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Vesting Time-Based Restricted Stock Units (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jul. 11, 2020
Jul. 13, 2019
Jul. 11, 2020
Jul. 13, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Dividends at Vesting $ 22 $ 128 $ 109 $ 1,361
Time-Based Restricted Stock Units | Fiscal Year Vested 2020        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Dividends at Vesting     55  
Income tax expense related to share-based payments     57  
Fair Value at Vesting     $ 1,584