v3.21.2

Convertible Senior Notes - 0.75% Convertible Notes due 2026 Narrative (Details) - Convertible Senior Notes Due June 2026 | 1 Months Ended | 3 Months Ended | 9 Months Ended
--- | --- | --- | ---
Jun. 30, 2019 USD ($) day | Sep. 30, 2019 day | Sep. 30, 2021 $ / shares
Debt Instrument [Line Items] |  |  |
Remaining amortization period for debt discount and debt issuance costs |  |  | 4 years 8 months 12 days
Convertible Debt |  |  |
Debt Instrument [Line Items] |  |  |
Interest rate | 0.75% |  |
Principal amount | $ 316,300,000 |  |
Initial conversion rate of common stock |  |  | 0.0112851
Conversion price (usd per share) | $ / shares |  |  | $ 88.61
Threshold percentage of stock price trigger | 130.00% | 130.00% |
Limitation on sale of common stock, sale price threshold, number of trading days | day | 20 | 20 |
Limitation on sale of common stock, sale price threshold, trading period | day | 30 | 30 |
Number of consecutive business days | 5 days |  |
Percentage of closing sale price in excess of convertible notes | 98.00% |  |
Redemption price percentage | 100.00% |  |
Effective interest rate of liability component | 5.38% |  |
Issuance costs attributable to the liability component | $ 6,400,000 |  |
Net issuance costs related to the equity component | $ 2,900,000 |  |

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