Inventories (Tables)

9 Months Ended

Sep. 27, 2015

Inventory Disclosure [Abstract]

Schedule of Inventory, Current [Table Text Block]

Inventories

(Dollars in thousands)
	September 27, 2015		December 28, 2014
Raw materials	$	14,462	$	19,427
Work in process	31,132		30,797
Finished goods	16,228		24,453
Inventories	$	61,822	$	74,677