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Segment Information - Major Customers (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revenue, Major Customer [Line Items]
Net sales	$ 4,583,660	$ 4,504,571	$ 4,514,810
Three Largest Customers | Revenue Benchmark | Customer Concentration Risk
Revenue, Major Customer [Line Items]
Revenue concentration percentage	47.00%
Wal Mart
Revenue, Major Customer [Line Items]
Net sales	$ 1,070,000	1,010,000	1,070,000
Target
Revenue, Major Customer [Line Items]
Net sales	620,000	$ 440,000	$ 450,000
Amazon
Revenue, Major Customer [Line Items]
Net sales	$ 470,000
Two Largest Customers | Revenue Benchmark | Customer Concentration Risk
Revenue, Major Customer [Line Items]
Revenue concentration percentage		32.00%	34.00%

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