Derivative Financial Instruments Scheduel of Offsetting of Derivative Assets (Details) (USD $) In Thousands, unless otherwise specified	Sep. 28, 2014	Dec. 31, 2013
Offsetting of Derivative Assets [Line Items]
Gross Amounts of Recognized Assets	$ 2,994	$ 905
Gross Amounts Offset in the balance sheet	0	0
Net Amounts of Assets Presented in the Balance Sheet	2,994	905
Financial Instruments	(549)	(287)
Cash Collateral Pledged	0	0
Net Amounts	2,445	618
Barclays [Member]
Offsetting of Derivative Assets [Line Items]
Gross Amounts of Recognized Assets	1,484	905
Gross Amounts Offset in the balance sheet	0	0
Net Amounts of Assets Presented in the Balance Sheet	1,484	905
Financial Instruments	(156)	(287)
Cash Collateral Pledged	0	0
Net Amounts	1,328	618
J.P. Morgan Chase [Member]
Offsetting of Derivative Assets [Line Items]
Gross Amounts of Recognized Assets	318
Gross Amounts Offset in the balance sheet	0
Net Amounts of Assets Presented in the Balance Sheet	318
Financial Instruments	0
Cash Collateral Pledged	0
Net Amounts	318
Wells Fargo Bank [Member]
Offsetting of Derivative Assets [Line Items]
Gross Amounts of Recognized Assets	1,192	0
Gross Amounts Offset in the balance sheet	0	0
Net Amounts of Assets Presented in the Balance Sheet	1,192	0
Financial Instruments	(393)	0
Cash Collateral Pledged	0	0
Net Amounts	$ 799	$ 0