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Fair Value Measurements - Marketable Securities (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | $ 1,777,812 | $ 896,185
Gross unrealized gains | 8,891 | 0
Gross unrealized losses | (5,185) | (31,420)
Aggregate Fair Value | 1,781,518 | 864,765
Short-Term Marketable Securities | 372,014 | 562,308
Long-Term Marketable Securities | 1,409,504 | 302,457
Time deposits |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 14,426 | 19,530
Gross unrealized gains | 0 | 0
Gross unrealized losses | 0 | 0
Aggregate Fair Value | 14,426 | 19,530
Short-Term Marketable Securities | 14,426 | 19,530
Long-Term Marketable Securities | 0 | 0
Commercial paper |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 6,249 |
Gross unrealized gains | 0 |
Gross unrealized losses | (5) |
Aggregate Fair Value | 6,244 |
Short-Term Marketable Securities | 6,244 |
Long-Term Marketable Securities | 0 |
Corporate bonds |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 1,328,980 | 624,082
Gross unrealized gains | 6,429 | 0
Gross unrealized losses | (4,201) | (21,029)
Aggregate Fair Value | 1,331,208 | 603,053
Short-Term Marketable Securities | 276,975 | 362,458
Long-Term Marketable Securities | 1,054,233 | 240,595
U.S. government agency obligations |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 428,157 | 252,573
Gross unrealized gains | 2,462 | 0
Gross unrealized losses | (979) | (10,391)
Aggregate Fair Value | 429,640 | 242,182
Short-Term Marketable Securities | 74,369 | 180,320
Long-Term Marketable Securities | $ 355,271 | $ 61,862

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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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