Reconciliation of Segment Income from Operations to Income before Income Taxes (Detail) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2017		Sep. 30, 2016	Sep. 30, 2017		Sep. 30, 2016
Segment Reporting [Abstract]
Total segment income from operations	$ 138,566	[1]	$ 122,407	$ 270,560	[1]	$ 247,502
Interest and other debt expense	30,583		17,318	87,259		50,657
Income before income taxes	$ 107,983		$ 105,089	$ 183,301		$ 196,845

[1] Income from operations for Corporate includes costs attributed to announced acquisitions of $0.8 million and $23.8 million for the three and nine months ended September 30, 2017, respectively. Income from operations for Metal Containers includes a $3.0 million charge for the nine months ended September 30, 2017 related to the resolution of a past non-commercial legal dispute.