CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 51,128	$ 75,407
Accounts receivable, less allowances (2014 - $1,409; 2013 - $480)	100,828	52,301
Inventories	54,858	34,917
Prepaid expenses and other current assets	10,336	9,636
Total current assets	217,150	172,261
Property, plant and equipment, at cost	306,107	265,476
Accumulated depreciation	(189,454)	(186,613)
Net, property, plant and equipment	116,653	78,863
Goodwill	22,290	18,589
Other intangible assets, net	8,934	3,510
Other assets, net	1,613	1,462
Total assets	366,640	274,685
Current liabilities:
Current portion of long-term debt	673	663
Accounts payable	50,975	29,768
Accrued payroll and other compensation	9,946	10,393
Accrued taxes	2,664	1,816
Other accrued liabilities	8,081	6,044
Total current liabilities	72,339	48,684
Long-term debt	60,881	1,051
Deferred tax liabilities	15,090	8,747
Benefit plan liabilities	11,053	14,097
Other long-term liabilities	3,014	2,019
Commitments and Contingencies (Note 12)
Stockholders' equity:
Preferred stock	0	0
Common stock	2,432	2,410
Capital in excess of par value	63,426	62,284
Retained earnings	223,968	220,252
Accumulated other comprehensive loss	(9,069)	(8,844)
Treasury stock, at cost	(76,494)	(76,015)
Total stockholders' equity	204,263	200,087
Total liabilities and stockholders' equity	$ 366,640	$ 274,685