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Schedule of Effect of Derivative Instruments in Statement of Operations Recognized (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jul. 01, 2018
Jun. 30, 2019
Jul. 01, 2018
Other (income) expense, net        
Derivative Instruments, Gain (Loss) [Line Items]        
Losses (Gains) on derivatives recognized in statements of operations $ 239 $ 1,826 $ 4,173 $ 3,401