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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 |  |  |  |  |  |  |  |  |  |  |  |

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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration