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Debt - Narrative (Details) |  |  |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | ---
Jul. 01, 2020 USD ($) | May 05, 2017 USD ($) | Aug. 31, 2015 USD ($) $ / shares | Sep. 30, 2019 USD ($) D | May 31, 2017 USD ($) | Aug. 31, 2015 USD ($) D $ / shares | Dec. 31, 2020 USD ($) $ / shares | Dec. 31, 2019 USD ($)
Long-term debt |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  |  | $ 309,145,000 | $ 293,859,000
Current portion of long-term debt |  |  |  |  |  |  |  | 20,000,000
Equity component of convertible notes, net |  |  |  |  |  |  |  | 119,482,000
Additional Paid in Capital |  |  |  |  |  |  | 2,171,746,000 | 1,795,351,000
Convertible debt | 1.50% Convertible senior notes due 2026 |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  |  |  |
Net carrying amount |  |  |  |  |  |  | 177,377,000 | 163,583,000
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% |  |  |  |
Net proceeds from issuance of convertible notes |  |  |  | $ 279,300,000 |  |  |  |
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 |  |  |  | 19.0404 |  |  |  |
Conversion price per share (in dollars per share) | $ / shares |  |  |  |  |  |  | $ 52.52 |
Sinking fund |  |  |  |  |  |  | $ 0 |
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 |  |  | 5 years 8 months 12 days |
Equity component of convertible notes, net |  |  |  | $ 123,000,000.0 |  |  |  |
Net deferred tax liability in connection with convertible notes |  |  |  |  |  |  | $ 25,300,000 |
Convertible debt | 1.50% Convertible senior notes due 2026 | Redemption on or after September 20, 2023 |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  |  |  |
Trading days, number | D |  |  |  | 19 |  |  |  |
Stock price trigger |  |  |  | 130.00% |  |  |  |
Redemption price as percent of principal amount |  |  |  | 100.00% |  |  |  |
Convertible debt | 3.00% Convertible senior notes due 2022 |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  |  |  |
Net carrying amount |  |  |  |  |  |  | 131,763,000 | 121,985,000
Debt principal amount |  |  | $ 150,000,000.0 |  |  | $ 150,000,000.0 | 150,000,000 | 150,000,000
Interest rate ( as a percent ) |  |  | 3.00% |  |  | 3.00% |  |
Net proceeds from issuance of convertible notes |  |  |  |  |  | $ 145,400,000 |  |
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% |  |  | 98.00% |  |
Conversion ratio |  |  |  |  |  | 17.7487 |  |
Conversion price per share (in dollars per share) | $ / shares |  |  | $ 56.34 |  |  | $ 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 |  |  | 7 years |  |
Net deferred tax liability in connection with convertible notes |  |  | $ 22,300,000 |  |  | $ 22,300,000 |  |
Additional Paid in Capital |  |  |  |  |  |  | $ 57,500,000 |
Remaining contractual life of the convertible notes |  |  |  |  |  |  | 1 year 7 months 6 days |
Convertible debt | 3.00% Convertible senior notes due 2022 | Redemption on or after September 20, 2023 |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  |  |  |
Consecutive trading days, period | D |  |  |  | 30 |  |  |  |
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 |
Convertible debt instruments redeemed |  |  |  |  |  |  | 0 |
MidCap Financial Trust |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  |  |  |
Line of credit facility, maximum borrowing capacity |  |  |  |  | $ 60,000,000.0 |  |  |
Proceeds from lines of credit |  | $ 40,000,000.0 |  |  |  |  |  |
Debt issuance costs |  |  |  |  | $ 400,000 |  |  |
Repayments of debt |  |  |  |  |  |  |  | 11,700,000
Net carrying amount |  |  |  |  |  |  |  | 28,300,000
Long-term debt |  |  |  |  |  |  |  | $ 20,000,000.0
Current portion of long-term debt |  |  |  |  |  |  | $ 8,300,000 |
Debt instrument, interest payment period |  |  |  |  | 24 months |  |  |
Repayments of line of credit | $ 18,300,000 |  |  |  |  |  |  |
Payment of accrued interest | 100,000 |  |  |  |  |  |  |
Aggregate repayment of line of credit and accrued interest | 18,400,000 |  |  |  |  |  |  |
Termination and exit fees | $ 600,000 |  |  |  |  |  |  |
MidCap Financial Trust | LIBOR |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  |  |  |
Debt instrument, floor interest rate |  |  |  |  | 1.00% |  |  |
Debt instrument, basis spread on variable rate |  |  |  |  | 6.15% |  |  |

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- Definition Threshold period of specified business days within which the maximum product of the closing sale price of shares of the entity's common stock and the applicable conversion rate for such trading day triggers the conversion feature. + References No definition available. + Details
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- Definition Excess of issue price over par or stated value of the entity's capital stock and amounts received from other transactions involving the entity's stock or stockholders. Includes adjustments to additional paid in capital. Some examples of such adjustments include recording the issuance of debt with a beneficial conversion feature and certain tax consequences of equity instruments awarded to employees. Use this element for the aggregate amount of additional paid-in capital associated with common and preferred stock. For additional paid-in capital associated with only common stock, use the element additional paid in capital, common stock. For additional paid-in capital associated with only preferred stock, use the element additional paid in capital, preferred stock. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 65 -Paragraph 15 -Subparagraph (g)(2) -URI http://asc.fasb.org/extlink&oid=121322162&loc=SL121327923-165333 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(30)(a)(1)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition Threshold period of specified consecutive trading days within which common stock price to conversion price of convertible debt instrument must exceed threshold percentage for specified number of trading days to trigger conversion feature. + References No definition available. + Details
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- Definition Threshold number of specified trading days that common stock price to conversion price of convertible debt instruments must exceed threshold percentage within a specified consecutive trading period to trigger conversion feature. + References No definition available. + Details
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- Definition Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Amount, before accumulated amortization, of debt issuance costs related to line of credit arrangements. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section S45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=68176171&loc=SL68176184-208336 + Details
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- Definition Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b)(3) -URI http://asc.fasb.org/extlink&oid=120520924&loc=SL6031897-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition The cash inflow from additional borrowings, net of cash paid to third parties in connection with debt origination. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3255-108585 + Details
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