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Commitments and Contingencies - Additional Information (Detail) |  | 1 Months Ended | 6 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | ---
May. 01, 2015 USD ($) | Oct. 31, 2014 Violations | Jun. 30, 2015 USD ($) T | Dec. 31, 2002 Subsidiary | Dec. 31, 2012 USD ($)
Commitments And Contingencies [Line Items] |  |  |  |  |
Accrued liabilities for environmental matters |  |  | $ 497,000 |  |
Penalty related to discharge water permit |  |  |  |  | $ 100,000
Percentage of payment of investigation costs agreed by Hallowell Facility |  |  | 50.00% |  |
Insurance coverage of general liability risks |  |  | $ 100,000,000 |  |
Product liability deductible per claim |  |  | 250,000 |  |
Pre-litigation demand amount | $ 30,000,000 |  |  |  |
Estimated litigation liability |  |  | 0 |  |
Insurance Claims [Member] |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |
Accrued general liability insurance claims |  |  | 694,000 |  |
Insurance Policy One [Member] | Climate Control [Member] |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |
Product liability deductible per claim |  |  | 250,000 |  |
Insurance Policy Two [Member] | Climate Control [Member] |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |
Product liability deductible per claim |  |  | $ 500,000 |  |
Orica International [Member] | Ammonium Nitrate Supply Agreement [Member] |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |
Ammonium nitrate supply agreement maturity date |  |  | Apr. 09, 2015 |  |
Notice of termination |  |  | Required notice of termination of one year |  |
Orica International [Member] | Ammonium Nitrate Supply Agreement [Member] | Minimum [Member] |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |
Current purchase agreement quantity with Orica International | T |  |  | 240,000 |  |
Hallowell Facility [Member] |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |
Number of subsidiaries under Chemical Business that sold their operating assets | Subsidiary |  |  |  | 2 |
El Dorado Facility [Member] | Nitric Acid Plant [Member] |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |
Project costs capitalized |  |  | $ 121,000,000 |  |
El Dorado Facility [Member] | Ammonia Plant [Member] |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |
Project costs capitalized |  |  | 243,000,000 |  |
El Dorado Facility [Member] | Minimum [Member] | Nitric Acid Plant [Member] |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |
Estimated range of project costs to construct plant |  |  | 140,000,000 |  |
El Dorado Facility [Member] | Minimum [Member] | Ammonia Plant [Member] |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |
Estimated range of project costs to construct plant |  |  | 405,000,000 |  |
El Dorado Facility [Member] | Maximum [Member] | Nitric Acid Plant [Member] |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |
Estimated range of project costs to construct plant |  |  | 142,000,000 |  |
El Dorado Facility [Member] | Maximum [Member] | Ammonia Plant [Member] |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |
Estimated range of project costs to construct plant |  |  | 420,000,000 |  |
Cherokee Facility [Member] |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |
Accrued liabilities for environmental matters |  |  | 100,000 |  |
Number of alleged violations | Violations |  | 11 |  |  |
Environmental loss contingencies civil penalty |  |  | $ 26,000 |  |

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