Investments (Details 3) - USD ($) $ in Thousands	Sep. 26, 2015	Mar. 28, 2015
Contractual Maturity of Investment Securities
Due in less than one year, Amortized Cost	$ 1,286	$ 1,804
Due after one year through five years, Amortized Cost	3,456	2,834
Due after five years through ten years, Amortized Cost	4,069	2,467
Due after ten years, Amortized Cost	6,795	7,439
Total Amortized Cost	15,606	14,544
Due in less than one year, Fair Value	1,291	1,821
Due after one year through five years, Fair Value	3,467	2,844
Due after five years through ten years, Fair Value	4,037	2,452
Due after ten years, Fair Value	6,952	7,650
Total Fair Value - Available-for-sale Debt Securities	$ 15,747	$ 14,767