Business Segments - Additional Information (Detail)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2015 USD ($)	Sep. 30, 2014 USD ($)	Sep. 30, 2015 USD ($) Segment	Sep. 30, 2014 USD ($)	Dec. 31, 2014 USD ($)
Segment Reporting Information [Line Items]
Reportable business segments | Segment			3
Total revenues	$ (1,082,249,000)	$ (1,003,723,000)	$ (2,695,014,000)	$ (2,101,578,000)
Reclassification of goodwill					$ 600,000,000
Cement | Intersegment Eliminations
Segment Reporting Information [Line Items]
Total revenues	25,349,000	22,061,000	64,304,000	22,061,000
Earnings from operations | West Group
Segment Reporting Information [Line Items]
Non recurring earnings		$ 40,756,000		$ 40,756,000
Earnings from operations | Cement
Segment Reporting Information [Line Items]
Loss on sale of operations and other related expenses	$ 28,709,000		$ 29,888,000