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Investments and Fair Value Measurements - Narrative (Details) - security	Sep. 30, 2021	Dec. 31, 2020
Fair Value Disclosures [Abstract]
Securities in a continuous loss position (in securities)	0	0

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- Definition

Number of investments in debt securities measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for 12 months or longer, without an allowance for credit loss. Includes beneficial interest in securitized financial asset.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 30
-Section 50
-Paragraph 4
-Subparagraph (b)(3)
-URI http://asc.fasb.org/extlink&oid=124269663&loc=SL82922888-210455

+ Details

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Balance Type:	na
Period Type:	instant

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- References

No definition available.

+ Details

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