XML 64 R51.htm IDEA: XBRL DOCUMENT v2.4.0.8
Investments (Details Textual) (USD $)
3 Months Ended 6 Months Ended
Sep. 28, 2013
Sep. 28, 2013
Sep. 28, 2013
Common stock of industrial and other companies [Member]
Mar. 30, 2013
Common stock of industrial and other companies [Member]
Sep. 28, 2013
Common stock of bank trust, insurance, and public utility companies [Member]
Mar. 30, 2013
Common stock of bank trust, insurance, and public utility companies [Member]
Schedule of Available-for-sale Securities [Line Items]            
Fair Value     $ 2,800,000 $ 3,700,000 $ 1,400,000 $ 1,600,000
Total unrealized losses     13,000 51,000 14,000 (17,000)
Investments (Textual) [Abstract]            
Value of investments to be other-than-temporarily impaired   0        
Gross gains realized 396,000 464,000        
Gross losses realized $ (48,000) $ (84,000)