Loans - Schedule of Portfolio Loans, Purchased Credit Impaired Loans and Purchased Unimpaired Loans (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 5,437,049	$ 5,735,349
Portfolio Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	4,641,153	4,711,737
Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	234,347	245,108
Construction and land development | Portfolio Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	223,412	216,420
Commercial real estate - owner-occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	1,127,640	1,141,310
Commercial real estate - owner-occupied | Portfolio Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	889,221	854,769
Commercial real estate - non owner-occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	1,412,439	1,395,854
Commercial real estate - non owner-occupied | Portfolio Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	1,112,290	1,043,459
Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	1,226,536	1,342,628
Residential real estate | Portfolio Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	1,087,313	1,155,914
Commercial and financial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	900,206	854,753
Commercial and financial | Portfolio Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	811,580	743,846
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	171,769	188,735
Consumer | Portfolio Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	166,806	181,797
Paycheck Protection Program
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	364,112	566,961
Paycheck Protection Program | Portfolio Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	350,531	515,532
Acquired Non-PCD Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	713,933	925,434
Acquired Non-PCD Loans | Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	10,408	26,250
Acquired Non-PCD Loans | Commercial real estate - owner-occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	203,847	247,090
Acquired Non-PCD Loans | Commercial real estate - non owner-occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	274,772	323,273
Acquired Non-PCD Loans | Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	131,131	176,105
Acquired Non-PCD Loans | Commercial and financial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	75,245	94,627
Acquired Non-PCD Loans | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	4,949	6,660
Acquired Non-PCD Loans | Paycheck Protection Program
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	13,581	51,429
PCD Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	81,963	98,178
PCD Loans | Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	527	2,438
PCD Loans | Commercial real estate - owner-occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	34,572	39,451
PCD Loans | Commercial real estate - non owner-occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	25,377	29,122
PCD Loans | Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	8,092	10,609
PCD Loans | Commercial and financial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	13,381	16,280
PCD Loans | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	14	278
PCD Loans | Paycheck Protection Program
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 0	$ 0