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Inventory
9 Months Ended
Sep. 30, 2011
Inventory [Abstract] 
Inventory
4.
During the nine months and the three months ended September 30, 2011, we incurred a $1.0 million temporary LIFO liquidation gain due to reductions in finished cement and work in process inventory which we expect to be restored by the end of the year. The temporary LIFO liquidation gain has been deferred as a component of accrued liabilities. We did not incur any temporary LIFO liquidation gain for the nine months or the three months ended September 30, 2010.