Acquisitions - Summary of Initial Fair Value of Assets Acquired and Liabilities Assumed at Acquisition Date (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Oct. 31, 2014
Business Acquisition Actual Revenue And Pre Tax Income Loss [Line Items]
Goodwill	$ 1,140,461	$ 1,177,962
Weidenhammer Packaging Group
Business Acquisition Actual Revenue And Pre Tax Income Loss [Line Items]
Trade accounts receivable			$ 32,935
Other receivables			2,215
Inventories			34,132
Prepaid expenses			1,657
Property, plant and equipment			161,149
Goodwill			109,727
Other intangible assets			71,682
Other assets			3,820
Payables to suppliers			(12,631)
Accrued expenses and other			(23,110)
Total debt			(27,904)
Pension and other postretirement benefits			(2,969)
Deferred income taxes, net			(26,561)
Noncontrolling interests			(974)
Total net assets			$ 323,168