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Long Term Debt (Details Textual) (USD $)
In Millions, except Share data in Thousands, unless otherwise specified
 3 Months Ended 3 Months Ended
Mar. 31, 2011
Mar. 31, 2012
Mar. 31, 2012
Working Capital Revolver Loan [Member]
Mar. 31, 2012
Secured Term Loan due 2012 [Member]
Mar. 31, 2012
Other long-term debt [Member]
Mar. 31, 2011
5.5% senior subordinated notes due 2012 [Member]
Debt Instrument [Line Items]            
Maximum amount of revolving credit facility     $ 50      
Working capital revolver loan requirements     EBITDA requirement of greater than $25 million; a minimum fixed charge coverage ratio of not less than 1.10 to 1; and a maximum senior leverage coverage ratio of not greater than 4.50 to 1.      
Original principal amount of secured term loan       50    
Modified principal amount of secured loan       60    
Amended additional principal amount of secured loan       15    
Amended principal amount of secured loan       75    
Periodic principal payment of secured loan       0.9    
Interest and final balloon payment of secured loan       56.3    
Secured term loan interest Rate Basis       Three month Libor plus 300 basis points adjusted quarterly    
Borrowing interest rate basis spread       3.00%    
Period for LIBOR       3 months    
Carrying value of the pledged assets       73    
Carrying value of restricted net assets       80    
Secured term loan agreement requirements       Borrowers are also subject to a minimum fixed charge coverage ratio of not less than 1.10 to 1 and a maximum leverage ratio of not greater than 4.50 to 1    
Percentage of principal amount as prepayment premium       1.00%    
Weighted average interest rate of other debt   4.03%     6.83%  
Maturity date of original secured term loan       November 2, 2012    
Maturity date of amended secured term loan       March 29, 2016    
End date of prepayment premium period       Mar. 29, 2014    
Debt instrument, interest rate           5.50%
Long-Term Debt (Textual) [Abstract]            
Principal amounts converted $ 24.4          
Shares of LSB common stock issued 888,160