Fair Value Measurements (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash	$ 727,394	$ 560,609
Total adjusted cost	2,148,671	1,812,923
Unrealized Gains	2,203	5,654
Unrealized Losses	4,350	4,258
Fair value, subtotal	2,146,524	1,814,319
Current Investments	692,474	734,838
Long-term Investments	729,951	518,624
Fair Value, Inputs, Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash	569,080	432,151
Total adjusted cost	1,961,155	1,652,564
Unrealized Gains	639	4,365
Unrealized Losses	4,209	4,090
Fair value, subtotal	1,957,585	1,652,839
Current Investments	691,274	731,339
Long-term Investments	700,801	489,074
Fair Value, Inputs, Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Adjusted cost	29,202	31,901
Unrealized Gains	1,564	1,289
Unrealized Losses	141	168
Fair Value	30,625	33,022
Current Investments	1,200	3,499
Long-term Investments	29,150	29,550
U.S. Treasury securities \| Fair Value, Inputs, Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Adjusted cost	1,357,606	1,200,658
Unrealized Gains	639	4,352
Unrealized Losses	4,041	4,083
Fair Value	1,354,204	1,200,927
Current Investments	691,274	731,339
Long-term Investments	666,332	469,319
Corporate debt securities \| Fair Value, Inputs, Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Adjusted cost	34,469	19,755
Unrealized Gains		13
Unrealized Losses	168	7
Fair Value	34,301	19,761
Long-term Investments	34,469	19,755
Corporate debt securities \| Fair Value, Inputs, Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Adjusted cost	17,201	17,401
Unrealized Gains	275
Unrealized Losses		27
Fair Value	17,476	17,374
Current Investments	1,200	999
Long-term Investments	16,001	16,402
Notes receivable \| Fair Value, Inputs, Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Adjusted cost	12,001	14,500
Unrealized Gains	1,289	1,289
Unrealized Losses	141	141
Fair Value	13,149	15,648
Current Investments		2,500
Long-term Investments	13,149	13,148
Cash
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash	158,314	128,458
Money market funds \| Fair Value, Inputs, Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash	492,228	355,872
Time deposits \| Fair Value, Inputs, Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash	$ 76,852	$ 76,279

Cash And Cash Equivalents At Carrying Value And Debt Securities, Held-to-Maturity, Amortized Cost

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Cash And Cash Equivalents At Carrying Value And Debt Securities, Held-to-Maturity, Fair Value

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Amount 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. Excludes cash and cash equivalents within disposal group and discontinued operation.

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Amount, before allowance for credit loss, of investment in debt security measured at amortized cost (held-to-maturity).

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