Loans - Loans Outstanding by Portfolio Class (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 3,711,717	$ 3,644,617
Allowance for credit losses	(52,508)	(54,286)	$ (57,186)	$ (57,027)
Net loans	3,659,209	3,590,331
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	2,259,327	2,213,945
Allowance for credit losses	(37,789)	(40,775)	(42,980)	(42,210)
Commercial | Owner occupied real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	573,669	560,887
Commercial | Non–owner occupied real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	1,113,198	1,088,470
Commercial | Residential spec homes
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	11,115	9,907
Commercial | Development & spec land
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	24,225	24,473
Commercial | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	537,120	530,208
Real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	698,490	703,413
Allowance for credit losses	(4,351)	(3,856)	(4,229)	(4,620)
Real estate | Residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	558,194	563,811
Real estate | Residential construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	35,178	30,571
Real estate | Mortgage warehouse
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	105,118	109,031
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	753,900	727,259
Allowance for credit losses	(9,313)	(8,596)	$ (8,814)	$ (8,930)
Consumer | Direct installment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	60,578	63,714
Consumer | Indirect installment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	395,450	372,575
Consumer | Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 297,872	$ 290,970