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v3.21.1

Debt - Narrative (Details) |  | 1 Months Ended | 3 Months Ended |  |
--- | --- | --- | --- | --- | ---
Jan. 01, 2021 USD ($) | Sep. 30, 2019 USD ($) D $ / shares | Aug. 31, 2015 USD ($) D $ / shares | Mar. 31, 2021 USD ($) | Mar. 31, 2020 USD ($) | Dec. 31, 2020 USD ($) | Jan. 31, 2020 $ / shares
Long-term debt |  |  |  |  |  |  |
Long-term debt |  |  |  | $ 430,038,000 |  | $ 309,145,000 |
Conversion price per share (in dollars per share) | $ / shares |  |  |  |  |  |  | $ 6.00
Additional paid-in capital |  |  |  | 2,033,972,000 |  | 2,171,746,000 |
1.50% Convertible senior notes due 2026 |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  |  |
Term of the convertible notes | 7 years |  |  |  |  |  |
Debt discount to be amortized | $ 0 |  |  |  |  |  |
3.00% Convertible senior notes due 2022 |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  |  |
Term of the convertible notes | 7 years |  |  |  |  |  |
Debt discount to be amortized | $ 0 |  |  |  |  |  |
Convertible debt | 1.50% Convertible senior notes due 2026 |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  |  |
Net carrying amount |  |  |  | 281,043,000 |  | 177,377,000 |
Debt principal amount |  | $ 287,500,000 |  | $ 287,500,000 |  | 287,500,000 |
Debt instrument additional amount available for repurchase |  | $ 37,500,000 |  |  |  |  |
Interest rate ( as a percent ) |  | 1.50% |  | 1.50% |  |  |
Net proceeds from issuance of convertible notes |  | $ 279,300,000 |  |  |  |  |
Trading days, number | D |  | 20 |  |  |  |  |
Consecutive trading days, period | D |  | 30 |  |  |  |  |
Stock price trigger |  | 130.00% |  |  |  |  |
Business days, period |  | 5 days |  |  |  |  |
Consecutive trading-day period |  | 5 days |  |  |  |  |
Maximum product of the closing sale price of shares of the Company's common stock and the applicable conversion rate for such trading day |  | 98.00% |  |  |  |  |
Conversion ratio |  | 19.0404 |  |  |  |  |
Conversion price per share (in dollars per share) | $ / shares |  | $ 52.52 |  |  |  |  |
Convertible instruments principal and unpaid interest payable upon events of default |  | 100.00% |  |  |  |  |
Minimum percentage of principal held by convertible debt instrument holders required to issue notice for declaration of principal and unpaid interest payable upon events of default |  | 25.00% |  |  |  |  |
Term of the convertible notes |  | 7 years | 7 years | 5 years 6 months |  |  |
Equity component of convertible notes, net |  | $ 123,000,000.0 |  |  |  |  |
Amortization of debt discount |  |  |  |  | $ 3,234,000 |  |
Debt discount to be amortized |  |  |  |  |  | 106,065,000 |
Net deferred tax liability in connection with convertible notes |  |  |  | $ 25,300,000 |  |  |
Fair value of convertible notes |  |  |  | 333,800,000 |  | 394,900,000 |
Convertible debt | 1.50% Convertible senior notes due 2026 | Redemption on or after September 20, 2023 |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  |  |
Trading days, number | D |  | 19 |  |  |  |  |
Consecutive trading days, period | D |  | 30 |  |  |  |  |
Stock price trigger |  | 130.00% |  |  |  |  |
Redemption price as percent of principal amount |  | 100.00% |  |  |  |  |
Sinking fund |  | $ 0 |  |  |  |  |
Convertible debt | 3.00% Convertible senior notes due 2022 |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  |  |
Net carrying amount |  |  |  | 148,995,000 |  | 131,763,000 |
Debt principal amount |  |  | $ 150,000,000.0 | 150,000,000 |  | 150,000,000 |
Interest rate ( as a percent ) |  |  | 3.00% |  |  |  |
Net proceeds from issuance of convertible notes |  |  | $ 145,400,000 |  |  |  |
Trading days, number | D |  |  | 20 |  |  |  |
Stock price trigger |  |  | 130.00% |  |  |  |
Business days, period |  |  | 5 days |  |  |  |
Consecutive trading-day period |  |  | 5 days |  |  |  |
Maximum product of the closing sale price of shares of the Company's common stock and the applicable conversion rate for such trading day |  |  | 98.00% |  |  |  |
Conversion ratio |  |  | 17.7487 |  |  |  |
Conversion price per share (in dollars per share) | $ / shares |  |  | $ 56.34 |  |  |  |
Convertible instruments principal and unpaid interest payable upon events of default |  |  | 100.00% |  |  |  |
Minimum percentage of principal held by convertible debt instrument holders required to issue notice for declaration of principal and unpaid interest payable upon events of default |  |  | 25.00% |  |  |  |
Term of the convertible notes |  |  | 7 years |  |  |  |
Equity component of convertible notes, net |  |  | $ 57,500,000 |  |  |  |
Amortization of debt discount |  |  |  |  | $ 2,225,000 |  |
Debt discount to be amortized |  |  |  |  |  | 17,372,000 |
Net deferred tax liability in connection with convertible notes |  |  | $ 22,300,000 |  |  |  |
Fair value of convertible notes |  |  |  | $ 173,400,000 |  | 193,200,000 |
Remaining contractual life of the convertible notes |  |  |  | 1 year 4 months 24 days |  |  |
Convertible debt | 3.00% Convertible senior notes due 2022 | Redemption on or after August 20, 2018 |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  |  |
Trading days, number | D |  |  | 19 |  |  |  |
Consecutive trading days, period | D |  |  | 30 |  |  |  |
Stock price trigger |  |  | 130.00% |  |  |  |
Redemption price as percent of principal amount |  |  | 100.00% |  |  |  |
Sinking fund |  |  | $ 0 |  |  |  |
Cumulative Effect Adjustment |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  | $ 120,400,000 |
Cumulative Effect Adjustment | 1.50% Convertible senior notes due 2026 |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  |  |
Additional paid-in capital | (123,000,000.0) |  |  |  |  |  |
Amortization of debt discount | 16,100,000 |  |  |  |  |  |
Cumulative Effect Adjustment | 3.00% Convertible senior notes due 2022 |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  |  |
Additional paid-in capital | (57,500,000) |  |  |  |  |  |
Amortization of debt discount | $ 38,700,000 |  |  |  |  |  |

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