Consolidated Balance Sheets (unaudited) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 19,450	$ 22,745
Trade receivables, net	69,751	71,276
Other receivables	11,551	12,943
Inventories, net	103,006	89,965
Prepaid expenses and other current assets	9,224	5,631
Total current assets	212,982	202,560
Property, plant and equipment, net	170,164	171,966
Goodwill	47,811	38,670
Intangible assets, net	8,566	4,011
Investments in and advances to partially-owned affiliates	787	13,364
Deferred income taxes	30,102	19,799
Other non-current assets	5,658	7,667
Total assets	476,070	458,037
Current liabilities:
Accounts payable	28,490	29,052
Deferred revenue	22,131	20,121
Accrued expenses and other current liabilities	47,501	48,098
Total current liabilities	98,122	97,271
Long-term debt	74,000	79,250
Deferred income taxes	13,353	12,835
Accrued pension benefits	37,614	40,123
Other non-current liabilities	17,444	18,338
Total liabilities	240,533	247,817
Stockholders' equity:
Common stock, $.10 par value; authorized 100,000,000, issued 32,437,445 and 32,240,795 shares at respective dates	3,243	3,223
Additional paid-in capital	113,495	109,765
Retained earnings	151,827	131,178
Treasury stock, at cost, 1,757,530 and 1,757,530 shares at respective dates	(14,984)	(14,984)
Accumulated other comprehensive loss	(18,044)	(18,962)
Total stockholders' equity	235,537	210,220
Total liabilities and stockholders' equity	$ 476,070	$ 458,037