Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Mar. 30, 2012	Dec. 31, 2011
Current assets
Cash and cash equivalents	$ 15,146	$ 12,255
Accounts receivable	139,372	117,761
Other receivables	2,129	4,602
Inventories	188,972	187,176
Prepaid expenses	40,644	39,739
Deferred income taxes	9,362	9,368
Total current assets	395,625	370,901
Related-party notes receivable	51	73
Long-term deferred income taxes	12,857	11,627
Property, plant and equipment - cost	761,471	753,326
Less allowances for depreciation, depletion and amortization	(499,206)	(489,513)
Property, plant and equipment - net	262,265	263,813
Intangible assets	32,923	34,580
Other assets	7,948	7,073
Goodwill	84,641	84,036
Total assets	796,310	772,103
Current liabilities
Short-term debt	58,055	40,944
Accounts payable	30,380	39,385
Other liabilities and accrued items	45,827	56,309
Unearned revenue	2,252	3,033
Income taxes	2,117
Total current liabilities	138,631	139,671
Other long-term liabilities	15,999	16,488
Retirement and post-employment benefits	103,505	105,115
Unearned income	63,104	62,540
Long-term income taxes	1,793	1,793
Deferred income taxes	855	51
Long-term debt	60,320	40,463
Shareholders' equity	412,103	405,982
Total liabilities and shareholders' equity	$ 796,310	$ 772,103