Other (Income) Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 27, 2015	Jun. 28, 2014	Jun. 27, 2015	Jun. 28, 2014
Other operating (income) expense, net:
Gain on property, plant and equipment disposals	$ (103)	$ (3)	$ (108)	$ (3)
Loss on currency exchanges	102	106	445	226
Amortization of intangibles	76	106	153	150
Retirement expenses	58	15	90	46
Miscellaneous (income) expense	(70)	(5)	(27)	(48)
Other operating (income) expense, net	$ 63	$ 219	$ 553	$ 371