Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 29, 2020	Mar. 31, 2019
Disaggregation of Revenue [Line Items]
Revenue	$ 1,303,296	$ 1,351,705
United States
Disaggregation of Revenue [Line Items]
Revenue	850,498	851,704
Europe
Disaggregation of Revenue [Line Items]
Revenue	257,494	275,027
Canada
Disaggregation of Revenue [Line Items]
Revenue	51,422	60,134
Asia
Disaggregation of Revenue [Line Items]
Revenue	72,524	85,893
Other
Disaggregation of Revenue [Line Items]
Revenue	71,358	78,947
Consumer Packaging
Disaggregation of Revenue [Line Items]
Revenue	588,417	589,716
Consumer Packaging | United States
Disaggregation of Revenue [Line Items]
Revenue	421,479	416,397
Consumer Packaging | Europe
Disaggregation of Revenue [Line Items]
Revenue	103,023	108,213
Consumer Packaging | Canada
Disaggregation of Revenue [Line Items]
Revenue	25,845	27,301
Consumer Packaging | Asia
Disaggregation of Revenue [Line Items]
Revenue	16,538	15,913
Consumer Packaging | Other
Disaggregation of Revenue [Line Items]
Revenue	21,532	21,892
Display and Packaging
Disaggregation of Revenue [Line Items]
Revenue	121,356	137,554
Display and Packaging | United States
Disaggregation of Revenue [Line Items]
Revenue	55,709	65,563
Display and Packaging | Europe
Disaggregation of Revenue [Line Items]
Revenue	65,647	70,242
Display and Packaging | Canada
Disaggregation of Revenue [Line Items]
Revenue	0	0
Display and Packaging | Asia
Disaggregation of Revenue [Line Items]
Revenue	0	0
Display and Packaging | Other
Disaggregation of Revenue [Line Items]
Revenue	0	1,749
Paper and Industrial Converted Products
Disaggregation of Revenue [Line Items]
Revenue	474,970	496,037
Paper and Industrial Converted Products | United States
Disaggregation of Revenue [Line Items]
Revenue	276,822	268,566
Paper and Industrial Converted Products | Europe
Disaggregation of Revenue [Line Items]
Revenue	83,540	90,705
Paper and Industrial Converted Products | Canada
Disaggregation of Revenue [Line Items]
Revenue	25,577	32,833
Paper and Industrial Converted Products | Asia
Disaggregation of Revenue [Line Items]
Revenue	55,784	69,060
Paper and Industrial Converted Products | Other
Disaggregation of Revenue [Line Items]
Revenue	33,247	34,873
Protective Solutions
Disaggregation of Revenue [Line Items]
Revenue	118,553	128,398
Protective Solutions | United States
Disaggregation of Revenue [Line Items]
Revenue	96,488	101,178
Protective Solutions | Europe
Disaggregation of Revenue [Line Items]
Revenue	5,284	5,867
Protective Solutions | Canada
Disaggregation of Revenue [Line Items]
Revenue	0	0
Protective Solutions | Asia
Disaggregation of Revenue [Line Items]
Revenue	202	920
Protective Solutions | Other
Disaggregation of Revenue [Line Items]
Revenue	$ 16,579	$ 20,433