Net Sales By Product Line (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Business Combination, Separately Recognized Transactions
Net Sales	$ 379,678	$ 344,059
Gross profit (loss)	25,835	12,821
Aggregates
Business Combination, Separately Recognized Transactions
Net Sales	263,885	247,791
Gross profit (loss)	10,051	2,061
Asphalt
Business Combination, Separately Recognized Transactions
Net Sales	10,498	9,633
Gross profit (loss)	(1,426)	(2,455)
Ready Mixed Concrete
Business Combination, Separately Recognized Transactions
Net Sales	38,009	26,277
Gross profit (loss)	2,944	(81)
Road Paving
Business Combination, Separately Recognized Transactions
Net Sales	9,938	5,189
Gross profit (loss)	(3,982)	(4,287)
Total Aggregates Business
Business Combination, Separately Recognized Transactions
Net Sales	322,330	288,890
Gross profit (loss)	7,587	(4,762)
Specialty Products
Business Combination, Separately Recognized Transactions
Net Sales	57,348	55,169
Gross profit (loss)	18,755	19,582
Corporate
Business Combination, Separately Recognized Transactions
Gross profit (loss)	$ (507)	$ (1,999)