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Segment Information (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Dec. 31, 2011
Segment Information          
Revenues from external customers $ 86,586 $ 101,143 $ 289,929 $ 328,371  
Net income (loss) 3,115 4,702 16,062 16,034  
Total assets 261,064 268,978 261,064 268,978 259,461
Metal Bearing Components Segment [Member]
          
Segment Information          
Revenues from external customers 58,298 72,476 196,196 241,084  
Net income (loss) 4,503 6,064 17,718 24,794  
Total assets 199,063 198,408 199,063 198,408  
Precision Metal Components Segment [Member]
          
Segment Information          
Revenues from external customers 17,132 17,910 61,005 53,846  
Net income (loss) 1,649 (468) 5,199 (3,806)  
Total assets 37,830 45,728 37,830 45,728  
Plastic and Rubber Components Segment [Member]
          
Segment Information          
Revenues from external customers 11,156 10,757 32,728 33,441  
Net income (loss) 245 117 2,005 1,853  
Total assets 20,629 20,868 20,629 20,868  
Corporate and Consolidations [Member]
          
Segment Information          
Net income (loss) (3,282) (1,011) (8,860) (6,807)  
Total assets $ 3,542 $ 3,974 $ 3,542 $ 3,974