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Fair Value Measurements - Schedule of Fair Value of Financial Assets (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022
Assets, Fair Value Disclosure [Abstract] |  |
Cash Equivalents: | $ 1,017,704 | $ 397,261
Marketable Securities: | 3,064,362 | 2,322,469
Total Financial Assets | 4,087,924 | 2,753,554
Debt Securities, Available-for-Sale, Fair Value to Amortized Cost, after Allowance for Credit Loss [Abstract] |  |
Amortized Cost | 3,061,695 | 2,350,988
Unrealized Gains | 6,827 | 357
Unrealized Losses | (4,160) | (28,876)
Fair Value | 3,064,362 | 2,322,469
Certificates of deposits |  |
Assets, Fair Value Disclosure [Abstract] |  |
Marketable Securities: | 5,000 | 10,492
Debt Securities, Available-for-Sale, Fair Value to Amortized Cost, after Allowance for Credit Loss [Abstract] |  |
Fair Value | 5,000 | 10,492
U.S. government notes |  |
Assets, Fair Value Disclosure [Abstract] |  |
Marketable Securities: | 1,044,859 | 993,955
Debt Securities, Available-for-Sale, Fair Value to Amortized Cost, after Allowance for Credit Loss [Abstract] |  |
Amortized Cost | 1,043,445 | 1,007,175
Unrealized Gains | 2,874 | 3
Unrealized Losses | (1,460) | (13,223)
Fair Value | 1,044,859 | 993,955
Corporate bonds |  |
Assets, Fair Value Disclosure [Abstract] |  |
Marketable Securities: | 1,362,124 | 1,113,134
Debt Securities, Available-for-Sale, Fair Value to Amortized Cost, after Allowance for Credit Loss [Abstract] |  |
Amortized Cost | 1,361,132 | 1,125,920
Unrealized Gains | 2,810 | 271
Unrealized Losses | (1,818) | (13,057)
Fair Value | 1,362,124 | 1,113,134
Agency securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Marketable Securities: | 657,379 | 215,380
Debt Securities, Available-for-Sale, Fair Value to Amortized Cost, after Allowance for Credit Loss [Abstract] |  |
Amortized Cost | 657,118 | 217,893
Unrealized Gains | 1,143 | 83
Unrealized Losses | (882) | (2,596)
Fair Value | 657,379 | 215,380
Marketable equity securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Marketable equity securities | 0 | 19,061
Proceeds from sale of marketable equity securities | 23,900 |
Equity securities, realized gain | 4,800 | 10,700
Initial cost for equity investment | 3,000 |
Cumulative gain from initial purchase of equity investment | 20,900 |
Marketable securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Marketable Securities | 3,069,362 | 2,352,022
Money market funds - restricted |  |
Assets, Fair Value Disclosure [Abstract] |  |
Money market funds - restricted | 858 | 4,271
Level I |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash Equivalents: | 1,015,705 | 374,280
Total Financial Assets | 2,061,422 | 1,391,567
Level I | Certificates of deposits |  |
Assets, Fair Value Disclosure [Abstract] |  |
Marketable Securities: | 0 | 0
Debt Securities, Available-for-Sale, Fair Value to Amortized Cost, after Allowance for Credit Loss [Abstract] |  |
Fair Value | 0 | 0
Level I | U.S. government notes |  |
Assets, Fair Value Disclosure [Abstract] |  |
Marketable Securities: | 1,044,859 | 993,955
Debt Securities, Available-for-Sale, Fair Value to Amortized Cost, after Allowance for Credit Loss [Abstract] |  |
Fair Value | 1,044,859 | 993,955
Level I | Corporate bonds |  |
Assets, Fair Value Disclosure [Abstract] |  |
Marketable Securities: | 0 | 0
Debt Securities, Available-for-Sale, Fair Value to Amortized Cost, after Allowance for Credit Loss [Abstract] |  |
Fair Value | 0 | 0
Level I | Agency securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Marketable Securities: | 0 | 0
Debt Securities, Available-for-Sale, Fair Value to Amortized Cost, after Allowance for Credit Loss [Abstract] |  |
Fair Value | 0 | 0
Level I | Marketable equity securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Marketable equity securities | 0 | 19,061
Level I | Marketable securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Marketable Securities | 1,044,859 | 1,013,016
Level I | Money market funds - restricted |  |
Assets, Fair Value Disclosure [Abstract] |  |
Money market funds - restricted | 858 | 4,271
Level II |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash Equivalents: | 1,999 | 22,981
Total Financial Assets | 2,026,502 | 1,361,987
Level II | Certificates of deposits |  |
Assets, Fair Value Disclosure [Abstract] |  |
Marketable Securities: | 5,000 | 10,492
Debt Securities, Available-for-Sale, Fair Value to Amortized Cost, after Allowance for Credit Loss [Abstract] |  |
Fair Value | 5,000 | 10,492
Level II | U.S. government notes |  |
Assets, Fair Value Disclosure [Abstract] |  |
Marketable Securities: | 0 | 0
Debt Securities, Available-for-Sale, Fair Value to Amortized Cost, after Allowance for Credit Loss [Abstract] |  |
Fair Value | 0 | 0
Level II | Corporate bonds |  |
Assets, Fair Value Disclosure [Abstract] |  |
Marketable Securities: | 1,362,124 | 1,113,134
Debt Securities, Available-for-Sale, Fair Value to Amortized Cost, after Allowance for Credit Loss [Abstract] |  |
Fair Value | 1,362,124 | 1,113,134
Level II | Agency securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Marketable Securities: | 657,379 | 215,380
Debt Securities, Available-for-Sale, Fair Value to Amortized Cost, after Allowance for Credit Loss [Abstract] |  |
Fair Value | 657,379 | 215,380
Level II | Marketable equity securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Marketable equity securities | 0 | 0
Level II | Marketable securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Marketable Securities | 2,024,503 | 1,339,006
Level II | Money market funds - restricted |  |
Assets, Fair Value Disclosure [Abstract] |  |
Money market funds - restricted | 0 | 0
Level III |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash Equivalents: | 0 | 0
Total Financial Assets | 0 | 0
Level III | Certificates of deposits |  |
Assets, Fair Value Disclosure [Abstract] |  |
Marketable Securities: | 0 | 0
Debt Securities, Available-for-Sale, Fair Value to Amortized Cost, after Allowance for Credit Loss [Abstract] |  |
Fair Value | 0 | 0
Level III | U.S. government notes |  |
Assets, Fair Value Disclosure [Abstract] |  |
Marketable Securities: | 0 | 0
Debt Securities, Available-for-Sale, Fair Value to Amortized Cost, after Allowance for Credit Loss [Abstract] |  |
Fair Value | 0 | 0
Level III | Corporate bonds |  |
Assets, Fair Value Disclosure [Abstract] |  |
Marketable Securities: | 0 | 0
Debt Securities, Available-for-Sale, Fair Value to Amortized Cost, after Allowance for Credit Loss [Abstract] |  |
Fair Value | 0 | 0
Level III | Agency securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Marketable Securities: | 0 | 0
Debt Securities, Available-for-Sale, Fair Value to Amortized Cost, after Allowance for Credit Loss [Abstract] |  |
Fair Value | 0 | 0
Level III | Marketable equity securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Marketable equity securities | 0 | 0
Level III | Marketable securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Marketable Securities | 0 | 0
Level III | Money market funds - restricted |  |
Assets, Fair Value Disclosure [Abstract] |  |
Money market funds - restricted | 0 | 0
Money market funds |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash Equivalents: | 1,015,705 | 322,294
Money market funds | Level I |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash Equivalents: | 1,015,705 | 322,294
Money market funds | Level II |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash Equivalents: | 0 | 0
Money market funds | Level III |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash Equivalents: | 0 | 0
Commercial paper |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash Equivalents: | 1,999 | 5,422
Commercial paper | Level I |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash Equivalents: | 0 | 0
Commercial paper | Level II |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash Equivalents: | 1,999 | 5,422
Commercial paper | Level III |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash Equivalents: | 0 | 0
Agency securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash Equivalents: | 0 | 17,559
Agency securities | Level I |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash Equivalents: | 0 | 0
Agency securities | Level II |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash Equivalents: | 0 | 17,559
Agency securities | Level III |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash Equivalents: | 0 | 0
U.S. government notes |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash Equivalents: | 0 | 51,986
U.S. government notes | Level I |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash Equivalents: | 0 | 51,986
U.S. government notes | Level II |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash Equivalents: | 0 | 0
U.S. government notes | Level III |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash Equivalents: | $ 0 | $ 0

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- Definition Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-2 + Details
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- Definition Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References No definition available. + Details
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