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v3.22.0.1

Contingencies - Narratives (Details) $ in Thousands | 1 Months Ended | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Jun. 30, 2021 USD ($) | Jun. 30, 2021 USD ($) | Dec. 31, 2021 USD ($) shares | May 31, 2021 | Dec. 31, 2020 USD ($)
Loss Contingencies [Line Items] |  |  |  |  |
Related Party Tax Agreement Percent Of Savings |  |  | 85.00% |  |
Due to Related Parties |  |  | $ 19,300 |  | $ 40,900
Related party payable - tax receivable agreement |  |  | 3,828 |  | 21,752
Related party payable - tax receivable agreement long-term |  |  | 15,455 |  | $ 19,098
Increase (Decrease) in Due to Related Parties |  |  | $ 200 |  |
Change in Control, Ownership Percentage Disposal, Threshold |  |  | 100.00% |  |
Plan |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Equity Method Investment, Ownership Percentage | 30.00% | 30.00% | 30.00% |  |
GrafTech International Ltd [Member] | Brookfield [Member] |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Equity Method Investment, Ownership Percentage |  |  | 24.30% | 24.00% | 55.30%
LTIP |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Loss Contingency, Loss in Period |  | $ 73,400 |  |  |
Loss Contingency Accrual, Payments |  |  | $ 71,400 |  |
LTIP | Cost of sales |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Loss Contingency, Loss in Period |  | 30,700 |  |  |
LTIP | Selling, General and Administrative Expenses |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Loss Contingency, Loss in Period |  | $ 42,700 |  |  |
Fixed Price LTAs |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Loss Contingency, Damages Sought, Value | $ 61,000 |  |  |  |
London Interbank Offered Rate (LIBOR) [Member] |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Due to Related Party, Basis Spread on Variable Rate |  |  | 0.0100 |  |
Profit Units | LTIP |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Number of Shares Authorized (in shares) | shares |  |  | 30,000 |  |
Award vesting period |  |  | 5 years |  |

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