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v3.21.1

Convertible Senior Notes (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2020
3.75% Convertible Senior Notes |
Debt Instrument [Line Items] |
Schedule of net proceeds from the Convertible Senior Notes | ​
​ | ​ | ​
​ | Amount
​ | (in thousands)
Principal amount | $ | 212,463
Less initial purchasers' discount | ​ | (6,374)
Less cost of related capped calls | ​ | (16,253)
Less other issuance costs | ​ | (617)
Net proceeds | $ | 189,219

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