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Accounts Receivable (Details) - USD ($) | 3 Months Ended |  |
--- | --- | --- | ---
Jun. 30, 2021 | Dec. 31, 2020 | Jan. 01, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Trade accounts receivable | $ 433,667,000 | $ 414,891,000 |
Accounts Receivable Greater than 12 Months Reserved | 6,000,000.0 |  |
Receivable with Imputed Interest, Face Amount | $ 40,000,000.0 |  |
Note Receivable; Interest Rate; Stated percentage | 2.50% |  |
Receivables, Fair Value Disclosure | $ 31,500,000 |  | $ 34,300,000
Proceeds from Collection of Notes Receivable | 6,400,000 |  |
Greater than 12 months |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Trade accounts receivable | $ 11,500,000 |  |
Harsco Industrial IKG | Disposal Group, Disposed of by Sale, Not Discontinued Operations |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Selling price |  |  | $ 85,000,000.0

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