Consolidated Condensed Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Current assets:
Cash	$ 3,787	$ 6,554
Receivables	47,304	45,584
Inventories:
Finished goods	20,598	19,872
Work in process	11,590	13,340
Raw materials	26,313	27,785
Total inventories	58,501	60,997
Prepaid expenses and other current assets	3,932	4,343
Deferred income taxes	3,926	3,896
Total current assets	117,450	121,374
Property, plant and equipment, at cost	155,350	152,760
Less accumulated depreciation	(84,467)	(82,276)
Net property, plant and equipment	70,883	70,484
Intangible assets, at cost less accumulated amortization	57,129	58,351
Other assets	5,400	4,314
Goodwill	35,930	35,930
Total assets	286,792	290,453
Current liabilities:
Short-term debt	63,878	66,730
Payables	16,710	15,551
Accrued compensation and employee benefits	6,852	9,821
Warranty and after-sale costs	717	881
Income and other taxes	1,265	1,097
Total current liabilities	89,422	94,080
Other long-term liabilities	1,545	1,086
Deferred income taxes	8,663	8,692
Accrued non-pension postretirement benefits	6,519	6,489
Other accrued employee benefits	8,128	8,859
Commitments and contingencies (Note 6)
Shareholders' equity:
Common stock	20,473	20,441
Capital in excess of par value	42,652	41,755
Reinvested earnings	156,182	155,694
Accumulated other comprehensive loss	(14,307)	(13,948)
Less: Employee benefit stock	(1,135)	(1,234)
Treasury stock, at cost	(31,350)	(31,461)
Total shareholders’ equity	172,515	171,247
Total liabilities and shareholders’ equity	$ 286,792	$ 290,453