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Fair Value Measurements (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Securities, Available-for-Sale	$ 943,288	$ 935,844
Fair Value, Inputs, Level 1
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Securities, Available-for-Sale	105,574	88,073
Fair Value, Inputs, Level 2
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Securities, Available-for-Sale	837,714	847,771
Cash Equivalents
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Cash Equivalents	183,894	147,463
Cash Equivalents | Fair Value, Inputs, Level 1
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Cash Equivalents	105,574	88,073
Cash Equivalents | Fair Value, Inputs, Level 2
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Cash Equivalents	78,320	59,390
Short-Term Investments
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Securities, Available-for-Sale	690,593	725,063
Short-Term Investments | Fair Value, Inputs, Level 1
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Securities, Available-for-Sale	0	0
Short-Term Investments | Fair Value, Inputs, Level 2
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Securities, Available-for-Sale	690,593	725,063
Long Term Investments
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Securities, Available-for-Sale	68,801	63,318
Long Term Investments | Fair Value, Inputs, Level 1
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Securities, Available-for-Sale	0	0
Long Term Investments | Fair Value, Inputs, Level 2
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Securities, Available-for-Sale	68,801	63,318
Money market funds | Cash Equivalents
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Cash Equivalents	105,574	88,073
Money market funds | Cash Equivalents | Fair Value, Inputs, Level 1
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Cash Equivalents	105,574	88,073
Money market funds | Cash Equivalents | Fair Value, Inputs, Level 2
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Cash Equivalents	0	0
Commercial paper | Cash Equivalents
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Cash Equivalents	70,727	50,791
Commercial paper | Cash Equivalents | Fair Value, Inputs, Level 1
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Cash Equivalents	0	0
Commercial paper | Cash Equivalents | Fair Value, Inputs, Level 2
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Cash Equivalents	70,727	50,791
Commercial paper | Short-Term Investments
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Securities, Available-for-Sale	373,285	421,279
Commercial paper | Short-Term Investments | Fair Value, Inputs, Level 1
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Securities, Available-for-Sale	0	0
Commercial paper | Short-Term Investments | Fair Value, Inputs, Level 2
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Securities, Available-for-Sale	373,285	421,279
Municipal debt securities | Cash Equivalents
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Cash Equivalents	7,593	8,599
Municipal debt securities | Cash Equivalents | Fair Value, Inputs, Level 1
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Cash Equivalents	0	0
Municipal debt securities | Cash Equivalents | Fair Value, Inputs, Level 2
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Cash Equivalents	7,593	8,599
Municipal debt securities | Short-Term Investments
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Securities, Available-for-Sale	12,157	30,426
Municipal debt securities | Short-Term Investments | Fair Value, Inputs, Level 1
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Securities, Available-for-Sale	0	0
Municipal debt securities | Short-Term Investments | Fair Value, Inputs, Level 2
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Securities, Available-for-Sale	12,157	30,426
Municipal debt securities | Long Term Investments
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Securities, Available-for-Sale	7,636	7,580
Municipal debt securities | Long Term Investments | Fair Value, Inputs, Level 1
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Securities, Available-for-Sale	0
Municipal debt securities | Long Term Investments | Fair Value, Inputs, Level 2
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Securities, Available-for-Sale	7,636	7,580
US Treasury Bonds
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Securities, Available-for-Sale	23,457	0
US Treasury Bonds | Fair Value, Inputs, Level 1
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Securities, Available-for-Sale	0	0
US Treasury Bonds | Fair Value, Inputs, Level 2
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Securities, Available-for-Sale	23,457	0
Corporate debt securities
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Securities, Available-for-Sale	22,904	35,688
Corporate debt securities | Fair Value, Inputs, Level 1
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Securities, Available-for-Sale	0	0
Corporate debt securities | Fair Value, Inputs, Level 2
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Securities, Available-for-Sale	22,904	35,688
Corporate debt securities | Short-Term Investments
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Securities, Available-for-Sale	133,273	166,136
Corporate debt securities | Short-Term Investments | Fair Value, Inputs, Level 1
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Securities, Available-for-Sale	0	0
Corporate debt securities | Short-Term Investments | Fair Value, Inputs, Level 2
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Securities, Available-for-Sale	133,273	166,136
Federal agency debt securities
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Securities, Available-for-Sale	38,261	20,050
Federal agency debt securities | Fair Value, Inputs, Level 1
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Securities, Available-for-Sale	0	0
Federal agency debt securities | Fair Value, Inputs, Level 2
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Securities, Available-for-Sale	38,261	20,050
Federal agency debt securities | Short-Term Investments
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Securities, Available-for-Sale	148,421	107,222
Federal agency debt securities | Short-Term Investments | Fair Value, Inputs, Level 1
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Securities, Available-for-Sale	0	0
Federal agency debt securities | Short-Term Investments | Fair Value, Inputs, Level 2
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Securities, Available-for-Sale	$ 148,421	$ 107,222

X

- Definition

Amount of 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
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(6))
-URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 30
-Section 45
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=124258926&loc=SL82898722-210454

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
-Paragraph 1
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=124260329&loc=d3e26610-111562

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (aa)
-URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27161-111563

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- Definition

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.

+ References

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- Definition

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+ References

No definition available.

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