Pension Plans (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Apr. 04, 2014		Mar. 29, 2013
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	$ 116		$ 124
Interest cost	35		27
Expected return on plan assets	(27)		(23)
Net amortization of transitional obligation (a)	0	[1]	3	[1]
Amortization of prior service cost (a)	0	[1]	0	[1]
Actuarial loss, recognized in current period (a)	6	[1]	5	[1]
Net periodic pension cost	$ 130		$ 136

[1] Amounts reclassified from accumulated other comprehensive income.