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ACQUISITIONS AND DISPOSITIONS - Sale of California Precast Operations (Details) (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Aug. 02, 2012 California Precast Operations	Mar. 31, 2013 Other Receivables
Significant Acquisitions and Disposals [Line Items]
Proceeds from sale			$ 21,300,000
Payments related to disposals of business units	1,866,000	0
Other receivables				$ 600,000

For the disposal group, including a component of the entity (discontinued operation), the aggregate of amounts due from customers or clients for goods or services that have been delivered or sold in the normal course of business and an amount representing an agreement for an unconditional promise by the maker to pay the entity (holder) a definite sum of money at a future date, reduced to their estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection and net of any write-downs taken for collection uncertainty on the part of the holder, respectively.

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