Investments (Details 1) (USD $) In Thousands, unless otherwise specified	Dec. 29, 2012	Mar. 31, 2012
Investment Securities in a Continuous Unrealized Loss Position
Less than 12 Months, Fair Value	$ 4,086	$ 4,336
Less than 12 Months, Unrealized Losses	(142)	(133)
12 Months or Longer, Fair Value	424
12 Months or Longer, Unrealized Losses	(66)
Total Fair Value	4,510	4,336
Total Unrealized Losses	(208)	(133)
U.S. Treasury and Government Agencies [Member]
Investment Securities in a Continuous Unrealized Loss Position
Less than 12 Months, Fair Value	796	249
Less than 12 Months, Unrealized Losses	(4)	(1)
12 Months or Longer, Fair Value
12 Months or Longer, Unrealized Losses
Total Fair Value	796	249
Total Unrealized Losses	(4)	(1)
Mortgage-backed securities [Member]
Investment Securities in a Continuous Unrealized Loss Position
Less than 12 Months, Fair Value	2,429	2,509
Less than 12 Months, Unrealized Losses	(107)	(48)
12 Months or Longer, Fair Value
12 Months or Longer, Unrealized Losses
Total Fair Value	2,429	2,509
Total Unrealized Losses	(107)	(48)
States and political subdivisions [Member]
Investment Securities in a Continuous Unrealized Loss Position
Less than 12 Months, Fair Value	256
Less than 12 Months, Unrealized Losses	(1)
12 Months or Longer, Fair Value
12 Months or Longer, Unrealized Losses
Total Fair Value	256
Total Unrealized Losses	(1)
Corporate debt securities [Member]
Investment Securities in a Continuous Unrealized Loss Position
Less than 12 Months, Fair Value		384
Less than 12 Months, Unrealized Losses		(1)
12 Months or Longer, Fair Value
12 Months or Longer, Unrealized Losses
Total Fair Value		384
Total Unrealized Losses		(1)
Marketable equity securities [Member]
Investment Securities in a Continuous Unrealized Loss Position
Less than 12 Months, Fair Value	605	1,194
Less than 12 Months, Unrealized Losses	(30)	(83)
12 Months or Longer, Fair Value	424
12 Months or Longer, Unrealized Losses	(66)
Total Fair Value	1,029	1,194
Total Unrealized Losses	$ (96)	$ (83)