Loans and Leases - Summary of Collateral-Dependent Loans Held for Investment by Collateral Type (Details) $ in Thousands	Sep. 30, 2020 USD ($)
Real Estate
Disclosure of Summary of Collateral Dependent Loans Held for Investment by Collateral Type [Line Items]
Assets received as collateral	$ 27,614
Real Estate | Commercial Real Estate
Disclosure of Summary of Collateral Dependent Loans Held for Investment by Collateral Type [Line Items]
Loans and leases receivable, collateral for secured borrowings	27,051
Real Estate | One-to-Four Family
Disclosure of Summary of Collateral Dependent Loans Held for Investment by Collateral Type [Line Items]
Loans and leases receivable, collateral for secured borrowings	563
Other
Disclosure of Summary of Collateral Dependent Loans Held for Investment by Collateral Type [Line Items]
Loans and leases receivable, collateral for secured borrowings	34,447
Other | Commercial and Industrial
Disclosure of Summary of Collateral Dependent Loans Held for Investment by Collateral Type [Line Items]
Loans and leases receivable, collateral for secured borrowings	$ 34,447