Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Current assets:
Cash	$ 4,975	$ 3,089
Receivables	41,168	40,429
Inventories:
Finished goods	13,476	9,800
Work in process	11,377	15,284
Raw materials	24,583	23,232
Total inventories	49,436	48,316
Prepaid expenses and other current assets	2,266	2,381
Deferred income taxes	3,350	3,122
Total current assets	101,195	97,337
Property, plant and equipment, at cost:
Land and improvements	8,011	7,874
Buildings and improvements	49,840	48,014
Machinery and equipment	87,077	88,066
Total property and equipment	144,928	143,954
Less accumulated depreciation	(78,826)	(77,866)
Net property, plant and equipment	66,102	66,088
Intangible assets, at cost less accumulated amortization	33,680	34,170
Other assets	6,259	7,449
Deferred income taxes	2,309	1,658
Goodwill	9,365	9,162
Total assets	218,910	215,864
Current liabilities:
Short-term debt	1,790	12,878
Payables	11,365	11,159
Accrued compensation and employee benefits	6,734	7,143
Warranty and after-sale costs	1,593	889
Income and other taxes	931	610
Total current liabilities	22,413	32,679
Other long-term liabilities	1,078	2,472
Accrued non-pension postretirement benefits	6,103	5,972
Other accrued employee benefits	10,035	6,358
Commitments and contingencies (Note 6)
Shareholders' equity:
Common Stock, $1 par; authorized 40,000,000 shares; issued 21,292,030 shares in 2011 and 21,258,850 shares in 2010	21,292	21,259
Capital in excess of par value	39,445	37,582
Reinvested earnings	166,271	156,101
Accumulated other comprehensive loss	(14,566)	(13,137)
Less: Employee benefit stock	(1,485)	(1,536)
Treasury stock, at cost; 6,169,329 shares in 2011 and 6,210,361 shares in 2010	(31,676)	(31,886)
Total shareholders' equity	179,281	168,383
Total liabilities and shareholders' equity	$ 218,910	$ 215,864