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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%