Fair Value Measurements (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash	$ 698,547	$ 560,609
Total adjusted cost	2,190,978	1,812,923
Unrealized Gains	13,140	5,654
Unrealized Losses	104	4,258
Fair value, subtotal	2,204,014	1,814,319
Current Investments	668,676	734,838
Long-term Investments	823,988	518,624
Fair Value, Inputs, Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash	622,772	432,151
Total adjusted cost	2,093,809	1,652,564
Unrealized Gains	12,907	4,365
Unrealized Losses	87	4,090
Fair value, subtotal	2,106,629	1,652,839
Current Investments	663,970	731,339
Long-term Investments	807,067	489,074
Fair Value, Inputs, Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Adjusted cost	21,394	31,901
Unrealized Gains	233	1,289
Unrealized Losses	17	168
Fair Value	21,610	33,022
Current Investments	4,706	3,499
Long-term Investments	16,921	29,550
U.S. Treasury securities \| Fair Value, Inputs, Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Adjusted cost	1,422,910	1,200,658
Unrealized Gains	12,552	4,352
Unrealized Losses	87	4,083
Fair Value	1,435,375	1,200,927
Current Investments	634,119	731,339
Long-term Investments	788,791	469,319
Corporate debt securities \| Fair Value, Inputs, Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Adjusted cost	48,127	19,755
Unrealized Gains	355	13
Unrealized Losses	0	7
Fair Value	48,482	19,761
Current Investments	29,851
Long-term Investments	18,276	19,755
Corporate debt securities \| Fair Value, Inputs, Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Adjusted cost	16,801	17,401
Unrealized Losses	17	27
Fair Value	16,784	17,374
Current Investments	1,600	999
Long-term Investments	15,201	16,402
Notes receivable \| Fair Value, Inputs, Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Adjusted cost	4,593	14,500
Unrealized Gains	233	1,289
Unrealized Losses		141
Fair Value	4,826	15,648
Current Investments	3,106	2,500
Long-term Investments	1,720	13,148
Cash
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash	75,775	128,458
Money market funds \| Fair Value, Inputs, Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash	545,215	355,872
Time deposits \| Fair Value, Inputs, Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash	$ 77,557	$ 76,279

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

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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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