Derivative Financial Instruments Scheduel of Offsetting of Derivative Assets (Details) - USD ($) $ in Thousands	Jul. 03, 2016	Dec. 31, 2015
Offsetting of Derivative Assets [Line Items]
Gross Amounts of Recognized Assets	$ 1,481	$ 3,205
Gross Amounts Offset in the balance sheet	0	0
Net Amounts of Assets Presented in the Balance Sheet	1,481	3,205
Financial Instruments	(384)	(451)
Cash Collateral Pledged	0	0
Net Amounts	1,097	2,754
Barclays [Member]
Offsetting of Derivative Assets [Line Items]
Gross Amounts of Recognized Assets	38	577
Gross Amounts Offset in the balance sheet	0	0
Net Amounts of Assets Presented in the Balance Sheet	38	577
Financial Instruments	(38)	(56)
Cash Collateral Pledged	0	0
Net Amounts	0	521
Wells Fargo Bank [Member]
Offsetting of Derivative Assets [Line Items]
Gross Amounts of Recognized Assets	1,443	2,628
Gross Amounts Offset in the balance sheet	0	0
Net Amounts of Assets Presented in the Balance Sheet	1,443	2,628
Financial Instruments	(346)	(395)
Cash Collateral Pledged	0	0
Net Amounts	$ 1,097	$ 2,233