Fair Value of Assets and Liabilities - Additional Information (Details) - Significant Other Unobservable Inputs (Level 3) $ in Millions	Dec. 31, 2020 USD ($) branch	Dec. 31, 2019 USD ($)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Number of branches closed | branch	12
Valuation allowance equipment held for sale	$ 7.0	$ 0.2
Net Occupancy Expense
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Valuation allowance equipment held for sale	3.6
Interest and Fees on Loans and Leases
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Valuation allowance equipment held for sale	3.0
Net Equipment Expense
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Valuation allowance equipment held for sale	$ 0.4