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Fair Value Measurements - Investments (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Jan. 02, 2016
Mar. 29, 2014
Mar. 28, 2015
Schedule of Available-for-sale Securities      
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Amortized Cost Basis $ 31,800    
Available for sale Securities Current      
Schedule of Available-for-sale Securities      
Cost 31,839   $ 24,912
Unrealized Gain 3 $ 127  
Unrealized Loss (5) 0  
Available-for-sale Securities 31,837   25,039
Available for sale Securities Current | Commercial Paper      
Schedule of Available-for-sale Securities      
Cost 8,948   15,537
Unrealized Gain 0 0  
Unrealized Loss 0 0  
Available-for-sale Securities 8,948   15,537
Available for sale Securities Current | Government agencies      
Schedule of Available-for-sale Securities      
Cost 20,437   2,702
Unrealized Gain 3 0  
Unrealized Loss 0 0  
Available-for-sale Securities 20,440   2,702
Available for sale Securities Current | Corporate Bonds      
Schedule of Available-for-sale Securities      
Cost     853
Unrealized Gain   0  
Unrealized Loss   0  
Available-for-sale Securities     853
Available for sale Securities Current | Exchange Traded Funds [Member]      
Schedule of Available-for-sale Securities      
Cost 2,454   1,950 [1]
Unrealized Gain 0 125 [1]  
Unrealized Loss (5) 0 [1]  
Available-for-sale Securities $ 2,449   2,075 [1]
Available for sale Securities Current | Municipal Bonds      
Schedule of Available-for-sale Securities      
Cost     3,870
Unrealized Gain   2  
Unrealized Loss   $ 0  
Available-for-sale Securities     $ 3,872
[1] *These investments represent assets held in trust for our deferred compensation plan