Loans - Amortized Cost Basis of Collateral Dependent Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans	$ 2,612,403	$ 2,565,798	$ 2,390,556
Real Estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans	5,007
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	3,851
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	1,156
Residential Real Estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans	1,156
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	1,156
Commercial Real Estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Loans	3,851
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	3,851
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