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Revenue From Contracts With Customers
 12 Months Ended
Dec. 31, 2024
Revenue from Contract with Customer [Abstract]  
Revenue from Contracts with Customers Revenue from Contracts with Customers
Disaggregation of Revenue
    The following table provides information about disaggregated revenue by type of product and contract:
Year Ended December 31,
202420232022
(Dollars in thousands)
Graphite Electrodes - LTAs$116,786 $253,262 $870,287 
Graphite Electrodes - Non-LTAs376,858 338,746 351,140 
By-products and other45,138 28,492 59,823 
Total Revenues$538,782 $620,500 $1,281,250 
Contract Balances
Substantially all the Company's receivables relate to contracts with customers. Accounts receivable are recorded when the right to consideration becomes unconditional. Payment terms on invoices primarily range from 20 to 120 days depending on the customary business practices of the jurisdictions in which we do business.
    Certain short-term and longer-term sales contracts require up-front payments prior to the Company’s fulfillment of any performance obligation. These contract liabilities are recorded as current or long-term deferred revenue, depending on the lag between the prepayment and the expected delivery of the related products. Additionally, deferred revenue or contract assets originate from contracts where the allocation of the transaction price to the performance obligations based on their relative stand-alone selling prices results in the timing of revenue recognition being different from the timing of the invoicing. In this case, deferred revenue is amortized into revenue based on the transaction price allocated to the remaining performance obligations and contract assets are realized through the contract invoicing.
    The Company did not have any contract asset balances as of December 31, 2024 or 2023.
Current deferred revenue is included in "Other accrued liabilities" on the Consolidated Balance Sheets. The following table provides our contract liability balances as of December 31, 2024 and 2023.
December 31, 2024December 31, 2023
(Dollars in thousands)
Current deferred revenue$11,223 $31,583 
The amount of revenue recognized in 2024 that was included in the December 31, 2023 current deferred revenue balance was $26.0 million. The decrease in the December 31, 2024 current deferred revenue balance versus the prior year was primarily due to revenue recognized in the current year, partially offset by customer prepayments. The amount of revenue recognized in 2023 that was included in the December 31, 2022 deferred revenue current balance was $13.0 million.