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Fair Value Measurements (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Financial Assets:
Marketable Securities:	$ 4,073,531	$ 2,942,076
Corporate debt securities
Financial Assets:
Marketable Securities:	2,583,393	1,896,041
U.S. government treasury securities
Financial Assets:
Marketable Securities:	695,894	466,460
Commercial paper
Financial Assets:
Marketable Securities:	599,967	390,283
Certificates of deposit
Financial Assets:
Marketable Securities:	192,784	187,802
U.S. government agency securities
Financial Assets:
Marketable Securities:	1,493	1,490
Fair Value, Recurring
Financial Assets:
Total financial assets	4,416,040	4,147,593
Fair Value, Recurring | Corporate debt securities
Financial Assets:
Marketable Securities:	2,583,393	1,896,041
Fair Value, Recurring | U.S. government treasury securities
Financial Assets:
Marketable Securities:	695,894	466,460
Fair Value, Recurring | Commercial paper
Financial Assets:
Marketable Securities:	599,967	390,283
Fair Value, Recurring | Certificates of deposit
Financial Assets:
Marketable Securities:	192,784	187,802
Fair Value, Recurring | U.S. government agency securities
Financial Assets:
Marketable Securities:	1,493	1,490
Fair Value, Recurring | Money market funds
Financial Assets:
Cash equivalents:	311,106	1,193,927
Fair Value, Recurring | Commercial paper
Financial Assets:
Cash equivalents:	29,879	9,088
Fair Value, Recurring | Corporate debt securities
Financial Assets:
Cash equivalents:	1,524	2,502
Fair Value, Recurring | Level 1
Financial Assets:
Total financial assets	311,106	1,193,927
Fair Value, Recurring | Level 1 | Corporate debt securities
Financial Assets:
Marketable Securities:	0	0
Fair Value, Recurring | Level 1 | U.S. government treasury securities
Financial Assets:
Marketable Securities:	0	0
Fair Value, Recurring | Level 1 | Commercial paper
Financial Assets:
Marketable Securities:	0	0
Fair Value, Recurring | Level 1 | Certificates of deposit
Financial Assets:
Marketable Securities:	0	0
Fair Value, Recurring | Level 1 | U.S. government agency securities
Financial Assets:
Marketable Securities:	0	0
Fair Value, Recurring | Level 1 | Money market funds
Financial Assets:
Cash equivalents:	311,106	1,193,927
Fair Value, Recurring | Level 1 | Commercial paper
Financial Assets:
Cash equivalents:	0	0
Fair Value, Recurring | Level 1 | Corporate debt securities
Financial Assets:
Cash equivalents:	0	0
Fair Value, Recurring | Level 2
Financial Assets:
Total financial assets	4,104,934	2,953,666
Fair Value, Recurring | Level 2 | Corporate debt securities
Financial Assets:
Marketable Securities:	2,583,393	1,896,041
Fair Value, Recurring | Level 2 | U.S. government treasury securities
Financial Assets:
Marketable Securities:	695,894	466,460
Fair Value, Recurring | Level 2 | Commercial paper
Financial Assets:
Marketable Securities:	599,967	390,283
Fair Value, Recurring | Level 2 | Certificates of deposit
Financial Assets:
Marketable Securities:	192,784	187,802
Fair Value, Recurring | Level 2 | U.S. government agency securities
Financial Assets:
Marketable Securities:	1,493	1,490
Fair Value, Recurring | Level 2 | Money market funds
Financial Assets:
Cash equivalents:	0	0
Fair Value, Recurring | Level 2 | Commercial paper
Financial Assets:
Cash equivalents:	29,879	9,088
Fair Value, Recurring | Level 2 | Corporate debt securities
Financial Assets:
Cash equivalents:	1,524	2,502
Fair Value, Recurring | Level 3
Financial Assets:
Total financial assets	0	0
Fair Value, Recurring | Level 3 | Corporate debt securities
Financial Assets:
Marketable Securities:	0	0
Fair Value, Recurring | Level 3 | U.S. government treasury securities
Financial Assets:
Marketable Securities:	0	0
Fair Value, Recurring | Level 3 | Commercial paper
Financial Assets:
Marketable Securities:	0	0
Fair Value, Recurring | Level 3 | Certificates of deposit
Financial Assets:
Marketable Securities:	0	0
Fair Value, Recurring | Level 3 | U.S. government agency securities
Financial Assets:
Marketable Securities:	0	0
Fair Value, Recurring | Level 3 | Money market funds
Financial Assets:
Cash equivalents:	0	0
Fair Value, Recurring | Level 3 | Commercial paper
Financial Assets:
Cash equivalents:	0	0
Fair Value, Recurring | Level 3 | Corporate debt securities
Financial Assets:
Cash equivalents:	$ 0	$ 0

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