Significant Accounting Policies - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2012 State
Significant Accounting Policies [Line Items]
Number of quarries distribution facilities and plants	297
Number of states with aggregates business sales by destination	33
Aggregates Product Line
Significant Accounting Policies [Line Items]
Total net sales, Percentage	71.00%
Vertically Integrated
Significant Accounting Policies [Line Items]
Total net sales, Percentage	18.00%
Specialty Products
Significant Accounting Policies [Line Items]
Total net sales, Percentage	11.00%