COMMITMENTS AND CONTINGENCIES - Additional Information (Details) |
12 Months Ended | |||||
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Dec. 31, 2019
USD ($)
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Dec. 31, 2018
USD ($)
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Dec. 31, 2017
USD ($)
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Dec. 31, 2019
SAR (ر.س)
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Oct. 24, 2010
USD ($)
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Oct. 24, 2010
SAR (ر.س)
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| Guarantor Obligations [Line Items] | ||||||
| Undelivered feedstock | $ 3,500,000 | $ 3,900,000 | ||||
| Mine closure and environmental | 868,000 | $ 745,000 | $ 593,000 | |||
| Saudi Industrial Development Fund Limited Guarantee | ||||||
| Guarantor Obligations [Line Items] | ||||||
| Loan guarantee | 41.00% | 41.00% | ||||
| Principal amount of loan guaranteed | $ 88,000,000.0 | ر.س 330,000,000.0 | ||||
| Amount of maximum exposure | $ 73,300,000 | ر.س 275,000,000 | $ 36,100,000 | ر.س 135,300,000 | ||
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- Definition The percentage guaranteed of the principal amount of the loan as of the balance sheet date. No definition available.
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- Definition The total principal amount of the loan guaranteed to the cost method investee. No definition available.
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- Definition The charge against earnings in the period for known or estimated future costs arising from requirements to perform environmental remediation activities. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of the unrecorded obligation to transfer funds in the future for fixed or minimum amounts or quantities of goods or services at fixed or minimum prices (for example, as in take-or-pay contracts or throughput contracts). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Details
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