Investments (Details 3) (USD $) In Thousands, unless otherwise specified	Dec. 28, 2013	Mar. 30, 2013
Contractual Maturity of Investment Securities
Due in less than one year, Amortized Cost	$ 1,760	$ 1,600
Due after one year through five years, Amortized Cost	3,432	4,786
Due after five years through ten years, Amortized Cost	1,009	924
Due after ten years, Amortized Cost	7,834	5,067
Total Amortized Cost	14,035	12,377
Due in less than one year, Fair Value	1,767	1,607
Due after one year through five years, Fair Value	3,474	4,880
Due after five years through ten years, Fair Value	940	893
Due after ten years, Fair Value	7,556	4,995
Total Fair Value - Available-for-sale Debt Securities	$ 13,737	$ 12,375