Loans, Lending Commitments and Related Allowance for Credit Losses - Schedule of Selected Credit Ratios (Details)	Dec. 31, 2021	Dec. 31, 2020
Receivables [Abstract]
ACL to total loans	0.40%	0.60%
Nonaccrual loans to total loans	0.50%	0.40%
ACL to nonaccrual loans	73.20%	141.30%

Percentage of allowance for credit loss to nonaccrual financing receivable.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher SEC
-Name Regulation S-K (SK)
-Number 229
-Section 1405
-Paragraph (a)
-Subparagraph (3)

+ Details

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Period Type:	instant

- Definition

Percentage of allowance for credit loss to total financing receivable outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher SEC
-Name Regulation S-K (SK)
-Number 229
-Section 1405
-Paragraph (a)
-Subparagraph (1)

+ Details

Name:	srt_FinancingReceivableAllowanceForCreditLossToOutstandingPercent
Namespace Prefix:	srt_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage of nonaccrual to total financing receivable outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher SEC
-Name Regulation S-K (SK)
-Number 229
-Section 1405
-Paragraph (a)
-Subparagraph (2)

+ Details

Name:	srt_FinancingReceivableNonaccrualToOutstandingPercent
Namespace Prefix:	srt_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- References

No definition available.

+ Details

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