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Note L - Fair Value Option Valuation Assumptions (Details) - $ / shares
12 Months Ended
Mar. 27, 2016
Mar. 29, 2015
Mar. 30, 2014
Weighted-average option fair values (in dollars per share) $ 11.97
Expected life (years)   4 years 182 days  
Interest rate   1.66%  
Volatility   22.77%  
Dividend Yield   0.00%