FAIR VALUE MEASUREMENTS Narrative (Details)	6 Months Ended
Jun. 30, 2012
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Line Items]
Fair Value, Assets Held-for-sale, Long Lived, Valuation Techniques	We estimated the fair value of the long-lived assets associated with our Asphalt Operations reporting unit as the sum of the purchase price to be paid by Lindsay Goldberg for the Class A Interests of Asphalt JV and the fair value of the Class B Interests of Asphalt JV that we would retain. We determined the fair value of the Class B Interests using a combination of valuation methods, including an income approach method, a market approach method and an option model. The significant inputs used in the income approach method include estimated future cash flows and a discount rate equal to the estimated weighted average cost of capital of 14.0%. Inputs used in the market approach method include observable multiples applied to key financial statistics derived from peer companies. Inputs to the option model include an underlying asset value, a five-year expected date of liquidity, a discount rate of 0.7%, an expected volatility of 62.0% and exercise prices consistent with the distribution and liquidation rights for the Class A Interests and Class B Interests. The other long-lived assets held for sale in the table above represent certain corporate assets that we wrote down to their estimated sales price.

FAIR VALUE MEASUREMENTS Narrative (Details)

6 Months Ended

Jun. 30, 2012

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Line Items]

Fair Value, Assets Held-for-sale, Long Lived, Valuation Techniques

We estimated the fair value of the long-lived assets associated with our Asphalt Operations reporting unit as the sum of the purchase price to be paid by Lindsay Goldberg for the Class A Interests of Asphalt JV and the fair value of the Class B Interests of Asphalt JV that we would retain. We determined the fair value of the Class B Interests using a combination of valuation methods, including an income approach method, a market approach method and an option model. The significant inputs used in the income approach method include estimated future cash flows and a discount rate equal to the estimated weighted average cost of capital of 14.0%. Inputs used in the market approach method include observable multiples applied to key financial statistics derived from peer companies. Inputs to the option model include an underlying asset value, a five-year expected date of liquidity, a discount rate of 0.7%, an expected volatility of 62.0% and exercise prices consistent with the distribution and liquidation rights for the Class A Interests and Class B Interests. The other long-lived assets held for sale in the table above represent certain corporate assets that we wrote down to their estimated sales price.