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Accounts Receivable and Note Receivable - Narrative (Details) - USD ($) $ in Thousands | 1 Months Ended | 3 Months Ended | 9 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Apr. 30, 2024 | Jun. 30, 2022 | Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024 | Feb. 28, 2025 | Dec. 31, 2024 | Jan. 31, 2020 | Jan. 01, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |  |
Trade accounts receivable |  |  | $ 291,674 |  | $ 291,674 |  |  | $ 275,804 |  |
Trade accounts receivable, net |  |  | 281,072 |  | 281,072 |  |  | 260,690 |  |
Accounts receivable under factoring arrangement, program capacity |  |  | 21,100 |  | 21,100 |  |  | 18,600 |  |
Note receivable, face value |  |  |  |  |  |  |  |  | $ 40,000 |
Note receivable, interest rate |  |  |  |  |  |  |  |  | 2.50% |
Accounts receivable past due by twelve months or more |  |  | 5,700 |  | 5,700 |  |  |  |  |
Interest income |  |  | 552 | $ 981 | 1,476 | $ 6,113 |  |  |  |
Proceeds from notes receivable |  |  |  |  | 0 | 17,023 |  |  |  |
Credit loss recovery, previous reserved customer balance |  |  | 1,200 |  | 3,400 |  |  |  |  |
Greater than 12 months |  |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |  |
Trade accounts receivable |  |  | 7,900 |  | 7,900 |  |  |  |  |
Harsco Industrial IKG | Disposal Group, Disposed of by Sale, Not Discontinued Operations |  |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |  |
Selling price |  |  |  |  |  |  |  |  |  | $ 85,000
Interest income | $ 2,700 |  |  |  |  |  |  |  |  |
Proceeds from notes receivable | $ 17,000 |  |  |  |  |  |  |  |  |
Accounts Receivable Under Factoring Arrangement |  |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |  |
Trade accounts receivable, net |  |  | 15,000 |  | 15,000 |  |  | 13,300 |  |
PNC |  |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |  |
AR facility term |  | 3 years |  |  |  |  |  |  |  |
Accounts receivable securitization, maximum purchase commitment |  |  |  |  |  |  | $ 160,000 | 150,000 |  |
Total outstanding trade receivables sold and derecognized |  |  | 160,000 |  | 160,000 |  |  | 150,000 |  |
Accounts receivable from securitization |  |  | $ 59,800 |  | 59,800 |  |  | $ 63,800 |  |
Additional proceeds |  |  |  |  | $ 10,000 | $ 0 |  |  |  |

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