Derivative Financial Instruments Schedule of Offsetting of Derivate Liabilities (Details) (USD $) In Thousands, unless otherwise specified	Sep. 28, 2014	Dec. 31, 2013
Offsetting Liabilities [Line Items]
Gross Amounts of Recognized Liabilities	$ 549	$ 381
Gross Amounts Offset in the Balance Sheet	0	0
Net Amounts of Liabilities Presented in the Balance Sheet	549	381
Financial Instruments	(549)	(287)
Cash Collateral Pledged	0	0
Net Amount	0	94
Barclays [Member]
Offsetting Liabilities [Line Items]
Gross Amounts of Recognized Liabilities	156	287
Gross Amounts Offset in the Balance Sheet	0	0
Net Amounts of Liabilities Presented in the Balance Sheet	156	287
Financial Instruments	(156)	(287)
Cash Collateral Pledged	0	0
Net Amount	0	0
Wells Fargo Bank [Member]
Offsetting Liabilities [Line Items]
Gross Amounts of Recognized Liabilities	393	94
Gross Amounts Offset in the Balance Sheet	0	0
Net Amounts of Liabilities Presented in the Balance Sheet	393	94
Financial Instruments	(393)	0
Cash Collateral Pledged	0	0
Net Amount	$ 0	$ 94

Fair value, after offset of derivative asset, of financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, elected not to be and before offset against a right to receive collateral under a master netting arrangement. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.

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Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset.

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