Loans and Allowance for Credit Losses for Loans - Summary of Collateral Dependent Loans (Details) - Collateral Pledged $ in Thousands	Sep. 30, 2020 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collateral dependent loans	$ 191,864
Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collateral dependent loans	115,877
Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collateral dependent loans	47,043
Commercial real estate | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collateral dependent loans	44,638
Commercial real estate | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collateral dependent loans	2,405
Residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collateral dependent loans	28,856
Consumer | Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collateral dependent loans	$ 88