v2.4.0.6
Income Taxes (Narrative) (Details) (USD $)
 3 Months Ended 12 Months Ended
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2011
Dec. 31, 2010
Sep. 30, 2010
Jun. 30, 2010
Mar. 31, 2010
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Income Taxes [Line Items]                      
Income tax expense $ (1,129,000) $ (1,712,000) $ 2,039,000 $ (2,172,000) $ (1,051,000) $ (1,182,000) $ 986,000 $ 1,070,000 $ (2,974,000) $ (177,000) $ 5,938,000
Current federal alternative minimum tax and state income tax liabilities                 300,000 600,000 700,000
Current foreign income tax expense                 1,060,000 1,159,000 139,000
Deferred Total                 (4,356,000) (1,938,000) 5,096,000
Deferred tax expense (benefit)                 (4,356,000) (1,938,000) 5,096,000
Valuation allowance 2,700,000       1,000,000       2,700,000 1,000,000  
Deferred tax assets, valuation allowance 2,741,000       1,027,000       2,741,000 1,027,000 3,550,000
Operating loss carryforwards 26,400,000       16,600,000       26,400,000 16,600,000  
Alternative minimum tax credit carryforwards 1,500,000               1,500,000    
Research and development credit carryforwards 700,000               700,000    
Tax credit carry forward, expiration dates                 2025    
Impact of shortfalls in income tax expense                 100,000 900,000  
Unrecognized tax benefits which impact effective tax rate 1,400,000       2,400,000       1,400,000 2,400,000 1,200,000
Unrecognized tax benefits to be reversed in next year due to filing of related tax returns and expiration of statute of limitations                 100,000    
Accrued interest and penalties on unrecognized tax benefits 600,000               600,000    
Accrued interest expense on unrecognized tax benefits         800,000         800,000  
Foreign [Member]
                      
Income Taxes [Line Items]                      
Deferred tax assets, valuation allowance 1,300,000       2,800,000       1,300,000 2,800,000  
Increase in deferred tax assets valuation allowance                 400,000 300,000  
Operating loss carryforwards 30,600,000               30,600,000    
Operating loss carryforwards expiration date                 2013    
Undistributed foreign earnings 2,600,000               2,600,000    
Federal [Member]
                      
Income Taxes [Line Items]                      
Operating loss carryforwards 50,800,000       51,900,000       50,800,000 51,900,000  
Operating loss carryforwards expiration date                 2022    
State [Member]
                      
Income Taxes [Line Items]                      
Operating loss carryforwards 36,900,000       37,300,000       36,900,000 37,300,000  
Operating loss carryforwards expiration date                 2013    
Impact of shortfalls in income tax expense                 $ 200,000