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Securities - Additional Information (Details) - USD ($)	Sep. 30, 2021	Dec. 31, 2020
Investments, Debt and Equity Securities [Abstract]
Allowance for credit losses for available for sale debt securities	$ 0	$ 0
Accrued interest receivable on available for sale debt securities	$ 13,100,000	$ 8,100,000

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- Definition

Debt Securities, Available-for-Sale, Accrued Interest

+ References

No definition available.

+ Details

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- Definition

Amount excluding accrued interest, of allowance for credit loss on 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 326
-SubTopic 30
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=124258926&loc=SL82898722-210454

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- References

No definition available.

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