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Convertible Senior Notes - Additional Information (Detail) $ / shares in Units, $ in Thousands |  | 1 Months Ended | 3 Months Ended
--- | --- | --- | ---
Apr. 01, 2021 | Feb. 28, 2021 USD ($) d $ / shares | Dec. 31, 2020 USD ($) d $ / shares | Mar. 31, 2021 USD ($) d shares | Mar. 31, 2020 USD ($)
Debt Instrument [Line Items] |  |  |  |  |
Aggregate principal amount | $ |  |  |  | $ 1,700,000 |
Proceeds from convertible senior notes | $ |  |  |  | 1,050,000 | $ 0
Convertible Senior Notes due 2025 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Aggregate principal amount | $ |  |  | $ 650,000 | $ 650,000 |
Interest rate, fixed percentage |  |  | 0.75% |  |
Periodic payment description |  |  | The 2025 Notes are senior unsecured obligations of the Company and bear interest at a fixed rate of 0.750% per annum, payable semiannually in arrears on June 15 and December 15 of each year, beginning on June 15, 2021. |  |
Payment start date |  |  | Jun. 15, 2021 |  |
Debt instrument, maturity date |  |  | Dec. 15, 2025 |  |
Proceeds from convertible senior notes | $ |  |  | $ 634,700 |  |
Customary offering expense | $ |  |  | $ 15,300 |  |
Effective interest rate percentage |  |  | 1.23% |  |
Convertible Senior Notes due 2025 | Fundamental Change |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt instrument, redemption price, percentage of principal amount redeemed |  |  | 100.00% |  |
Convertible Senior Notes due 2025 | Events of Default |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Percentage of principal accrued and unpaid interest |  |  | 100.00% |  |
Convertible Senior Notes due 2025 | Minimum | Events of Default |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt instrument, redemption price, percentage of principal amount redeemed |  |  | 25.00% |  |
Convertible Senior Notes due 2025 | Class A Common Stock |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Initial conversion rate |  |  | 2.5126 |  |
Price per share | $ / shares |  |  | $ 1,000 |  |
Initial conversion price | $ / shares |  |  | $ 397.99 |  |
Number of shares convertible from notes | shares |  |  |  | 1,633,190 |
Debt instrument, convertible, trading days |  |  |  | 20 |
Debt instrument, convertible, consecutive trading days |  |  |  | 30 |
Convertible Senior Notes due 2025 | Class A Common Stock | Early Conversion by Noteholders before June 15, 2025 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt instrument, convertible, trading days |  |  | 20 |  |
Debt instrument, convertible, consecutive trading days |  |  | 30 |  |
Convertible Senior Notes due 2025 | Class A Common Stock | Early Conversion by Noteholders before June 15, 2025 | Subsequent Event |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt instrument, convertible, earliest date | Apr. 01, 2021 |  |  |  |
Convertible Senior Notes due 2025 | Class A Common Stock | Early Conversion by Noteholders before June 15, 2025 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt instrument, convertible, trading days |  |  | 5 |  |
Debt instrument, convertible, consecutive trading days |  |  | 5 |  |
Trading price per share | $ / shares |  |  | $ 1,000 |  |
Convertible Senior Notes due 2025 | Class A Common Stock | Redeemable by Company after December 20, 2023 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt instrument, convertible, earliest date |  |  | Dec. 20, 2023 |  |
Debt instrument, convertible, trading days |  |  | 20 |  |
Debt instrument, convertible, consecutive trading days |  |  | 30 |  |
Debt instrument, redemption price, percentage of principal amount redeemed |  |  | 100.00% |  |
Convertible Senior Notes due 2025 | Class A Common Stock | Minimum |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Conversion price percentage applicable trading days |  |  |  | 130.00% |
Convertible Senior Notes due 2025 | Class A Common Stock | Minimum | Early Conversion by Noteholders before June 15, 2025 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Conversion price percentage applicable trading days |  |  | 130.00% |  |
Convertible Senior Notes due 2025 | Class A Common Stock | Minimum | Redeemable by Company after December 20, 2023 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Conversion price percentage applicable trading days |  |  | 130.00% |  |
Convertible Senior Notes due 2025 | Class A Common Stock | Maximum [Member] | Early Conversion by Noteholders before June 15, 2025 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Conversion price percentage applicable trading days |  |  | 98.00% |  |
Convertible Senior Notes due 2027 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Aggregate principal amount | $ |  | $ 1,050,000 |  | $ 1,050,000 |
Interest rate, fixed percentage |  | 0.00% |  |  |
Periodic payment description |  | The 2027 Notes are senior unsecured obligations of the Company and do not bear regular interest. However, holders of the 2027 Notes may receive special interest under specified circumstances as outlined in the indenture relating to the issuance of the 2027 Notes (the “2027 Notes Indenture”). Any special interest is payable semiannually in arrears on February 15 and August 15 of each year, beginning on August 15, 2021 |  |  |
Payment start date |  | Aug. 15, 2021 |  |  |
Debt instrument, maturity date |  | Feb. 15, 2027 |  |  |
Proceeds from convertible senior notes | $ |  |  |  | 1,026,000 |
Customary offering expense | $ |  |  |  | $ 24,200 |
Effective interest rate percentage |  |  |  | 0.39% |
Convertible Senior Notes due 2027 | Fundamental Change |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt instrument, redemption price, percentage of principal amount redeemed |  |  | 100.00% |  |
Convertible Senior Notes due 2027 | Events of Default |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Percentage of principal accrued and unpaid interest |  | 100.00% |  |  |
Convertible Senior Notes due 2027 | Minimum | Events of Default |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt instrument, redemption price, percentage of principal amount redeemed |  | 25.00% |  |  |
Convertible Senior Notes due 2027 | Class A Common Stock |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Initial conversion rate |  | 0.6981 |  |  |
Price per share | $ / shares |  | $ 1,000 |  |  |
Initial conversion price | $ / shares |  | $ 1,432.46 |  |  |
Number of shares convertible from notes | shares |  |  |  | 733,005 |
Convertible Senior Notes due 2027 | Class A Common Stock | Early Conversion by Noteholders before August 15, 2026 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt instrument, convertible, earliest date |  | Jul. 01, 2021 |  |  |
Debt instrument, convertible, trading days |  | 5 |  |  |
Debt instrument, convertible, consecutive trading days |  | 5 |  |  |
Trading price per share | $ / shares |  | $ 1,000 |  |  |
Convertible Senior Notes due 2027 | Class A Common Stock | Redeemable by Company after February 20, 2024 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt instrument, convertible, earliest date |  | Feb. 20, 2024 |  |  |
Debt instrument, convertible, trading days |  | 20 |  |  |
Debt instrument, convertible, consecutive trading days |  | 30 |  |  |
Debt instrument, redemption price, percentage of principal amount redeemed |  | 100.00% |  |  |
Convertible Senior Notes due 2027 | Class A Common Stock | Minimum | Redeemable by Company after February 20, 2024 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Conversion price percentage applicable trading days |  | 130.00% |  |  |
Convertible Senior Notes due 2027 | Class A Common Stock | Maximum [Member] | Early Conversion by Noteholders before August 15, 2026 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Conversion price percentage applicable trading days |  | 98.00% |  |  |

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