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Long Term Debt (Details Textual) (USD $)
 1 Months Ended 9 Months Ended 1 Months Ended 9 Months Ended
Mar. 31, 2011
Jan. 31, 2011
Sep. 30, 2012
Jul. 31, 2011
Sep. 30, 2012
Working Capital Revolver Loan [Member]
May 26, 2011
Secured Term Loan [Member]
Sep. 30, 2012
Secured Term Loan [Member]
Mar. 29, 2011
Secured Term Loan [Member]
Sep. 30, 2012
Other long-term debt [Member]
Sep. 30, 2012
5.5% senior subordinated notes due 2012 [Member]
Sep. 30, 2011
5.5% senior subordinated notes due 2012 [Member]
Mar. 31, 2011
5.5% senior subordinated notes due 2012 [Member]
Debt Instrument [Line Items]                        
Maximum amount of revolving credit facility         $ 50,000,000              
Description of Interest rate of Revolving Credit Facility         Interest at a base rate (generally equivalent to the prime rate) plus .50% if borrowing availability is greater than $25 million, otherwise plus .75% (previously plus .50% only) or, at our option, accrues interest at LIBOR plus 1.50% if borrowing availability is greater than $25 million, otherwise plus 1.75% (previously plus 1.75% only).              
Line of credit facility, interest rate         3.75%              
Letter of credit maximum capacity         15,000,000              
Remaining borrowing capacity of revolving credit facility         48,400,000              
Fees Expressed as percentage for unused letters of credit         1.00%              
Fees expressed as percentage for unused revolving credit facility         0.25%              
Original fees expressed as percentage for unused revolving credit facility         0.375%              
Working capital revolver loan requirements         The Working Capital Revolver Loan continues to require ThermaClime to meet a minimum fixed charge coverage ratio of not less than 1.10 to 1 measured on an annual basis, but the maximum senior leverage coverage ratio of not greater than 4.50 to 1 and the EBITDA requirement of greater than $25 million financial covenants have been eliminated.              
Original principal amount of secured term loan               50,000,000        
Modified principal amount of secured loan               60,000,000        
Amended additional principal amount of secured loan           15,000,000            
Amended principal amount of secured loan           75,000,000            
Periodic principal payment of secured loan             900,000          
Interest and final balloon payment of secured loan             56,300,000          
Secured term loan variable 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         85,000,000   261,000,000          
Carrying value of restricted net assets             86,000,000          
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     3.96%           6.84%      
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% 5.50% 5.50%
Working capital revolver loan amendment date         Apr. 04, 2012              
Amended working capital revolver loan maturity date         Mar. 29, 2016              
Amended working capital revolver loan maturity date conditional extension         Apr. 13, 2017              
Long-Term Debt (Textual) [Abstract]                        
Principal amounts converted $ 24,400,000     $ 2,000,000                
Shares of LSB common stock issued 888,160 72,800