Significant Accounting Policies - Additional Information (Detail)	3 Months Ended		9 Months Ended
	Sep. 30, 2017 USD ($) State	Sep. 30, 2016 USD ($)	Sep. 30, 2017 USD ($) Facility State Segment	Sep. 30, 2016 USD ($)
Significant Accounting Policies [Line Items]
Number of states with aggregates business sales by destination | State	26		26
Number of reportable segments | Segment			3
Shares withheld for income tax obligations reclassified from operating activity to financing activity			$ 10,213,000	$ 7,133,000
ASU 2016-09
Significant Accounting Policies [Line Items]
Shares withheld for income tax obligations reclassified from operating activity to financing activity				2,635,000
Excess tax benefits from stock-based compensation recognized as operating activities	$ 854,000		$ 6,113,000	5,010,000
ASU 2017-07 | Cost of Sales
Significant Accounting Policies [Line Items]
Reclassification of costs to nonoperating expense		$ 739,000		2,084,000
ASU 2017-07 | Selling, General and Administrative Expenses
Significant Accounting Policies [Line Items]
Reclassification of costs to nonoperating expense		$ 1,575,000		4,815,000
ASU 2017-07 | Other Operating Income and Expenses
Significant Accounting Policies [Line Items]
Reclassification of costs to nonoperating expense				$ 774,000
Minimum
Significant Accounting Policies [Line Items]
Number of quarries distribution facilities and plants | Facility			270