INCOME TAXES (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
INCOME TAXES
Statutory federal tax rate (as a percent)			35.00%
State tax, low end of range of rate (as a percent)			6.00%
State tax, high end of range of rate (as a percent)			6.50%
Effective tax rate (as a percent)	39.70%	33.40%	37.90%	1.80%
Tax benefit from reversal of valuation allowance on foreign tax credit carryovers (as a percent)			1.40%
Alternative fuel tax credit (as a percent)				30.70%
Refund of federal and state income taxes that were paid in prior years, primarily from loss carrybacks			$ 2.0
Federal, state, and foreign income taxes paid			$ 15.8