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Commitments and Contingencies (Details Textual) (USD $)
 1 Months Ended 12 Months Ended 1 Months Ended 12 Months Ended 12 Months Ended
May 31, 2008
Dec. 31, 2011
Plant
Dec. 31, 2010
Dec. 31, 2009
Jun. 30, 2011
Jul. 31, 2007
Class C Preferred Stock [Member]
Nov. 30, 2006
Class C Preferred Stock [Member]
Dec. 31, 2011
Class C Preferred Stock [Member]
Dec. 31, 2007
Class C Preferred Stock [Member]
Dec. 31, 2011
Insurance Claims [Member]
Dec. 31, 2011
Hallowell Facility [Member]
Entity
Dec. 31, 2011
Orica International [Member]
T
Dec. 31, 2011
Climate Control Business [Member]
Dec. 31, 2011
Chemical Business [Member]
Segment Reporting Information [Line Items]                            
Current portion of accrued and other liabilities   $ 28,677,000 $ 31,507,000               $ 105,000      
Current purchase agreement quantity with Orica International                       240,000    
Customer advances and deposits   4,500,000                     300,000 3,800,000
Accrued general liability insurance claims                   739,000        
Renewal period for discharge water permit                           5 years
Maximum penalty amount per day under Clean Air Act                           27,500
No. of nitric acid affected plant   9                        
Number of subsidiaries under chemical business that sold their operating assets                     2      
Product liability deductible per claim                         250,000  
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]                            
Class C Series 2 preferred stock               $ 3.25            
Maximum number of shares to be received under agreement             180,450              
Total number of shares held by Jayhawk Group             340,900              
Number of common shares for each convertible preferred stock                 7.4          
Common stock issued on conversion           4.329                
Jayhawk Group asserted damage claim relating to preferred               12,000,000            
Month purchase commitment period ends for natural gas               Aug. 01, 2012            
Commitments and Contingencies (Textual) [Abstract]                            
Expenses incurred in operating lease agreements   7,773,000 6,079,000 8,584,000                    
Term of purchase commitment   P5Y                        
Purchase commitments of natural gas in mmbtu   3,000,000                        
Weighted average cost of natural gas per mmbtu   $ 3.62                        
Total cost of natural gas in mmbtu   10,900,000                        
Total market value of natural gas in mmbtu   9,200,000                        
Weighted average market value of natural gas per mmbtu   $ 3.06                        
Total market value of natural gas in mmbtu   9,200,000                        
Outstanding letters of credit   1,900,000                        
Indemnify the sureties for payments   12,200,000                        
Maximum amount of securities can be sold under shelf registration statement   200,000,000                        
Payments under employment and severance agreements   12,600,000                        
Asset retirement obligations   75,000                        
Penalty related to discharge water permit         124,000                  
Liability relating to discharge water permit   124,000                        
Capital cost in connection with construction of pipeline   4,000,000                        
Capitalized cost of construction of pipeline   500,000                        
Estimated share of the annual operating cost of pipeline, minimum   100,000                        
Estimated share of the annual operating cost of pipeline, maximum   150,000                        
Jayhawk Group's offer to settle litigation 100,000                          
Cumulative Jayhawk litigation expense   250,000                        
Product liability   0                        
Estimated cost of additional remediation   100,000                        
Estimated EPA civil penalty liability   $ 100,000