Investment Securities (Narrative) (Details)	9 Months Ended
	Sep. 27, 2014
Schedule of Investments [Line Items]
Contractual maturities of investment securities	3 years
Minimum [Member]
Schedule of Investments [Line Items]
Contractual maturities of investment securities	2 years
Maximum [Member]
Schedule of Investments [Line Items]
Contractual maturities of investment securities	3 years
Contractual maturities of investment securities, balance	1 year