Goodwill and Other Intangible Assets - Changes in Goodwill by Segment (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2019 USD ($)
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 1,309,167	[1]
Foreign currency translation	1,961
Other	(490)
Goodwill, ending balance	1,310,638
Consumer Packaging
Goodwill [Roll Forward]
Goodwill, beginning balance	617,332
Foreign currency translation	1,590
Other	(2,461)
Goodwill, ending balance	616,461
Display and Packaging
Goodwill [Roll Forward]
Goodwill, beginning balance	203,414
Foreign currency translation	0
Other	0
Goodwill, ending balance	203,414
Paper and Industrial Converted Products
Goodwill [Roll Forward]
Goodwill, beginning balance	256,947
Foreign currency translation	377
Other	1,971
Goodwill, ending balance	259,295
Protective Solutions
Goodwill [Roll Forward]
Goodwill, beginning balance	231,474
Foreign currency translation	(6)
Other	0
Goodwill, ending balance	$ 231,468

[1] The year-end condensed consolidated balance sheet data was derived from audited financial statements, but does not include all disclosures required by accounting principles generally accepted in the United States of America.