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Fair Value Measures (Assets and Liabilities Measured at Fair Value on a Recurring Basis) (Details) - USD ($) $ in Thousands | Mar. 31, 2024 | Dec. 31, 2023 | Mar. 31, 2023
--- | --- | --- | ---
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Assets, Fair Value Disclosure | $ 589,187 | $ 578,561 | $ 301,424
Liabilities, Fair Value Disclosure | 2,073 | 9,019 | 6,675
Level 1 |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Assets, Fair Value Disclosure | 86,413 | 103,560 | 129,332
Liabilities, Fair Value Disclosure | 0 | 0 | 0
Level 2 |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Assets, Fair Value Disclosure | 502,774 | 475,001 | 172,092
Liabilities, Fair Value Disclosure | 2,073 | 9,019 | 6,675
Level 3 |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Assets, Fair Value Disclosure | 0 | 0 | 0
Liabilities, Fair Value Disclosure | 0 | 0 | 0
Money market funds | Cash equivalents: |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Assets, Fair Value Disclosure | 57,144 | 75,758 | 106,092
Money market funds | Short-term investments: |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Assets, Fair Value Disclosure | 343 | 314 | 284
Money market funds | Other non-current assets: |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Assets, Fair Value Disclosure | 1,532 | 1,796 | 1,712
Money market funds | Level 1 | Cash equivalents: |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Assets, Fair Value Disclosure | 57,144 | 75,758 | 106,092
Money market funds | Level 1 | Short-term investments: |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Assets, Fair Value Disclosure | 343 | 314 | 284
Money market funds | Level 1 | Other non-current assets: |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Assets, Fair Value Disclosure | 1,532 | 1,796 | 1,712
Money market funds | Level 2 | Cash equivalents: |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Assets, Fair Value Disclosure | 0 | 0 | 0
Money market funds | Level 2 | Short-term investments: |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Assets, Fair Value Disclosure | 0 | 0 | 0
Money market funds | Level 2 | Other non-current assets: |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Assets, Fair Value Disclosure | 0 | 0 | 0
Money market funds | Level 3 | Cash equivalents: |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Assets, Fair Value Disclosure | 0 | 0 | 0
Money market funds | Level 3 | Short-term investments: |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Assets, Fair Value Disclosure | 0 | 0 | 0
Money market funds | Level 3 | Other non-current assets: |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Assets, Fair Value Disclosure | 0 | 0 | 0
U.S. Government treasury bills | Cash equivalents: |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Assets, Fair Value Disclosure | 74,828 | 9,977 | 49,695
U.S. Government treasury bills | Available-for-sale Securities |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Assets, Fair Value Disclosure | 366,982 | 412,987 | 98,746
U.S. Government treasury bills | Level 1 | Cash equivalents: |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Assets, Fair Value Disclosure | 0 | 0 | 0
U.S. Government treasury bills | Level 1 | Available-for-sale Securities |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Assets, Fair Value Disclosure | 0 | 0 | 0
U.S. Government treasury bills | Level 2 | Cash equivalents: |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Assets, Fair Value Disclosure | 74,828 | 9,977 | 49,695
U.S. Government treasury bills | Level 2 | Available-for-sale Securities |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Assets, Fair Value Disclosure | 366,982 | 412,987 | 98,746
U.S. Government treasury bills | Level 3 | Cash equivalents: |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Assets, Fair Value Disclosure | 0 | 0 | 0
U.S. Government treasury bills | Level 3 | Available-for-sale Securities |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Assets, Fair Value Disclosure | 0 | 0 | 0
Derivative financial instruments | Prepaid expenses and other current assets: |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Assets, Fair Value Disclosure | 14,842 | 10,200 | 17,716
Derivative financial instruments | Other non-current assets: |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Assets, Fair Value Disclosure | 5,423 | 961 | 5,935
Derivative financial instruments | Level 1 | Prepaid expenses and other current assets: |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Assets, Fair Value Disclosure | 0 | 0 | 0
Derivative financial instruments | Level 1 | Other non-current assets: |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Assets, Fair Value Disclosure | 0 | 0 | 0
Derivative financial instruments | Level 2 | Prepaid expenses and other current assets: |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Assets, Fair Value Disclosure | 14,842 | 10,200 | 17,716
Derivative financial instruments | Level 2 | Other non-current assets: |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Assets, Fair Value Disclosure | 5,423 | 961 | 5,935
Derivative financial instruments | Level 3 | Prepaid expenses and other current assets: |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Assets, Fair Value Disclosure | 0 | 0 | 0
Derivative financial instruments | Level 3 | Other non-current assets: |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Assets, Fair Value Disclosure | 0 | 0 | 0
Derivative financial instruments | Accrued liabilities: |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Liabilities, Fair Value Disclosure | 1,918 | 6,390 | 4,887
Derivative financial instruments | Other long-term liabilities: |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Liabilities, Fair Value Disclosure | 155 | 2,629 | 1,788
Derivative financial instruments | Level 1 | Accrued liabilities: |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Liabilities, Fair Value Disclosure | 0 | 0 | 0
Derivative financial instruments | Level 1 | Other long-term liabilities: |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Liabilities, Fair Value Disclosure | 0 | 0 | 0
Derivative financial instruments | Level 2 | Accrued liabilities: |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Liabilities, Fair Value Disclosure | 1,918 | 6,390 | 4,887
Derivative financial instruments | Level 2 | Other long-term liabilities: |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Liabilities, Fair Value Disclosure | 155 | 2,629 | 1,788
Derivative financial instruments | Level 3 | Accrued liabilities: |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Liabilities, Fair Value Disclosure | 0 | 0 | 0
Derivative financial instruments | Level 3 | Other long-term liabilities: |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Liabilities, Fair Value Disclosure | 0 | 0 | 0
Mutual fund shares | Short-term investments: |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Assets, Fair Value Disclosure | 1,945 | 884 | 482
Mutual fund shares | Other non-current assets: |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Assets, Fair Value Disclosure | 25,449 | 24,808 | 20,762
Mutual fund shares | Level 1 | Short-term investments: |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Assets, Fair Value Disclosure | 1,945 | 884 | 482
Mutual fund shares | Level 1 | Other non-current assets: |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Assets, Fair Value Disclosure | 25,449 | 24,808 | 20,762
Mutual fund shares | Level 2 | Short-term investments: |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Assets, Fair Value Disclosure | 0 | 0 | 0
Mutual fund shares | Level 2 | Other non-current assets: |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Assets, Fair Value Disclosure | 0 | 0 | 0
Mutual fund shares | Level 3 | Short-term investments: |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Assets, Fair Value Disclosure | 0 | 0 | 0
Mutual fund shares | Level 3 | Other non-current assets: |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Assets, Fair Value Disclosure | 0 | 0 | $ 0
Time deposits | Cash equivalents: |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Assets, Fair Value Disclosure | 40,699 | 40,876 |
Time deposits | Level 1 | Cash equivalents: |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Assets, Fair Value Disclosure | 0 | 0 |
Time deposits | Level 2 | Cash equivalents: |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Assets, Fair Value Disclosure | 40,699 | 40,876 |
Time deposits | Level 3 | Cash equivalents: |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Assets, Fair Value Disclosure | $ 0 | $ 0 |

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