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Performance-Contingent Restricted Stock Awards (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 29, 2018
Dec. 30, 2017
Dec. 31, 2016
Jan. 02, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Dividends at vesting $ 498 $ 553 $ 583  
Tax windfall/(shortfall)     $ 675  
Fiscal Year Vested 2018 | 2016 Award Granted        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Dividends at vesting 405      
Tax windfall/(shortfall) (2,130)      
Fair value at vesting $ 6,504      
Fiscal Year Vested 2017 | 2015 Award Granted        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Dividends at vesting   392    
Tax windfall/(shortfall)   (3,103)    
Fair value at vesting   $ 6,316    
Fiscal Year Vested 2015 | 2014 Award Granted        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Dividends at vesting       $ 441
Tax windfall/(shortfall)       (3,090)
Fair value at vesting       $ 7,173
TSR Modifier | Fiscal Year Vested 2018 | 2016 Award Granted        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Shares increase/(decrease) (333,112)      
TSR Modifier | Fiscal Year Vested 2017 | 2015 Award Granted        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Shares increase/(decrease)   (378,219)    
TSR Modifier | Fiscal Year Vested 2015 | 2014 Award Granted        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Shares increase/(decrease)       (248,872)
ROIC Modifier | Fiscal Year Vested 2018 | 2016 Award Granted        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Shares increase/(decrease) (114,190)      
ROIC Modifier | Fiscal Year Vested 2017 | 2015 Award Granted        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Shares increase/(decrease)   (49,272)    
ROIC Modifier | Fiscal Year Vested 2015 | 2014 Award Granted        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Shares increase/(decrease)       (13,637)