Fair Value Measurements, Cash Equivalents and Marketable Securities - Measured on Recurring Basis (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Financial Assets:
Cash equivalents	$ 613,039	$ 1,032,500
Short-term marketable debt securities	310,701	35,097
Short-term marketable equity securities	31,280
Long-term marketable equity securities		98,002
Total financial assets	955,020	1,165,599
Financial Liabilities:
Contingent consideration	7,300	6,540
Total financial liabilities	7,300	6,540
Level 1
Financial Assets:
Cash equivalents	112,142	1,032,500
Short-term marketable debt securities	0	0
Short-term marketable equity securities	31,280
Long-term marketable equity securities		98,002
Total financial assets	143,422	1,130,502
Financial Liabilities:
Contingent consideration	0	0
Total financial liabilities	0	0
Level 2
Financial Assets:
Cash equivalents	500,897	0
Short-term marketable debt securities	310,701	35,097
Short-term marketable equity securities	0
Long-term marketable equity securities		0
Total financial assets	811,598	35,097
Financial Liabilities:
Contingent consideration	0	0
Total financial liabilities	0	0
Level 3
Financial Assets:
Cash equivalents	0	0
Short-term marketable debt securities	0	0
Short-term marketable equity securities	0
Long-term marketable equity securities		0
Total financial assets	0	0
Financial Liabilities:
Contingent consideration	7,300	6,540
Total financial liabilities	7,300	6,540
U.S. government debt securities
Financial Assets:
Short-term marketable debt securities	310,701	35,097
U.S. government debt securities | Level 1
Financial Assets:
Short-term marketable debt securities	0	0
U.S. government debt securities | Level 2
Financial Assets:
Short-term marketable debt securities	310,701	35,097
U.S. government debt securities | Level 3
Financial Assets:
Short-term marketable debt securities	0	0
Money market funds
Financial Assets:
Cash equivalents	112,142	1,032,500
Money market funds | Level 1
Financial Assets:
Cash equivalents	112,142	1,032,500
Money market funds | Level 2
Financial Assets:
Cash equivalents	0	0
Money market funds | Level 3
Financial Assets:
Cash equivalents	0	$ 0
Income deposit funds
Financial Assets:
Cash equivalents	102,412
Income deposit funds | Level 1
Financial Assets:
Cash equivalents	0
Income deposit funds | Level 2
Financial Assets:
Cash equivalents	102,412
Income deposit funds | Level 3
Financial Assets:
Cash equivalents	0
U.S. government debt securities
Financial Assets:
Cash equivalents	398,485
U.S. government debt securities | Level 1
Financial Assets:
Cash equivalents	0
U.S. government debt securities | Level 2
Financial Assets:
Cash equivalents	398,485
U.S. government debt securities | Level 3
Financial Assets:
Cash equivalents	$ 0