, 2013 Enid, Oklahoma [Member]	Dec. 31, 2013 Grand Junction [Member]	Dec. 31, 2012 Operating Segments [Member] Domestic [Member] facility	Dec. 31, 2013 Property, Plant and Equipment, Other Types [Member] Domestic [Member]	Dec. 31, 2012 Property, Plant and Equipment, Other Types [Member] Domestic [Member]
Restructuring Cost and Reserve [Line Items]
Impairment of long-lived assets	$ 531	$ 3,086						$ 531	$ 3,086
Number of facilities impaired							2
Number of facilities, secured with new business							1
Loss on disposal of IT assets	966
Accelerated depreciation on IT assets	637
Depreciation expense on reclassified assets				151	271
Accrual adjustment of restructuring reserve				20		138
Facility related costs paid			$ 9,870