Cash and Investments Cash and Investments Textual (Details)	9 Months Ended
	Sep. 28, 2013
Cash and Investments Additional Disclosures [Abstract]
Maximum maturity period of Available-for-sale marketable securities, classified as cash equivalents	90 days
Minimum maturity period of Available-for-sale marketable securities, classified as marketable securities	90 days
Maximum period of available for sale securities debt maturities	2 years