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Performance-Contingent Restricted Stock Awards (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 30, 2017
Dec. 31, 2016
Jan. 02, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Dividends at vesting $ 553 $ 583 $ 879
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 2016 | 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  
Fiscal Year Vested 2015 | 2013 Award Granted      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Dividends at vesting     859
Tax windfall/(shortfall)     1,430
Fair value at vesting     $ 18,378
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 2016 | 2014 Award Granted      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares increase/(decrease)   (248,872)  
TSR Modifier | Fiscal Year Vested 2015 | 2013 Award Granted      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares increase/(decrease)     (48,069)
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 2016 | 2014 Award Granted      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares increase/(decrease)   (13,637)  
ROIC Modifier | Fiscal Year Vested 2015 | 2013 Award Granted      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares increase/(decrease)     100,090