Defined Benefit Plans (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 28, 2012	Sep. 30, 2011	Sep. 28, 2012	Sep. 30, 2011
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Defined Benefit Plan, Service Cost	$ 272	$ 290	$ 835	$ 714
Defined Benefit Plan, Interest Cost	98	124	305	313
Defined Benefit Plan, Amortization of (Gains) Losses	30	21	92	16
Defined Benefit Plan, Expected Return on Plan Assets	(103)	(126)	(318)	(317)
Defined Benefit Plan, Net Periodic Benefit Cost	$ 297	$ 309	$ 914	$ 726