Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Current assets
Cash and cash equivalents	$ 16,056	$ 12,255
Accounts receivable (net of allowance of $1,403 for 2012 and $1,490 for 2011)	126,482	117,761
Other receivables	405	4,602
Inventories	206,125	187,176
Prepaid expenses	41,685	39,739
Deferred income taxes	10,236	9,368
Total current assets	400,989	370,901
Related-party notes receivable	51	73
Long-term deferred income taxes	19,946	11,627
Property, plant and equipment	779,785	752,726
Less allowances for depreciation, amortization and depletion	(507,243)	(489,328)
Property, plant and equipment - net	272,542	263,398
Intangible assets	28,869	34,995
Other assets	3,767	7,073
Goodwill	88,753	84,036
Total Assets	814,917	772,103
Current liabilities
Short-term debt	49,432	40,944
Accounts payable	42,281	39,385
Salaries and wages	27,768	29,441
Taxes other than income taxes	1,055	975
Other liabilities and accrued items	26,988	25,893
Unearned revenue	1,543	3,033
Total current liabilities	149,067	139,671
Other long-term liabilities	16,173	16,488
Retirement and post-employment benefits	125,978	105,115
Unearned income	61,184	62,540
Long-term income taxes	1,510	1,793
Deferred income taxes	1,130	51
Long-term debt	44,880	40,463
Shareholders' equity
Serial preferred stock (no par value; 5,000 authorized shares, none issued)	0	0
Common stock (no par value; 60,000 authorized shares, issued shares of 27,050 for 2012 and 27,024 for 2011)	191,169	185,913
Retained earnings	428,394	408,380
Common stock in treasury (6,607 shares for 2012 and 6,716 shares for 2011)	(118,298)	(118,279)
Other comprehensive income (loss)	(88,429)	(72,215)
Other equity transactions	2,159	2,183
Total shareholders' equity	414,995	405,982
Total Liabilities and Shareholders' Equity	$ 814,917	$ 772,103