Qualified Affordable Housing (Details) $ in Millions	12 Months Ended
	Dec. 31, 2021 USD ($) housing_project	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Schedule of Equity Method Investments [Line Items]
Investments in qualified affordable housing projects	$ 12.6	$ 8.4
Tax credits to offset amortization expense of investments in affordable housing projects	2.0	2.2	$ 4.2
New Qualified Affordable Housing Project
Schedule of Equity Method Investments [Line Items]
Investments in qualified affordable housing projects	$ 19.4
Number of qualified affordable housing projects | housing_project	2
Funds invested, amount	$ 2.3
Noninterest Expense
Schedule of Equity Method Investments [Line Items]
Amortization expense of investments in qualified affordable housing projects	$ 1.2	$ 3.2	$ 2.6