Fair Value of Financial Instruments (Details 1) (USD $) In Thousands, unless otherwise specified	Dec. 28, 2013
Summary of maturities of marketable securities
Due in less than one year, adjusted cost	$ 16,352
Due after one year but within five years, adjusted cost	9,753
Due after five years but within ten years, adjusted cost	2,336
Due after ten years, adjusted cost	4,562
Equity securities, adjusted cost	2,049
Mutual Funds, adjusted cost	3,865
Total, Adjusted Cost	38,917
Due in less than one year, fair value	16,336
Due after one year but within five years, fair value	9,625
Due after five years but within ten years, fair value	2,345
Due after ten years, fair value	4,418
Equity securities, fair value	2,122
Mutual Funds, fair value	3,883
Asset measured at, fair value	$ 38,729