Fair Value Measurements (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Fair Value Measurements
Marketable Securities	$ 965,347	$ 601,989
Recurring \| Estimate of Fair Value Measurement
Fair Value Measurements
Marketable Securities	965,347	601,989
Investments in Other Companies	26,112
Cash and Cash Equivalents	38,850	258,421
Total Assets Measured at Fair Value	1,030,309	860,410
Cost of cash and cash equivalents and available for sale securities	1,010,200	860,400
Recurring \| Estimate of Fair Value Measurement \| Corporate Bond Securities
Fair Value Measurements
Marketable Securities	645,346	54,673
Recurring \| Estimate of Fair Value Measurement \| Commercial Paper
Fair Value Measurements
Marketable Securities	320,001	547,316
Recurring \| Level 1
Fair Value Measurements
Investments in Other Companies	9,240
Cash and Cash Equivalents	38,850	258,421
Total Assets Measured at Fair Value	48,090	258,421
Recurring \| Level 2
Fair Value Measurements
Marketable Securities	965,347	601,989
Total Assets Measured at Fair Value	965,347	601,989
Recurring \| Level 2 \| Corporate Bond Securities
Fair Value Measurements
Marketable Securities	645,346	54,673
Recurring \| Level 2 \| Commercial Paper
Fair Value Measurements
Marketable Securities	320,001	$ 547,316
Recurring \| Level 3
Fair Value Measurements
Investments in Other Companies	16,872
Total Assets Measured at Fair Value	$ 16,872

Represents information pertaining to amortized cost of cash and cash equivalents and available for sale securities.

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- Definition

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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- Definition

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), classified as current.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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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.

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- Definition

Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI), classified as current.

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-Publisher FASB
-Name Accounting Standards Codification
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