Loans - Amortized Cost Basis of Collateral Dependent Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020	Sep. 30, 2020
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans	$ 2,627,795	$ 2,565,798	$ 2,564,009
Real Estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans	7,930
Real Estate | Commercial
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans	0
Real Estate | Commercial Real Estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans	7,254
Real Estate | Consumer
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans	0
Real Estate | Residential
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans	676
Residential Real Estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans	676
Residential Real Estate | Commercial
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans	0
Residential Real Estate | Commercial Real Estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans	0
Residential Real Estate | Consumer
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans	0
Residential Real Estate | Residential
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans	676
Commercial Real Estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans	7,254
Commercial Real Estate | Commercial
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans	0
Commercial Real Estate | Commercial Real Estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans	7,254
Commercial Real Estate | Consumer
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans	0
Commercial Real Estate | Residential
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans	$ 0