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Debt (Schedule of Debt) (Details) - USD ($) $ in Thousands | Jun. 30, 2021 | Dec. 31, 2020 | Jun. 30, 2020
--- | --- | --- | ---
Debt Instrument [Line Items] |  |  |
Finance lease obligations and other borrowings | $ 24,633 | $ 25,390 |
Debt and finance lease obligations | 1,316,748 | 1,726,906 |
Less amounts due within one year | 9,599 | 8,995 |
Total debt due after one year | $ 1,307,149 | $ 1,717,911 | $ 1,373,124
2022 EUR Senior Notes |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate (as a percent) | 1.25% | 1.25% |
Debt instrument, unamortized discount (premium) and debt issuance costs, net |  | $ 1,070 |
Long-term debt | $ 0 | $ 410,243 |
2022 Senior notes |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate (as a percent) | 3.50% | 3.50% |
Debt instrument, unamortized discount (premium) and debt issuance costs, net | $ 882 | $ 1,235 |
Long-term debt | $ 499,118 | $ 498,765 |
2023 Senior notes |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate (as a percent) | 4.00% | 4.00% |
Debt instrument, unamortized discount (premium) and debt issuance costs, net | $ 1,122 | $ 1,345 |
Long-term debt | $ 298,878 | 298,655 |
2030 USD Senior notes |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate (as a percent) | 3.50% |  |
Debt instrument, unamortized discount (premium) and debt issuance costs, net | $ 5,881 | 6,147 |
Long-term debt | $ 494,119 | $ 493,853 |

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