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Commitments and Contingencies - Additional Information (Detail) MMBTU in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2020 USD ($) MMBTU Settlement $ / MMBTU T | Dec. 31, 2018 USD ($) | Dec. 31, 2019 USD ($) | Mar. 31, 2016 USD ($)
Commitments And Contingencies [Line Items] |  |  |  |
Outstanding letters of credit | $ 2,500,000 |  |  |
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 | 8,600,000 |  |  |
Settle of invoices held in account payable |  | $ 1,100,000 |  |
Recovery from litigation settlement |  | 4,600,000 |  |
Accrued liabilities for environmental matters | $ 468,000 |  |  |
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 |  |  |
Accrued prejudgment and post-judgment interest | 1,600,000 |  |  |
Global Industrial Inc [Member] |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |
Amount awarded for labor, service, materials and other | 7,400,000 |  |  |
Prejudgment Interest | $ 1,300,000 |  |  |
Percentage of accrue post judgement interest | 4.25% |  |  |
Property Plant And Equipment [Member] |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |
Recovery from litigation settlement |  | 200,000 |  |
Accrued accounts payable | $ 3,900,000 |  |  |
Depreciation expense | $ 500,000 |  |  |
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 | 2021-06 |  |  |
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 |  |  |
Nitric Acid Supply Agreement [Member] |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |
Required period for notice of termination | 180 days |  |  |
Supply commitment, description | The initial contract term began in 2021 and extends through 2027 |  |  |
Term of Renewal | 1 year |  |  |
Nitric Acid Supply Agreement [Member] | Minimum [Member] |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |
Quantity of Nitric Acid, Minimum | T | 70,000 |  |  |
Nitric Acid Supply Agreement [Member] | Maximum [Member] |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |
Quantity of Nitric Acid, Minimum | T | 100,000 |  |  |
Natural Gas Purchase Commitments [Member] |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |
Natural gas purchase commitments volume | MMBTU | 3.8 |  |  |
Weighted average cost of natural gas per unit | $ / MMBTU | 2.80 |  |  |
Weighted average purchase price of natural gas | $ 10,600,000 |  |  |
Weighted average natural gas market value per unit | $ / MMBTU | 2.36 |  |  |
Weighted average natural gas market value | $ 9,000,000.0 |  |  |
Pryor Chemical Company [Member] |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |
Litigation settlement received from other party |  | 4,000,000.0 |  |
Litigation settlement, expense paid |  | $ 500,000 |  |
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 |  |  |
EL Dorado Chemical Company [Member] |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |
Litigation settlement received from other party | $ 4,300,000 |  |  |
Litigation settlement, parts awarded from other party | 300,000 |  |  |
Litigation settlement, services and parts awarded from other party | 2,500,000 |  |  |
Litigation settlement, expense paid | 2,700,000 |  |  |
Settle of invoices held in account payable | 3,200,000 |  |  |
EL Dorado Chemical Company [Member] | Property Plant And Equipment [Member] |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |
Recovery from litigation settlement | 1,900,000 |  |  |
EL Dorado Chemical Company [Member] | Cost of Sales [Member] |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |
Recovery from litigation settlement | 5,700,000 |  |  |
Leidos Constructors, LLC [Member] |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |
Liability reserve | $ 0 |  | $ 0 |
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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