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Investments (Details) (USD $)
In Thousands, unless otherwise specified
Jun. 29, 2013
Mar. 30, 2013
Available-for-Sale Securities by Investment Category    
Fair Value - Equity Method Investments $ 1,000  
Total Amortized Cost - Available-for-sale Securities 17,240 17,159
Gross Unrealized Gains 703 721
Gross Unrealized Losses (381) (182)
Total Fair Value - Available-for-sale Debt Securities 10,913 12,375
Total Fair Value - Available-for-sale Securities 17,562 17,698
U.S. Treasury and Government Agencies [Member]
   
Available-for-Sale Securities by Investment Category    
Amortized Cost - Available-for sale Debt Securities 2,338 2,682
Gross Unrealized Gains 8 11
Gross Unrealized Losses (59) (6)
Total Fair Value - Available-for-sale Debt Securities 2,287 2,687
Mortgage-backed securities [Member]
   
Available-for-Sale Securities by Investment Category    
Amortized Cost - Available-for sale Debt Securities 4,566 5,226
Gross Unrealized Gains 13 21
Gross Unrealized Losses (231) (108)
Total Fair Value - Available-for-sale Debt Securities 4,348 5,139
States and political subdivisions [Member]
   
Available-for-Sale Securities by Investment Category    
Amortized Cost - Available-for sale Debt Securities 1,673 1,681
Gross Unrealized Gains 14 32
Gross Unrealized Losses (14) 0
Total Fair Value - Available-for-sale Debt Securities 1,673 1,713
Corporate debt securities [Member]
   
Available-for-Sale Securities by Investment Category    
Amortized Cost - Available-for sale Debt Securities 2,569 2,788
Gross Unrealized Gains 36 48
Gross Unrealized Losses 0 0
Total Fair Value - Available-for-sale Debt Securities 2,605 2,836
Marketable equity securities [Member]
   
Available-for-Sale Securities by Investment Category    
Amortized Cost - Available-for-sale Equity Securities 5,094 4,782
Gross Unrealized Gains 632 609
Gross Unrealized Losses (77) (68)
Total Fair Value - Available-for-sale Equity Securities 5,649 5,323
Corporate Joint Venture [Member]
   
Available-for-Sale Securities by Investment Category    
Equity Method Investments $ 1,000