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Segment Information - Net Sales to Three Largest Customers (Detail) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Revenue, Major Customer [Line Items]                      
Net sales $ 1,610,873 $ 1,560,983 $ 974,477 $ 735,618 $ 1,834,400 $ 1,795,575 $ 957,276 $ 869,399 $ 4,881,951 $ 5,456,650 $ 5,702,613
Wal-Mart                      
Revenue, Major Customer [Line Items]                      
Net sales                 1,000,000 1,100,000 1,000,000
Toys R Us                      
Revenue, Major Customer [Line Items]                      
Net sales                 400,000 600,000 600,000
Target                      
Revenue, Major Customer [Line Items]                      
Net sales                 $ 400,000 $ 400,000 $ 500,000