Summary of Significant Accounting Policies, Allowance for Credit Losses - Loans (Details) $ in Millions	12 Months Ended
	Dec. 31, 2021 USD ($) Loan	Dec. 31, 2020 USD ($) Loan
Minimum [Member]
Allowance for Credit Losses [Abstract]
Threshold period past due for loans to be written off	90 days
Maximum [Member]
Allowance for Credit Losses [Abstract]
Threshold period past due for loans to be written off	120 days
Paycheck Protection Program [Member]
Allowance for Credit Losses [Abstract]
Number of loans processed | Loan	3,100	3,000
Amount of loans processed	$ 287.0
Number of loans on which payments were received | Loan	4,505	214
Amount of loan payments received	$ 632.4	$ 72.7
Paycheck Protection Program [Member] | Minimum [Member]
Allowance for Credit Losses [Abstract]
Amount of loans processed		$ 548.0
Commercial Loans [Member] | Commercial Real Estate [Member] | Maximum [Member]
Allowance for Credit Losses [Abstract]
Loan amount, percentage of appraised value or purchase price of the property	80.00%
Consumer Loans [Member] | Auto [Member] | Minimum [Member]
Allowance for Credit Losses [Abstract]
Principal repayment term of loan	3 years
Consumer Loans [Member] | Auto [Member] | Maximum [Member]
Allowance for Credit Losses [Abstract]
Principal repayment term of loan	6 years
Consumer Loans [Member] | Installment Loans [Member] | Minimum [Member]
Allowance for Credit Losses [Abstract]
Principal repayment term of loan	1 year
Consumer Loans [Member] | Installment Loans [Member] | Maximum [Member]
Allowance for Credit Losses [Abstract]
Principal repayment term of loan	15 years
Residential [Member] | Maximum [Member]
Allowance for Credit Losses [Abstract]
Loan amount, percentage of appraised value or purchase price of the property	85.00%
Residential [Member] | Home Equity [Member] | Maximum [Member]
Allowance for Credit Losses [Abstract]
Loan amount, percentage of equity in property	85.00%
Term of draw	10 years
Term of amortization	15 years