CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 58,542	$ 63,623
Accounts receivable, less allowances (2013 - $423; 2012 - $469)	57,039	47,486
Inventories	37,665	31,292
Prepaid expenses and other current assets	10,114	9,400
Total current assets	163,360	151,801
Property, plant and equipment, at cost	253,110	249,206
Accumulated depreciation	(178,052)	(172,952)
Net, property, plant and equipment	75,058	76,254
Goodwill	18,272	18,282
Other intangible assets	3,451	3,825
Other assets, net	1,252	1,754
Total assets	261,393	251,916
Current liabilities:
Current portion of long-term debt	693	765
Accounts payable	31,055	29,441
Accrued payroll and other compensation	10,386	10,273
Accrued taxes	1,671	1,728
Other accrued liabilities	5,290	4,143
Total current liabilities	49,095	46,350
Long-term debt	1,314	1,646
Deferred tax liabilities	5,595	3,902
Benefit plan liabilities	24,376	25,080
Other long-term liabilities	1,362	442
Commitments and Contingencies (Note 11)
Stockholders' equity:
Preferred stock	0	0
Common stock	2,402	2,379
Capital in excess of par value	60,531	58,784
Retained earnings	211,544	201,097
Accumulated other comprehensive loss	(19,033)	(18,366)
Treasury stock, at cost	(75,793)	(69,398)
Total stockholders’ equity	179,651	174,496
Total liabilities and stockholders’ equity	$ 261,393	$ 251,916