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Restructuring Charges and Asset Impairment - Additional Information (Detail) - USD ($)
$ in Thousands
4 Months Ended
Apr. 20, 2019
Apr. 21, 2018
Restructuring Cost And Reserve [Line Items]    
Impairment charges $ 100 $ 1,470
Fair Value Measurements Nonrecurring [Member] | Significant unobservable inputs (Level 3) [Member]    
Restructuring Cost And Reserve [Line Items]    
Long-lived assets 300 1,800
Long-lived assets measured fair value on nonrecurring basis 200 300
Impairment charges $ 100 $ 1,500