Cash, Cash Equivalents and Investments (Details 3) $ in Thousands	Oct. 03, 2015 USD ($)
Contractual maturity of marketable debt investments
Marketable Investments, Debt Maturities, Within One Year, Amortized Cost	$ 47,058
Marketable Investments, Debt Maturities, Year One Through Three, Amortized Cost	46,174
Marketable investments, Debt Maturities, Amortized Cost, Total	93,232
Marketable Investments, Debt Maturities, Within One Year, Fair Value	47,091
Marketable Investments, Debt Maturities, Year One Through Three, Fair Value	46,252
Marketable Investments, Debt Maturities, Fair Value, Total	$ 93,343