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Commitments and Contingencies - Additional Information (Detail) MMBTU in Millions | 1 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Mar. 31, 2019 USD ($) | Dec. 31, 2019 USD ($) MMBTU Settlement $ / MMBTU | Dec. 31, 2018 USD ($) | Mar. 31, 2016 USD ($)
Commitments And Contingencies [Line Items] |  |  |  |
Outstanding letters of credit |  | $ 2,800,000 |  |
Estimated share of the annual operating costs of pipeline, minimum |  | 100,000 |  |
Estimated share of the annual operating costs of pipeline, maximum |  | $ 150,000 |  |
Operating agreement |  | The initial term of the operating agreement is through December 2053. |  |
Indemnify the sureties for payments |  | $ 10,000,000 |  |
Payments under employment and severance agreements |  | 8,300,000 |  |
Settle of invoices held in account payable |  |  | $ 1,100,000 |
Recovery from litigation settlement |  |  | 4,600,000 |
Accrued liabilities for environmental matters |  | $ 183,000 |  |
Percentage of payment of investigation costs agreed by Hallowell Facility |  | 50.00% |  |
Insurance coverage of general liability and auto liability risks |  | $ 100,000,000 |  |
Product liability deductible per claim |  | $ 250,000 |  |
Confidential settlement agreement with family groups | Settlement |  | 3 |  |
Liability reserve |  | $ 0 |  |
Litigation liability paid to other party | $ 18,500,000 |  |  |
Estimated litigation liability |  | $ 0 | 18,450,000 |
Global Industrial Inc [Member] |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |
Estimated litigation liability |  |  |  | $ 0
Property, Plant and Equipment [Member] |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |
Recovery from litigation settlement |  |  | 200,000 |
Cost of Sales [Member] |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |
Recovery from litigation settlement |  |  | 4,400,000 |
UAN Supply Agreement [Member] |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |
Current terms of agreement expiry date |  | 2020-05 |  |
Ammonia Supply Agreement [Member] |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |
Current terms of agreement expiry date |  | 2022-06 |  |
Supply commitment, description |  | the ammonia that (a) will be produced at the El Dorado Facility and (b) a portion that is in excess of EDC’s needs as defined. |  |
Notice of termination |  | notice of termination at least nine months prior to the end of term |  |
Natural Gas Purchase Commitments [Member] |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |
Natural gas purchase commitments volume | MMBTU |  | 7.0 |  |
Weighted average cost of natural gas per unit | $ / MMBTU |  | 2.23 |  |
Weighted average purchase price of natural gas |  | $ 15,700,000 |  |
Weighted average natural gas market value per unit | $ / MMBTU |  | 2.06 |  |
Weighted average natural gas market value |  | $ 14,500,000 |  |
Pryor Chemical Company [Member] |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |
Litigation settlement, expense paid |  |  | 500,000 |
Litigation settlement received from other party |  |  | $ 4,000,000 |
Pryor Chemical Company [Member] | UAN Supply Agreement [Member] |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |
Required period for notice of termination |  | 90 days |  |
Coffeyville Resources Nitrogen Fertilizers L.L.C. [Member] | UAN Supply Agreement [Member] |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |
Required period for notice of termination |  | 180 days |  |
Leidos Constructors, LLC [Member] | Global Industrial Inc [Member] | Accounts Payable [Member] |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |
Claim amount not approved for payment |  |  |  | $ 3,500,000

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