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Contingencies (Details) - USD ($) $ in Thousands | 1 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
May 26, 2021 | Jun. 30, 2021 | Dec. 31, 2020
Movement in Standard and Extended Product Warranty Accrual, Increase (Decrease) |  |  |
Balance as of December 31, 2020 |  | $ 1,997 |
Product warranty accruals and adjustments |  | 722 |
Settlements |  | (793) |
Balance as of June 30, 2021 |  | $ 1,926 | $ 1,997
Loss Contingencies |  |  |
Related party tax agreement percent of savings |  | 85.00% |
Due to Related Parties |  | $ 19,100 | 40,900
due to related party |  | 3,922 | 21,752
Long-term debt - affiliate |  | $ 15,176 | $ 19,098
Outstanding Voting Power Percentage Scenario 1 |  | 30.00% |
Loss Contingency Accrual, Payments |  | $ 61,500 |
GrafTech International Ltd | Brookfield |  |  |
Loss Contingencies |  |  |
Subsidiary or Equity Method Investee, Cumulative Percentage Ownership after All Transactions | 24.00% | 23.90% | 55.30%
Cost of sales |  |  |
Loss Contingencies |  |  |
Loss Contingency, Loss in Period |  | $ 30,700 |
Selling, General and Administrative Expenses |  |  |
Loss Contingencies |  |  |
Loss Contingency, Loss in Period |  | $ 42,700 |
LIBO |  |  |
Loss Contingencies |  |  |
Due to Related Party, Basis Spread on Variable Rate |  | 0.0100 |
Minimum |  |  |
Loss Contingencies |  |  |
Loss Contingency, Loss in Period |  | $ 73,400 |
Profit Units [Member] | Long-term Incentive Plan [Member] |  |  |
Loss Contingencies |  |  |
Number of shares authorized |  | 30,000 |
Award vesting period |  | 5 years |
Outstanding Voting Power Percentage Minimum |  | 0.30 |

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