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v3.21.2

Unaudited Consolidated Statements of Cash Flows (Parenthetical) | Sep. 30, 2021 | Mar. 19, 2021
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1.5% Convertible Unsecured Senior Notes |  |
Stated interest rate | 1.50% |
4.75% Convertible Senior Notes |  |
Stated interest rate | 4.75% | 4.75%

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