Loans and Allowance for Credit Losses on Loans - Defaults on Troubled Debt Restructurings (Details) - item	6 Months Ended
Jun. 30, 2022	Jun. 30, 2021
Loans and Allowance for Credit Losses on Loans
Default period contractually past due under modified terms (in days)	30 days
Number of defaults on troubled debt restructurings	0	0
Period of consecutive payments (in months)	6 months

Number of financing receivable contracts modified as troubled debt restructuring within previous 12 months, with subsequent payment default.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 34
-URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953682-111524

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration