Consolidated Balance Sheets (unaudited) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 21,780	$ 22,745
Trade receivables, net	41,674	71,276
Other receivables	11,803	12,943
Inventories, net	98,738	89,965
Prepaid expenses and other current assets	8,241	5,631
Total current assets	182,236	202,560
Property, plant and equipment, net	169,600	171,966
Goodwill	38,663	38,670
Intangible assets, net	3,944	4,011
Investments in and advances to partially-owned affiliates	13,864	13,364
Deferred income taxes	29,703	19,799
Other non-current assets	6,650	7,667
Total assets	444,660	458,037
Current liabilities:
Accounts payable	26,869	29,052
Deferred revenue	23,217	20,121
Accrued expenses and other current liabilities	41,784	48,098
Total current liabilities	91,870	97,271
Long-term debt	60,000	79,250
Deferred income taxes	22,852	12,835
Accrued pension benefits	38,954	40,123
Other non-current liabilities	17,662	18,338
Total liabilities	231,338	247,817
Stockholders' equity:
Common stock, $.10 par value; authorized 100,000,000, issued 32,379,795 and 32,240,795 shares at respective dates	3,237	3,223
Additional paid-in capital	112,022	109,765
Retained earnings	132,160	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	(19,113)	(18,962)
Total stockholders' equity	213,322	210,220
Total liabilities and stockholders' equity	$ 444,660	$ 458,037