Derivative Financial Instruments Schedule of Offsetting of Derivate Liabilities (Details) (USD $) In Thousands, unless otherwise specified	Jun. 29, 2014	Dec. 31, 2013
Offsetting Liabilities [Line Items]
Derivative Liabilities, Fair Value	$ 1,142	$ 381
Derivative Liability, Fair Value, Amount Offset Against Collateral	0	0
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	1,142	381
Derivative Liability, Fair Value, Gross Asset	(284)	(287)
Derivative, Collateral, Right to Reclaim Cash	0	0
Derivative Liability	858	94
Barclays [Member]
Offsetting Liabilities [Line Items]
Derivative Liabilities, Fair Value	435	287
Derivative Liability, Fair Value, Amount Offset Against Collateral	0	0
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	435	287
Derivative Liability, Fair Value, Gross Asset	0	(287)
Derivative, Collateral, Right to Reclaim Cash	0	0
Derivative Liability	435	0
Wells Fargo Bank [Member]
Offsetting Liabilities [Line Items]
Derivative Liabilities, Fair Value	707	94
Derivative Liability, Fair Value, Amount Offset Against Collateral	0	0
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	707	94
Derivative Liability, Fair Value, Gross Asset	(284)	0
Derivative, Collateral, Right to Reclaim Cash	0	0
Derivative Liability	$ 423	$ 0