CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 59,996	$ 63,623
Accounts receivable, less allowances (2013 - $441; 2012 - $469)	63,708	47,486
Inventories	38,576	31,292
Prepaid expenses and other current assets	10,260	9,400
Total current assets	172,540	151,801
Property, plant and equipment, at cost	260,616	249,206
Accumulated depreciation	(183,464)	(172,952)
Net, property, plant and equipment	77,152	76,254
Goodwill	18,491	18,282
Other intangible assets	3,553	3,825
Other assets, net	1,049	1,754
Total assets	272,785	251,916
Current liabilities:
Current portion of long-term debt	718	765
Accounts payable	34,317	29,441
Accrued payroll and other compensation	9,158	10,273
Accrued taxes	469	1,728
Other accrued liabilities	5,869	4,143
Total current liabilities	50,531	46,350
Long-term debt	1,201	1,646
Deferred tax liabilities	6,989	3,902
Benefit plan liabilities	24,087	25,080
Other long-term liabilities	2,073	442
Commitments and Contingencies (Note 11)
Stockholders' equity:
Preferred stock	0	0
Common stock	2,404	2,379
Capital in excess of par value	61,285	58,784
Retained earnings	216,119	201,097
Accumulated other comprehensive loss	(16,095)	(18,366)
Treasury stock, at cost	(75,809)	(69,398)
Total stockholders' equity	187,904	174,496
Total liabilities and stockholders' equity	$ 272,785	$ 251,916