Income Taxes Components of Deferred Tax Assets and Liabilities (Details) (USD $) In Thousands, unless otherwise specified	Dec. 28, 2013	Dec. 29, 2012
Deferred tax assets:
Inventories	$ 2,226	$ 2,324
Retirement benefits	3,408	3,464
Federal/State net operating losses	2,936	3,221
Federal/State tax credit carryforwards	1,740	2,111
Allowances for bad debts, claims and discounts	2,527	1,845
Other	5,279	5,497
Total deferred tax assets	18,116	18,462
Valuation allowance	(3,748)	(4,938)
Net deferred tax assets	14,368	13,524
Deferred tax liabilities:
Property, plant and equipment	11,818	11,733
Total deferred tax liabilities	11,818	11,733
Net deferred tax assets	2,550	1,791
Balance sheet classification:
Current deferred tax assets	6,622	5,615
DEFERRED INCOME TAXES	4,072	3,824
Net deferred tax assets	$ 2,550	$ 1,791