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Long-Term Investments - Summary of Investment (Detail) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Cash and Cash Equivalents [Member]
Debt Securities, Available-for-Sale [Line Items]
Estimated Fair Value	$ 227,784	$ 190,611
Other Long-term Investment [Member]
Debt Securities, Available-for-Sale [Line Items]
Estimated Fair Value	2,611	2,622
Auction Rate Securities [Member] | Other Long-term Investment [Member]
Debt Securities, Available-for-Sale [Line Items]
Estimated Fair Value	2,611	2,622
Estimate of Fair Value Measurement [Member] | Cash and Cash Equivalents [Member]
Debt Securities, Available-for-Sale [Line Items]
Estimated Fair Value	187,777	143,274
Estimate of Fair Value Measurement [Member] | Other Long-term Investment [Member]
Debt Securities, Available-for-Sale [Line Items]
Estimated Fair Value	2,611	2,622
Estimate of Fair Value Measurement [Member] | Auction Rate Securities [Member] | Other Long-term Investment [Member]
Debt Securities, Available-for-Sale [Line Items]
Estimated Fair Value	2,611	2,622
Estimate of Fair Value Measurement [Member] | Money market funds [Member] | Cash and Cash Equivalents [Member]
Debt Securities, Available-for-Sale [Line Items]
Estimated Fair Value	187,777	143,274
Portion at Other than Fair Value Measurement [Member] | Cash [Member] | Cash and Cash Equivalents [Member]
Debt Securities, Available-for-Sale [Line Items]
Estimated Fair Value	$ 40,007	$ 47,337

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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481800/320-10-50-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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-URI https://asc.fasb.org//1943274/2147481800/320-10-50-2

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
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-Section 50
-Paragraph 2
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-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481800/320-10-50-2

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
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-URI https://asc.fasb.org//1943274/2147481800/320-10-50-2

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
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Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
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-Section 50
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-URI https://asc.fasb.org//1943274/2147481800/320-10-50-3

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
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-Section 50
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-URI https://asc.fasb.org//1943274/2147481800/320-10-50-3

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
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-URI https://asc.fasb.org//1943274/2147481800/320-10-50-3

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
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-URI https://asc.fasb.org//1943274/2147481800/320-10-50-3

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
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-Name Accounting Standards Codification
-Section 50
-Paragraph 3
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-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481800/320-10-50-3

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