Consolidated Condensed Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Current assets:
Cash	$ 6,408	$ 7,263
Receivables	54,658	50,133
Inventories:
Finished goods	18,113	17,704
Work in process	11,678	12,330
Raw materials	34,187	30,905
Total inventories	63,978	60,939
Prepaid expenses and other current assets	3,354	3,994
Deferred income taxes	4,900	4,834
Total current assets	133,298	127,163
Property, plant and equipment, at cost	167,537	164,138
Less accumulated depreciation	(90,236)	(87,722)
Net property, plant and equipment	77,301	76,416
Intangible assets, at cost less accumulated amortization	56,058	57,317
Prepaid pension	4,540	4,312
Other assets	7,786	6,155
Goodwill	44,695	44,695
Total assets	323,678	316,058
Current liabilities:
Short-term debt	73,869	70,045
Payables	17,433	18,554
Accrued compensation and employee benefits	7,184	7,337
Warranty and after-sale costs	1,199	882
Income and other taxes	3,072	1,223
Total current liabilities	102,757	98,041
Other long-term liabilities	1,335	1,324
Deferred income taxes	9,798	9,790
Accrued non-pension postretirement benefits	5,918	5,934
Other accrued employee benefits	4,067	4,406
Commitments and contingencies (Note 6)
Shareholders’ equity:
Common stock	20,518	20,504
Capital in excess of par value	46,339	45,627
Reinvested earnings	172,371	170,318
Accumulated other comprehensive loss	(7,263)	(7,524)
Less: Employee benefit stock	(995)	(1,075)
Treasury stock, at cost	(31,167)	(31,287)
Total shareholders’ equity	199,803	196,563
Total liabilities and shareholders’ equity	$ 323,678	$ 316,058