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Shareholders' Equity Stock Based Compensation Expense (Details) - USD ($)
$ in Thousands
12 Months Ended
Jan. 02, 2016
Jan. 03, 2015
Dec. 28, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based compensation expense $ 10,290 $ 6,798 [1] $ 4,232
Income tax benefit 3,413 2,284 1,447
Total stock-based compensation expense, net of tax 6,877 4,514 2,785
Share-based Compensation, Impact of Change in Forfeiture Rate   (1,200)  
Employee Stock Option [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based compensation expense 2,634 2,125 2,698
Time-based, Performance-based and Market-based Stock Awards [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based compensation expense $ 7,656 $ 4,673 $ 1,534
[1] Reflects a $1.2 million benefit in 2014 related to a change in estimated forfeitures due to employee turnover.