Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 29, 2013	Dec. 31, 2012
Current assets
Cash and cash equivalents	$ 20,242	$ 16,056
Accounts receivable	129,812	126,482
Other receivables	91	405
Inventories	201,328	206,125
Prepaid expenses	39,240	41,685
Deferred income taxes	8,280	10,236
Total current assets	398,993	400,989
Related-party notes receivable	51	51
Long-term deferred income taxes	20,482	19,946
Property, plant and equipment-cost	787,354	779,785
Less allowances for depreciation, depletion and amortization	(514,321)	(507,243)
Property, plant and equipment-net	273,033	272,542
Intangible assets	27,406	28,869
Other assets	3,682	3,767
Goodwill	88,753	88,753
Total assets	812,400	814,917
Current liabilities
Short-term debt	48,665	49,432
Accounts payable	25,985	42,281
Other liabilities and accrued items	45,876	55,811
Unearned revenue	1,575	1,543
Income taxes	194	0
Total current liabilities	122,295	149,067
Other long-term liabilities	16,428	16,173
Retirement and post-employment benefits	125,514	125,978
Unearned income	60,011	61,184
Long-term income taxes	1,510	1,510
Deferred income taxes	804	1,130
Long-term debt	64,730	44,880
Shareholders' equity	421,108	414,995
Total liabilities and shareholders' equity	$ 812,400	$ 814,917