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Income Taxes (Details Textual) (USD $)
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Income Taxes (Additional Textual) [Abstract]      
State net operating loss carryforwards $ 18,000,000    
Deferred tax liability 600,000    
State tax credit carryforwards 298,000    
Undistributed foreign earnings 1,700,000    
Unrecognized tax benefits 1,400,000    
Accrued interest related to uncertain tax positions 172,000 72,000  
Interest for uncertain tax positions 100,000 8,000 4,000
Net tax Expense (Benefit) $ 5,521,000 $ 9,618,000 $ (1,648,000)
Federal statutory rate 35.00%    
State and Local Jurisdiction [Member]
      
Income Taxes (Textual) [Abstract]      
Net operating loss carryforwards expiration date, lower limit 2018    
Net operating loss carryforwards expiration date, upper limit 2030    
Tax carryforwards expiration year 2019