Derivative and Hedgiing Activities Derivatives and Hedging Activities Notional Amounts (Details) - Foreign Exchange Forward [Member] - USD ($) $ in Thousands	Oct. 02, 2015	Dec. 31, 2014
Long [Member] | Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Asset, Notional Amount	$ 14,280	$ 16,903
Long [Member] | Not Designated as Hedging Instrument [Member] | Fair Value Hedging [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Asset, Notional Amount	8,244	1,043
Short [Member] | Not Designated as Hedging Instrument [Member] | Fair Value Hedging [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Liability, Notional Amount	$ 7,827	$ 4,925