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Convertible Senior Notes - Additional Information (Detail) |  |  | 1 Months Ended | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Jul. 22, 2019 USD ($) shares | Jul. 19, 2019 USD ($) $ / shares | Sep. 23, 2019 USD ($) shares | Dec. 31, 2021 USD ($) | Dec. 31, 2021 USD ($) d | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | Jul. 16, 2019 USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Proceeds from issuance of convertible senior notes, net of costs |  |  |  |  |  |  | $ 278,466,000 |
Notes threshold percentage of stock price trigger |  |  |  | 130.00% |  |  |  |
Notes threshold trading days | d |  |  |  |  | 20 |  |  |
Debt instrument amount convertible into equity |  |  |  | $ 2,000,000 | $ 2,000,000 |  |  |
Notes threshold consecutive trading days | d |  |  |  |  | 30 |  |  |
Amortization of debt discount and issuance costs |  |  |  |  | $ 11,530,000 | $ 10,970,000 | 7,536,000 |
Total consideration on conversion |  |  |  |  |  |  | 198,757,000 |
Loss on extinguishment of debt |  |  |  |  | (13,000) |  | $ (5,650,000) |
0.375% Convertible Senior Notes due 2024 |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Notes due date |  |  |  | $ 287,500,000 | $ 287,500,000 |  |  |
Notes, interest rate |  |  |  | 0.375% | 0.375% |  |  |
Proceeds from issuance of convertible senior notes, net of costs |  | $ 278,500,000 |  |  |  |  |  |
Interest repayment terms |  |  |  |  | Interest is payable semi-annually in arrears on January 15 and July 15 of each year, beginning on January 15, 2020 |  |  |
Notes, due date |  |  |  |  | Jul. 15, 2024 |  |  |
Debt instrument amount convertible into equity |  |  |  | $ 11,000,000 | $ 11,000,000 |  |  |
Notes conversion ratio per $1,000 principal amount |  | 8,674.9000 |  |  |  |  |  |
Notes initial conversion price | $ / shares |  | $ 115.28 |  |  |  |  |  |
Notes redemption price |  | 100.00% |  |  |  |  |  |
Contractual coupon interest |  |  |  |  | 1,100,000 |  |  |
Amortization of debt discount and issuance costs |  |  |  |  | 10,100,000 |  |  |
Amortization of the debt issuance costs |  |  |  |  | $ 1,400 |  |  |
Effective interest rate on the Notes |  |  |  | 5.10% | 5.10% |  |  |
Notes, carrying value |  |  |  | $ 255,300,000 | $ 255,300,000 |  |  |
Fair value of the note |  |  |  | 678,500,000 | 678,500,000 |  |  |
Additional Notes issued |  |  |  | 37,500,000 | 37,500,000 |  |  |
Discount rate |  |  |  |  |  |  | 4.50% |
Proceeds allocated to the conversion feature |  |  |  |  |  |  | $ 52,100 |
Transaction costs attributable to liability component |  |  |  |  | 7,400,000 |  |  |
Transaction costs attributable to equity component |  |  |  | 1,600 | $ 1,600 |  |  |
Loss On Debt Conversion |  |  |  | $ 13,000,000 |  |  |  |
2.125% Convertible Senior Notes due 2021 |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Notes due date |  |  |  |  |  |  |  | $ 92,000,000.0
Notes, interest rate |  |  |  | 2.125% | 2.125% |  |  |
Repayment Of Senior Debt |  | $ 92,300,000 | $ 23,000.0 |  |  |  |  |
Accrued interest |  | $ 300,000 |  |  |  |  |  |
Total consideration on conversion | $ 253,300 |  |  |  |  |  |  |
Face amount of remaining convertible debt |  |  | 60,800,000 |  |  |  |  |
Equity component of converted debt | $ 163,600 |  | 38,300,000 |  |  |  |  |
Loss on extinguishment of debt |  |  | $ (1,100,000) |  |  |  | $ (4,600,000) |
2.125% Convertible Senior Notes due 2021 | Common Stock [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Conversion of Convertible Securities Stock Issued | shares | shares | 1,850,155 |  | 466,045 |  |  |  |  |
Conversion of Convertible Securities Stock Issued | value | $ 161,000,000.0 |  | $ 37,800,000 |  |  |  |  |

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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=123466204&loc=SL6031897-161870 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 55 -Paragraph 69C -URI http://asc.fasb.org/extlink&oid=123466577&loc=SL123495737-112612 Reference 3: 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 4: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 55 -Paragraph 69B -URI http://asc.fasb.org/extlink&oid=123466577&loc=SL123495735-112612 Reference 5: 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 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1D -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123466505&loc=SL123495340-112611 Reference 7: 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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