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Commitments and Contingencies - Additional Information (Detail) (USD $) | 1 Months Ended |  |  | 3 Months Ended |  | 3 Months Ended
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Apr. 30, 2013 | Mar. 31, 2014 | Mar. 31, 2014 Insurance Claims [Member] | Mar. 31, 2014 Pryor Chemical Company[Member] Cases | Apr. 19, 2013 Pryor Chemical Company[Member] Cases | Mar. 31, 2014 Hallowell Facility [Member] Subsidiary | Mar. 31, 2014 Chemical Business [Member] Plant Facility | Mar. 31, 2014 Climate Control Business [Member] | Mar. 31, 2014 El Dorado Facility [Member] | Mar. 31, 2014 El Dorado Facility [Member] Nitric Acid Plant [Member] | Mar. 31, 2014 El Dorado Facility [Member] Ammonia Plant [Member] | Mar. 31, 2014 El Dorado Facility [Member] Minimum [Member] Nitric Acid Plant [Member] | Mar. 31, 2014 El Dorado Facility [Member] Minimum [Member] Ammonia Plant [Member] | Mar. 31, 2014 El Dorado Facility [Member] Maximum [Member] Nitric Acid Plant [Member] | Mar. 31, 2014 El Dorado Facility [Member] Maximum [Member] Ammonia Plant [Member] | Mar. 31, 2014 Amended Ammonium Nitrate Supply Agreement [Member] Orica International [Member] | Mar. 31, 2014 Amended Ammonium Nitrate Supply Agreement [Member] Orica International [Member] Minimum [Member] T
Commitments And Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated range of project costs to construct plant |  |  |  |  |  |  |  |  |  |  |  | $ 115,000,000 | $ 250,000,000 | $ 125,000,000 | $ 300,000,000 |  |
Project costs capitalized |  |  |  |  |  |  |  |  |  | 60,000,000 | 53,000,000 |  |  |  |  |  |
Current purchase agreement quantity with Orica International |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 240,000
Ammonium nitrate supply agreement maturity date |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Apr. 09, 2015 |
Notice of termination |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Required notice of termination of one year |
Accrued liabilities for environmental matters |  | 1,278,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating agreement maturity date |  |  |  |  |  |  |  |  | Dec. 31, 2053 |  |  |  |  |  |  |  |
Penalty related to discharge water permit |  | 100,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of nitric acid production facilities |  |  |  |  |  |  | 9 |  |  |  |  |  |  |  |  |  |
Plants compliant with Clean Air Act |  |  |  |  |  |  | 3 |  |  |  |  |  |  |  |  |  |
Minimum range of estimated capital cost to meet Clean Air Act emission rates |  |  |  |  |  |  | 2,000,000 |  |  |  |  |  |  |  |  |  |
Maximum range of estimated capital cost to meet Clean Air Act emission rates |  |  |  |  |  |  | 3,000,000 |  |  |  |  |  |  |  |  |  |
Plants requiring capital investment to achieve Clean Air Act compliance |  |  |  |  |  |  | 5 |  |  |  |  |  |  |  |  |  |
Reforestation mitigation estimated project costs |  |  |  |  |  |  | 150,000 |  |  |  |  |  |  |  |  |  |
Amount of civil penalty to be paid |  |  |  |  |  |  | 725,000 |  |  |  |  |  |  |  |  |  |
Amount of civil penalty |  |  |  | 100,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Number of alleged non-compliance issues |  |  |  |  | 14 |  |  |  |  |  |  |  |  |  |  |  |
Number of alleged violation resolved through a global settlement |  |  |  | 3 |  |  |  |  |  |  |  |  |  |  |  |  |
Number of alleged violations resolved through civil penalty payment |  |  |  | 11 |  |  |  |  |  |  |  |  |  |  |  |  |
Number of subsidiaries under Chemical Business that sold their operating assets |  |  |  |  |  | 2 |  |  |  |  |  |  |  |  |  |  |
Insurance coverage of general liability risks | 100,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product liability deductible per claim | 250,000 |  |  |  |  |  |  | 250,000 |  |  |  |  |  |  |  |  |
Accrued general liability insurance claims |  |  | $ 250,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |

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