Loans - Additional Information (Details) $ in Millions	6 Months Ended
	Jun. 30, 2021 USD ($) loan_portfolio	Dec. 31, 2020 USD ($)
Financing Receivable, Allowance for Credit Loss [Line Items]
Number of loan portfolios | loan_portfolio	4
Off-balance sheet, credit loss, liability	$ 1.5
Cumulative Effect, Period of Adoption, Adjusted Balance
Financing Receivable, Allowance for Credit Loss [Line Items]
Off-balance sheet, credit loss, liability		$ 1.1
Consumer | Minimum | Automobile Loan
Financing Receivable, Allowance for Credit Loss [Line Items]
Principal repayment terms, period	3 years
Consumer | Minimum | Credit Card Receivable
Financing Receivable, Allowance for Credit Loss [Line Items]
Principal repayment terms, period	1 year
Consumer | Maximum | Automobile Loan
Financing Receivable, Allowance for Credit Loss [Line Items]
Principal repayment terms, period	7 years
Consumer | Maximum | Credit Card Receivable
Financing Receivable, Allowance for Credit Loss [Line Items]
Principal repayment terms, period	5 years