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Stockholders' Equity - Securities Repurchase Program (Details) - USD ($) $ in Thousands |  | 1 Months Ended | 9 Months Ended
--- | --- | --- | ---
Nov. 01, 2021 | Mar. 31, 2021 | Sep. 30, 2021 | Sep. 30, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Repayments of convertible senior notes |  |  | $ 300,755 | $ 159,677
Remaining under repurchase program |  |  | 665,500 |
2025 Notes | Senior Notes |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Repurchased principal amount |  |  | 100,000 |
Repayments of convertible senior notes |  | $ 184,900 | $ 184,900 |
Subsequent Event |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Stock repurchase program, increase of authorized amount | $ 500,000 |  |  |
Stock repurchase program, authorized amount | $ 1,000,000 |  |  |

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- Definition Face (par) amount of the original debt instrument that was repurchased. + References No definition available. + Details
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- Definition The cash outflow from the repayment of a long-term debt instrument which can be exchanged for a specified amount of another security, typically the entity's common stock, at the option of the issuer or the holder. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3291-108585 + Details
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