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OUT-OF-PERIOD ADJUSTMENT (Notes)	6 Months Ended
OUT-OF-PERIOD ADJUSTMENT (Notes)	Jun. 30, 2013
Out-of-Period Adjustment [Abstract]
OUT-OF-PERIOD ADJUSTMENT	OUT-OF-PERIOD ADJUSTMENT We recorded the net effect of an out-of-period adjustment which increased our insurance policy benefits by $6.7 million, increased amortization expense by $2.5 million, decreased tax expense by $3.2 million and decreased our net income by $6.0 million (or 3 cents per diluted share) in the six months ended June 30, 2013 (none of which was recognized in the second quarter of 2013). We evaluated this error taking into account both qualitative and quantitative factors and considered the impact of this error in relation to the 2013 period, as well as the materiality to the periods in which they originated. The impact of correcting this error in prior years was not significant to any individual period. Management believes this error is immaterial to the consolidated financial statements and all previously issued financial statements.