Inventories (Tables)

3 Months Ended

Mar. 31, 2013

Inventories [Abstract]

Schedule of Inventory, Current [Table Text Block]

Inventories

(Dollars in thousands)
	March 31, 2013		December 30, 2012
Raw materials	$	21,552	$	18,325
Work in process	33,399		31,525
Finished goods	23,151		22,098
Inventories	$	78,102	$	71,948