Loans - Schedule of Loans Renegotiated in Troubled Debt Restructurings (Details) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2019 USD ($) note	Jun. 30, 2019 USD ($) note
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Number of Notes | note	1	1
Total loans restructured during period	$ 0.2	$ 0.2
Commercial real estate
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Number of Notes | note	1	1
Total loans restructured during period	$ 0.2	$ 0.2
Interest only period
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Total loans restructured during period	0.0	0.0
Interest only period | Commercial real estate
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Total loans restructured during period	0.0	0.0
Extension of term or amortization schedule
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Total loans restructured during period	0.2	0.2
Extension of term or amortization schedule | Commercial real estate
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Total loans restructured during period	0.2	0.2
Interest rate adjustment
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Total loans restructured during period	0.0	0.0
Interest rate adjustment | Commercial real estate
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Total loans restructured during period	0.0	0.0
Other
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Total loans restructured during period	0.0	0.0
Other | Commercial real estate
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Total loans restructured during period	$ 0.0	$ 0.0