Loans - Past Due Financing Receivables (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Financing Receivable, Past Due [Line Items]
Current	$ 5,689,158	$ 5,163,098
Nonaccrual	36,110	26,955
Loans	5,735,349	5,198,404
Accruing 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	6,382	7,259
Accruing 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	3,636	984
Accruing Greater Than 90 Days
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	63	108
Construction and land development
Financing Receivable, Past Due [Line Items]
Nonaccrual	167	4,937
Loans	245,108	325,113
Commercial real estate
Financing Receivable, Past Due [Line Items]
Nonaccrual		6,520
Loans		2,378,971
Commercial real estate - owner occupied
Financing Receivable, Past Due [Line Items]
Nonaccrual	8,181
Loans	1,141,310	1,000,000
Commercial real estate - non-owner occupied
Financing Receivable, Past Due [Line Items]
Nonaccrual	8,084
Loans	1,395,854
Residential real estate
Financing Receivable, Past Due [Line Items]
Nonaccrual	12,492	9,480
Loans	1,342,628	1,507,863
Commercial and financial
Financing Receivable, Past Due [Line Items]
Nonaccrual	6,604	5,908
Loans	854,753	778,252
Consumer
Financing Receivable, Past Due [Line Items]
Nonaccrual	582	110
Loans	188,735	208,205
Paycheck Protection Program
Financing Receivable, Past Due [Line Items]
Loans	566,961
Portfolio Loans
Financing Receivable, Past Due [Line Items]
Current	4,685,456	4,290,227
Nonaccrual	18,270	20,990
Loans	4,711,737	4,317,918
Portfolio Loans | Accruing 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	4,416	6,040
Portfolio Loans | Accruing 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	3,532	553
Portfolio Loans | Accruing Greater Than 90 Days
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	63	108
Portfolio Loans | Construction and land development
Financing Receivable, Past Due [Line Items]
Current	216,262	276,984
Nonaccrual	158	4,351
Loans	216,420	281,335
Portfolio Loans | Construction and land development | Accruing 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0	0
Portfolio Loans | Construction and land development | Accruing 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0	0
Portfolio Loans | Construction and land development | Accruing Greater Than 90 Days
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0	0
Portfolio Loans | Commercial real estate
Financing Receivable, Past Due [Line Items]
Current		1,828,629
Nonaccrual		4,356
Loans		1,834,811
Portfolio Loans | Commercial real estate | Accruing 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due		1,606
Portfolio Loans | Commercial real estate | Accruing 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due		220
Portfolio Loans | Commercial real estate | Accruing Greater Than 90 Days
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due		0
Portfolio Loans | Commercial real estate - owner occupied
Financing Receivable, Past Due [Line Items]
Current	851,222
Nonaccrual	2,471
Loans	854,769
Portfolio Loans | Commercial real estate - owner occupied | Accruing 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	1,076
Portfolio Loans | Commercial real estate - owner occupied | Accruing 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0
Portfolio Loans | Commercial real estate - owner occupied | Accruing Greater Than 90 Days
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0
Portfolio Loans | Commercial real estate - non-owner occupied
Financing Receivable, Past Due [Line Items]
Current	1,041,306
Nonaccrual	2,153
Loans	1,043,459
Portfolio Loans | Commercial real estate - non-owner occupied | Accruing 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0
Portfolio Loans | Commercial real estate - non-owner occupied | Accruing 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0
Portfolio Loans | Commercial real estate - non-owner occupied | Accruing Greater Than 90 Days
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0
Portfolio Loans | Residential real estate
Financing Receivable, Past Due [Line Items]
Current	1,142,893	1,294,778
Nonaccrual	8,531	7,945
Loans	1,155,914	1,304,305
Portfolio Loans | Residential real estate | Accruing 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	3,002	1,564
Portfolio Loans | Residential real estate | Accruing 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	1,427	18
Portfolio Loans | Residential real estate | Accruing Greater Than 90 Days
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	61	0
Portfolio Loans | Commercial and financial
Financing Receivable, Past Due [Line Items]
Current	737,362	690,412
Nonaccrual	4,382	4,228
Loans	743,846	697,301
Portfolio Loans | Commercial and financial | Accruing 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	135	2,553
Portfolio Loans | Commercial and financial | Accruing 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	1,967	0
Portfolio Loans | Commercial and financial | Accruing Greater Than 90 Days
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0	108
Portfolio Loans | Consumer
Financing Receivable, Past Due [Line Items]
Current	180,879	199,424
Nonaccrual	575	110
Loans	181,797	200,166
Portfolio Loans | Consumer | Accruing 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	203	317
Portfolio Loans | Consumer | Accruing 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	138	315
Portfolio Loans | Consumer | Accruing Greater Than 90 Days
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	2	0
Portfolio Loans | Paycheck Protection Program
Financing Receivable, Past Due [Line Items]
Current	515,532
Nonaccrual	0
Loans	515,532
Portfolio Loans | Paycheck Protection Program | Accruing 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0
Portfolio Loans | Paycheck Protection Program | Accruing 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0
Portfolio Loans | Paycheck Protection Program | Accruing Greater Than 90 Days
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0
Acquired Non-PCD Loans
Financing Receivable, Past Due [Line Items]
Current	915,799	862,272
Nonaccrual	7,690	3,898
Loans	925,434	867,820
Acquired Non-PCD Loans | Accruing 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	1,841	1,219
Acquired Non-PCD Loans | Accruing 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	104	431
Acquired Non-PCD Loans | Accruing Greater Than 90 Days
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0	0
Acquired Non-PCD Loans | Construction and land development
Financing Receivable, Past Due [Line Items]
Current	26,250	43,044
Nonaccrual	0	574
Loans	26,250	43,618
Acquired Non-PCD Loans | Construction and land development | Accruing 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0	0
Acquired Non-PCD Loans | Construction and land development | Accruing 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0	0
Acquired Non-PCD Loans | Construction and land development | Accruing Greater Than 90 Days
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0	0
Acquired Non-PCD Loans | Commercial real estate
Financing Receivable, Past Due [Line Items]
Current		531,325
Nonaccrual		1,245
Loans		533,943
Acquired Non-PCD Loans | Commercial real estate | Accruing 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due		942
Acquired Non-PCD Loans | Commercial real estate | Accruing 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due		431
Acquired Non-PCD Loans | Commercial real estate | Accruing Greater Than 90 Days
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due		0
Acquired Non-PCD Loans | Commercial real estate - owner occupied
Financing Receivable, Past Due [Line Items]
Current	244,486
Nonaccrual	2,604
Loans	247,090
Acquired Non-PCD Loans | Commercial real estate - owner occupied | Accruing 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0
Acquired Non-PCD Loans | Commercial real estate - owner occupied | Accruing 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0
Acquired Non-PCD Loans | Commercial real estate - owner occupied | Accruing Greater Than 90 Days
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0
Acquired Non-PCD Loans | Commercial real estate - non-owner occupied
Financing Receivable, Past Due [Line Items]
Current	322,264
Nonaccrual	1,009
Loans	323,273
Acquired Non-PCD Loans | Commercial real estate - non-owner occupied | Accruing 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0
Acquired Non-PCD Loans | Commercial real estate - non-owner occupied | Accruing 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0
Acquired Non-PCD Loans | Commercial real estate - non-owner occupied | Accruing Greater Than 90 Days
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0
Acquired Non-PCD Loans | Residential real estate
Financing Receivable, Past Due [Line Items]
Current	171,507	201,159
Nonaccrual	2,889	412
Loans	176,105	201,848
Acquired Non-PCD Loans | Residential real estate | Accruing 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	1,605	277
Acquired Non-PCD Loans | Residential real estate | Accruing 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	104	0
Acquired Non-PCD Loans | Residential real estate | Accruing Greater Than 90 Days
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0	0
Acquired Non-PCD Loans | Commercial and financial
Financing Receivable, Past Due [Line Items]
Current	93,223	78,705
Nonaccrual	1,188	1,667
Loans	94,627	80,372
Acquired Non-PCD Loans | Commercial and financial | Accruing 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	216	0
Acquired Non-PCD Loans | Commercial and financial | Accruing 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0	0
Acquired Non-PCD Loans | Commercial and financial | Accruing Greater Than 90 Days
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0	0
Acquired Non-PCD Loans | Consumer
Financing Receivable, Past Due [Line Items]
Current	6,640	8,039
Nonaccrual	0	0
Loans	6,660	8,039
Acquired Non-PCD Loans | Consumer | Accruing 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	20	0
Acquired Non-PCD Loans | Consumer | Accruing 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0	0
Acquired Non-PCD Loans | Consumer | Accruing Greater Than 90 Days
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0	0
Acquired Non-PCD Loans | Paycheck Protection Program
Financing Receivable, Past Due [Line Items]
Current	51,429
Nonaccrual	0
Loans	51,429
Acquired Non-PCD Loans | Paycheck Protection Program | Accruing 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0
Acquired Non-PCD Loans | Paycheck Protection Program | Accruing 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0
Acquired Non-PCD Loans | Paycheck Protection Program | Accruing Greater Than 90 Days
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0
PCD Loans
Financing Receivable, Past Due [Line Items]
Current	87,903	10,599
Nonaccrual	10,150	2,067
Loans	98,178	12,666
PCD Loans | Accruing 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	125	0
PCD Loans | Accruing 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0	0
PCD Loans | Accruing Greater Than 90 Days
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0	0
PCD Loans | Construction and land development
Financing Receivable, Past Due [Line Items]
Current	2,429	148
Nonaccrual	9	12
Loans	2,438	160
PCD Loans | Construction and land development | Accruing 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0	0
PCD Loans | Construction and land development | Accruing 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0	0
PCD Loans | Construction and land development | Accruing Greater Than 90 Days
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0	0
PCD Loans | Commercial real estate
Financing Receivable, Past Due [Line Items]
Current		9,298
Nonaccrual		919
Loans		10,217
PCD Loans | Commercial real estate | Accruing 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due		0
PCD Loans | Commercial real estate | Accruing 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due		0
PCD Loans | Commercial real estate | Accruing Greater Than 90 Days
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due		0
PCD Loans | Commercial real estate - owner occupied
Financing Receivable, Past Due [Line Items]
Current	36,345
Nonaccrual	3,106
Loans	39,451
PCD Loans | Commercial real estate - owner occupied | Accruing 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0
PCD Loans | Commercial real estate - owner occupied | Accruing 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0
PCD Loans | Commercial real estate - owner occupied | Accruing Greater Than 90 Days
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0
PCD Loans | Commercial real estate - non-owner occupied
Financing Receivable, Past Due [Line Items]
Current	24,200
Nonaccrual	4,922
Loans	29,122
PCD Loans | Commercial real estate - non-owner occupied | Accruing 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0
PCD Loans | Commercial real estate - non-owner occupied | Accruing 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0
PCD Loans | Commercial real estate - non-owner occupied | Accruing Greater Than 90 Days
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0
PCD Loans | Residential real estate
Financing Receivable, Past Due [Line Items]
Current	9,537	587
Nonaccrual	1,072	1,123
Loans	10,609	1,710
PCD Loans | Residential real estate | Accruing 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0	0
PCD Loans | Residential real estate | Accruing 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0	0
PCD Loans | Residential real estate | Accruing Greater Than 90 Days
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0	0
PCD Loans | Commercial and financial
Financing Receivable, Past Due [Line Items]
Current	15,121	566
Nonaccrual	1,034	13
Loans	16,280	579
PCD Loans | Commercial and financial | Accruing 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	125	0
PCD Loans | Commercial and financial | Accruing 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0	0
PCD Loans | Commercial and financial | Accruing Greater Than 90 Days
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0	0
PCD Loans | Consumer
Financing Receivable, Past Due [Line Items]
Current	271	0
Nonaccrual	7	0
Loans	278	0
PCD Loans | Consumer | Accruing 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0	0
PCD Loans | Consumer | Accruing 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0	0
PCD Loans | Consumer | Accruing Greater Than 90 Days
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0	$ 0
PCD Loans | Paycheck Protection Program
Financing Receivable, Past Due [Line Items]
Loans	$ 0