Hedging Activities (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 28, 2014	Jun. 29, 2013	Jun. 28, 2014	Jun. 29, 2013	Dec. 28, 2013
Derivatives, Fair Value [Line Items]
Net Unrealized Gain (Loss)	$ (446)	$ (10)	$ (628)	$ 1,585
Fair Value	31,632		31,632		30,608
Short Term Liabilities [Member]
Derivatives, Fair Value [Line Items]
Net Unrealized Gain (Loss)	(223)	(7)	(314)	525
Fair Value	15,816		15,816		15,304
Long Term Liabilities [Member]
Derivatives, Fair Value [Line Items]
Net Unrealized Gain (Loss)	(223)	(3)	(314)	1,060
Fair Value	$ 15,816		$ 15,816		$ 15,304