Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 118,403	$ 74,141
Trade receivables, net	81,776	110,622
Other receivables	7,901	6,748
Inventories, net	164,913	123,184
Prepaid expenses and other current assets	5,089	7,960
Total current assets	378,082	322,655
Property, plant and equipment, net	248,945	217,092
Goodwill	43,200	40,323
Intangible assets, net	14,229	14,800
Deferred income taxes	10,512	13,061
Other non-current assets	3,383	3,934
Total assets	698,351	611,865
Current liabilities:
Accounts payable	39,874	42,873
Deferred revenue and advance payments	8,024	7,506
Taxes payable	463	9,469
Accrued expenses and other current liabilities	35,856	35,614
Total current liabilities	84,217	95,462
Advance payments	39,000	39,000
Deferred income taxes	9,103	6,921
Accrued pension benefits	44,267	43,109
Other non-current liabilities	23,887	21,946
Total liabilities	200,474	206,438
Stockholders' equity:
Common stock, $.10 par value; authorized 100,000,000, issued 34,207,225 and 33,927,595 shares at respective dates	3,421	3,393
Additional paid-in capital	162,140	153,681
Retained earnings	389,567	327,376
Treasury stock, at cost, 1,433,649 and 1,583,909 shares at respective dates	(12,221)	(13,503)
Accumulated other comprehensive loss	(45,030)	(65,520)
Total stockholders' equity	497,877	405,427
Total liabilities and stockholders' equity	$ 698,351	$ 611,865