Inventories (Tables)

9 Months Ended

Sep. 28, 2014

Inventory Disclosure [Abstract]

Schedule of Inventory, Current [Table Text Block]

Inventories

(Dollars in thousands)
	September 28, 2014		December 29, 2013
Raw materials	$	17,334	$	15,631
Work in process	34,533		27,835
Finished goods	25,807		23,727
Inventories	$	77,674	$	67,193