Loans - Schedule of Portfolio Loans, Purchased Credit Impaired Loans and Purchased Unimpaired Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 5,735,349	$ 5,198,404
Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	245,108	325,113
Commercial real estate - owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	1,141,310	1,000,000
Commercial real estate - non-owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	1,395,854
Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		2,378,971
Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	1,342,628	1,507,863
Commercial and financial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	854,753	778,252
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	188,735	208,205
Paycheck Protection Program
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	566,961
Portfolio Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	4,711,737	4,317,918
Portfolio Loans | Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	216,420	281,335
Portfolio Loans | Commercial real estate - owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	854,769
Portfolio Loans | Commercial real estate - non-owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	1,043,459
Portfolio Loans | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		1,834,811
Portfolio Loans | Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	1,155,914	1,304,305
Portfolio Loans | Commercial and financial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	743,846	697,301
Portfolio Loans | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	181,797	200,166
Portfolio Loans | Paycheck Protection Program
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	515,532
PULs
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		867,820
PULs | Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		43,618
PULs | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		533,943
PULs | Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		201,848
PULs | Commercial and financial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		80,372
PULs | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		8,039
PCI Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		12,666
PCI Loans | Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		160
PCI Loans | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		10,217
PCI Loans | Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		1,710
PCI Loans | Commercial and financial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		579
PCI Loans | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		0
Acquired Non-PCD Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	925,434	867,820
Acquired Non-PCD Loans | Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	26,250	43,618
Acquired Non-PCD Loans | Commercial real estate - owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	247,090
Acquired Non-PCD Loans | Commercial real estate - non-owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	323,273
Acquired Non-PCD Loans | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		533,943
Acquired Non-PCD Loans | Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	176,105	201,848
Acquired Non-PCD Loans | Commercial and financial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	94,627	80,372
Acquired Non-PCD Loans | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	6,660	8,039
Acquired Non-PCD Loans | Paycheck Protection Program
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	51,429
PCD Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	98,178	12,666
PCD Loans | Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	2,438	160
PCD Loans | Commercial real estate - owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	39,451
PCD Loans | Commercial real estate - non-owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	29,122
PCD Loans | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		10,217
PCD Loans | Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	10,609	1,710
PCD Loans | Commercial and financial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	16,280	579
PCD Loans | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	278	$ 0
PCD Loans | Paycheck Protection Program
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 0