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Fair Value of Financial Instruments - Auction Rate Securities (Details) - Significant Unobservable Inputs (Level 3) - USD ($)
$ in Thousands
12 Months Ended
Jan. 02, 2016
Jan. 03, 2015
Dec. 28, 2013
Assets and liabilities measured at fair value on recurring basis      
Quantitative information for Level 3 Fair Value Measurements Assets      
Fair value balance at the end of the period $ 7,126    
Auction rate securities | Weighted Average | Discounted cash flow      
Quantitative information for Level 3 Fair Value Measurements Assets      
Estimated yield (as a percent) 1.06%    
Expected holding period 10 years    
Estimated discount rate (as a percent) 3.69%    
Auction rate securities | Assets and liabilities measured at fair value on recurring basis      
Quantitative information for Level 3 Fair Value Measurements Assets      
Fair value balance at the end of the period $ 7,126 $ 7,419 $ 10,632