Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 27, 2013	Dec. 31, 2012
Current assets
Cash and cash equivalents	$ 20,157	$ 16,056
Accounts receivable	121,987	126,482
Other receivables	384	405
Inventories	212,784	206,125
Prepaid expenses	36,995	41,685
Deferred income taxes	9,195	10,236
Total current assets	401,502	400,989
Related-party notes receivable	11	51
Long-term deferred income taxes	20,749	19,946
Property, plant and equipment—cost	779,870	779,785
Less allowances for depreciation, depletion and amortization	(514,562)	(507,243)
Property, plant and equipment—net	265,308	272,542
Intangible assets	25,908	28,869
Other assets	3,767	3,767
Goodwill	88,753	88,753
Total assets	805,998	814,917
Current liabilities
Short-term debt	36,013	49,432
Accounts payable	30,972	42,281
Other liabilities and accrued items	50,778	55,811
Unearned revenue	461	1,543
Total current liabilities	118,224	149,067
Other long-term liabilities	16,515	16,173
Retirement and post-employment benefits	122,000	125,978
Unearned income	57,664	61,184
Long-term income taxes	1,510	1,510
Deferred income taxes	384	1,130
Long-term debt	52,423	44,880
Shareholders’ equity	437,278	414,995
Total liabilities and shareholders’ equity	$ 805,998	$ 814,917