Inventories (Tables)

9 Months Ended

Sep. 25, 2016

Inventory Disclosure [Abstract]

Schedule of Inventory, Current [Table Text Block]

Inventories

(Dollars in thousands)
	September 25, 2016		December 27, 2015
Raw materials	$	35,874	$	19,148
Work in process	21,527		21,063
Finished goods	15,588		21,558
Inventories	$	72,989	$	61,769