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Summary of Significant Accounting Policies Summary of Significant Accounting Policies (Allowance for doubtful accounts) (Details) - Allowance for Doubtful Accounts [Member] - USD ($)
$ in Thousands
12 Months Ended
Jan. 02, 2016
Jan. 03, 2015
Dec. 28, 2013
Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at beginning of period $ 5,096 $ 6,208 $ 5,151
Charged to costs and expenses 1,394 343 2,590
Amounts written off, net of recoveries and other adjustments 2,203 1,455 1,533
Balance at end of period $ 4,287 $ 5,096 $ 6,208