Inventories (Tables)

3 Months Ended

Mar. 28, 2015

Inventory Disclosure [Abstract]

Schedule of Inventory, Current [Table Text Block]

Inventories are summarized as follows:

	March 28, 2015			December 27, 2014
Raw materials	$	40,946		$	40,649
Work-in-process	20,953			19,976
Finished goods	60,138			57,913
Supplies and other	177			126
LIFO reserve	(11,960		)	(14,457		)
Inventories	$	110,254		$	104,207