Cash Equivalents and Investments - Schedule of Cash Equivalents and Short and Long-Term Investments (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2022	Dec. 31, 2023	Dec. 31, 2022
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost		$ 3,187,097
Gross Unrealized Gains		4,100
Gross Unrealized Losses		(4,006)
Fair Value		3,187,922
Cash Equivalents		629,715
Short-Term Investments		1,514,808
Long-Term Investments		1,043,399
Debt Securities
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost		3,187,097
Gross Unrealized Gains		4,100
Gross Unrealized Losses		(4,006)
Fair Value		3,187,191
Cash Equivalents		629,715
Short-Term Investments		1,514,077
Long-Term Investments		1,043,399
Fair Value, Inputs, Level 1 | Debt Securities
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost		2,307,588	$ 1,903,880
Gross Unrealized Gains	$ 0	2,007
Gross Unrealized Losses	0	(2,547)
Fair Value		2,307,048	1,903,880
Cash Equivalents		614,888	1,903,880
Short-Term Investments		1,155,218	0
Long-Term Investments		536,942	0
Fair Value, Inputs, Level 1 | Equity Securities
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost
Gross Unrealized Gains
Gross Unrealized Losses
Fair Value		731
Cash Equivalents		0
Short-Term Investments		731
Long-Term Investments		0
Fair Value, Inputs, Level 2 | Debt Securities
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost		879,509
Gross Unrealized Gains		2,093
Gross Unrealized Losses		(1,459)
Fair Value		880,143
Cash Equivalents		14,827
Short-Term Investments		358,859
Long-Term Investments		506,457
Money market funds | Fair Value, Inputs, Level 1 | Debt Securities
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost		614,888	1,903,880
Gross Unrealized Gains	0	0
Gross Unrealized Losses	$ 0	0
Fair Value		614,888	1,903,880
Cash Equivalents		614,888	1,903,880
Short-Term Investments		0	0
Long-Term Investments		0	$ 0
U.S. Treasury securities | Fair Value, Inputs, Level 1 | Debt Securities
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost		1,692,700
Gross Unrealized Gains		2,007
Gross Unrealized Losses		(2,547)
Fair Value		1,692,160
Cash Equivalents		0
Short-Term Investments		1,155,218
Long-Term Investments		536,942
U.S. agency securities | Fair Value, Inputs, Level 2 | Debt Securities
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost		286,007
Gross Unrealized Gains		27
Gross Unrealized Losses		(197)
Fair Value		285,837
Cash Equivalents		0
Short-Term Investments		137,151
Long-Term Investments		148,686
Foreign government securities | Fair Value, Inputs, Level 2 | Debt Securities
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost		12,866
Gross Unrealized Gains		74
Gross Unrealized Losses		(28)
Fair Value		12,912
Cash Equivalents		0
Short-Term Investments		1,489
Long-Term Investments		11,423
Commercial paper | Fair Value, Inputs, Level 2 | Debt Securities
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost		184,465
Gross Unrealized Gains		0
Gross Unrealized Losses		0
Fair Value		184,465
Cash Equivalents		14,827
Short-Term Investments		169,638
Long-Term Investments		0
Corporate debt securities | Fair Value, Inputs, Level 2 | Debt Securities
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost		396,171
Gross Unrealized Gains		1,992
Gross Unrealized Losses		(1,234)
Fair Value		396,929
Cash Equivalents		0
Short-Term Investments		50,581
Long-Term Investments		346,348
Mutual funds | Fair Value, Inputs, Level 1 | Equity Securities
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost
Gross Unrealized Gains
Gross Unrealized Losses
Fair Value		731
Cash Equivalents		0
Short-Term Investments		731
Long-Term Investments		$ 0