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Commitments and Contingencies - Additional Information (Detail) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2018 USD ($) Settlement | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($) | Sep. 30, 2018 USD ($) | Mar. 31, 2016 USD ($)
Commitments And Contingencies [Line Items] |  |  |  |  |
Expenses incurred in operating lease agreements | $ 10,235,000 | $ 9,813,000 | $ 9,933,000 |  |
Outstanding letters of credit | 2,700,000 |  |  |  |
Customer advances and deposits | 1,783,000 | $ 1,334,000 |  |  |
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 | 6,200,000 |  |  |  |
Settle of invoices held in account payable | 1,100,000 |  |  |  |
Recovery from litigation settlement | 4,600,000 |  |  |  |
Accrued liabilities for environmental matters | $ 183,000 |  |  |  |
Penalty imposed to resolve outstanding permit violations |  |  |  | $ 124,000 |
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 |  |  |  |
Estimated litigation liability | 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] |  |  |  |  |
Initial terms of agreement expiry date | 2019-05 |  |  |  |
Notice of termination | notice of termination at least twelve months prior to the end of term |  |  |  |
Ammonia Supply Agreement [Member] |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |
Initial terms of agreement expiry date | 2020-06 |  |  |  |
Notice of termination | notice of termination at least nine months prior to the end of term |  |  |  |
Supply commitment, description | the ammonia that (a) will be produced at the El Dorado Facility and (b) that is in excess of El Dorado’s needs. |  |  |  |
Pryor Chemical Company [Member] |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |
Litigation settlement, expense paid | $ 500,000 |  |  |  |
Litigation settlement,received | $ 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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