Loans - Past Due Financing Receivables (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Financing Receivable, Past Due [Line Items]
Loans	$ 5,437,049	$ 5,735,349
Nonaccrual	32,920	36,110
Portfolio Loans
Financing Receivable, Past Due [Line Items]
Loans	4,641,153	4,711,737
Nonaccrual	19,024	18,270
Current
Financing Receivable, Past Due [Line Items]
Loans	5,394,940	5,689,158
Current | Portfolio Loans
Financing Receivable, Past Due [Line Items]
Loans	4,618,483	4,685,456
Accruing 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	6,265	6,382
Accruing 30-59 Days Past Due | Portfolio Loans
Financing Receivable, Past Due [Line Items]
Loans	3,561	4,416
Accruing 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	2,585	3,636
Accruing 60-89 Days Past Due | Portfolio Loans
Financing Receivable, Past Due [Line Items]
Loans	85	3,532
Accruing Greater Than 90 Days
Financing Receivable, Past Due [Line Items]
Loans	339	63
Accruing Greater Than 90 Days | Portfolio Loans
Financing Receivable, Past Due [Line Items]
Loans	0	63
Construction and land development
Financing Receivable, Past Due [Line Items]
Loans	234,347	245,108
Nonaccrual	71	167
Construction and land development | Portfolio Loans
Financing Receivable, Past Due [Line Items]
Loans	223,412	216,420
Nonaccrual	64	158
Construction and land development | Current | Portfolio Loans
Financing Receivable, Past Due [Line Items]
Loans	223,348	216,262
Construction and land development | Accruing 30-59 Days Past Due | Portfolio Loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Construction and land development | Accruing 60-89 Days Past Due | Portfolio Loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Construction and land development | Accruing Greater Than 90 Days | Portfolio Loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Commercial real estate - owner-occupied
Financing Receivable, Past Due [Line Items]
Loans	1,127,640	1,141,310
Nonaccrual	5,390	8,181
Commercial real estate - owner-occupied | Portfolio Loans
Financing Receivable, Past Due [Line Items]
Loans	889,221	854,769
Nonaccrual	1,955	2,471
Commercial real estate - owner-occupied | Current | Portfolio Loans
Financing Receivable, Past Due [Line Items]
Loans	887,266	851,222
Commercial real estate - owner-occupied | Accruing 30-59 Days Past Due | Portfolio Loans
Financing Receivable, Past Due [Line Items]
Loans	0	1,076
Commercial real estate - owner-occupied | Accruing 60-89 Days Past Due | Portfolio Loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Commercial real estate - owner-occupied | Accruing Greater Than 90 Days | Portfolio Loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Commercial real estate - non owner-occupied
Financing Receivable, Past Due [Line Items]
Loans	1,412,439	1,395,854
Nonaccrual	7,117	8,084
Commercial real estate - non owner-occupied | Portfolio Loans
Financing Receivable, Past Due [Line Items]
Loans	1,112,290	1,043,459
Nonaccrual	1,421	2,153
Commercial real estate - non owner-occupied | Current | Portfolio Loans
Financing Receivable, Past Due [Line Items]
Loans	1,110,608	1,041,306
Commercial real estate - non owner-occupied | Accruing 30-59 Days Past Due | Portfolio Loans
Financing Receivable, Past Due [Line Items]
Loans	261	0
Commercial real estate - non owner-occupied | Accruing 60-89 Days Past Due | Portfolio Loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Commercial real estate - non owner-occupied | Accruing Greater Than 90 Days | Portfolio Loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Residential real estate
Financing Receivable, Past Due [Line Items]
Loans	1,226,536	1,342,628
Nonaccrual	14,415	12,492
Residential real estate | Portfolio Loans
Financing Receivable, Past Due [Line Items]
Loans	1,087,313	1,155,914
Nonaccrual	10,899	8,531
Residential real estate | Current | Portfolio Loans
Financing Receivable, Past Due [Line Items]
Loans	1,076,165	1,142,893
Residential real estate | Accruing 30-59 Days Past Due | Portfolio Loans
Financing Receivable, Past Due [Line Items]
Loans	199	3,002
Residential real estate | Accruing 60-89 Days Past Due | Portfolio Loans
Financing Receivable, Past Due [Line Items]
Loans	50	1,427
Residential real estate | Accruing Greater Than 90 Days | Portfolio Loans
Financing Receivable, Past Due [Line Items]
Loans	0	61
Commercial and financial
Financing Receivable, Past Due [Line Items]
Loans	900,206	854,753
Nonaccrual	5,793	6,604
Commercial and financial | Portfolio Loans
Financing Receivable, Past Due [Line Items]
Loans	811,580	743,846
Nonaccrual	4,551	4,382
Commercial and financial | Current | Portfolio Loans
Financing Receivable, Past Due [Line Items]
Loans	804,139	737,362
Commercial and financial | Accruing 30-59 Days Past Due | Portfolio Loans
Financing Receivable, Past Due [Line Items]
Loans	2,890	135
Commercial and financial | Accruing 60-89 Days Past Due | Portfolio Loans
Financing Receivable, Past Due [Line Items]
Loans	0	1,967
Commercial and financial | Accruing Greater Than 90 Days | Portfolio Loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Consumer
Financing Receivable, Past Due [Line Items]
Loans	171,769	188,735
Nonaccrual	134	582
Consumer | Portfolio Loans
Financing Receivable, Past Due [Line Items]
Loans	166,806	181,797
Nonaccrual	134	575
Consumer | Current | Portfolio Loans
Financing Receivable, Past Due [Line Items]
Loans	166,426	180,879
Consumer | Accruing 30-59 Days Past Due | Portfolio Loans
Financing Receivable, Past Due [Line Items]
Loans	211	203
Consumer | Accruing 60-89 Days Past Due | Portfolio Loans
Financing Receivable, Past Due [Line Items]
Loans	35	138
Consumer | Accruing Greater Than 90 Days | Portfolio Loans
Financing Receivable, Past Due [Line Items]
Loans	0	2
Paycheck Protection Program
Financing Receivable, Past Due [Line Items]
Loans	364,112	566,961
Paycheck Protection Program | Portfolio Loans
Financing Receivable, Past Due [Line Items]
Loans	350,531	515,532
Nonaccrual	0	0
Paycheck Protection Program | Current | Portfolio Loans
Financing Receivable, Past Due [Line Items]
Loans	350,531	515,532
Paycheck Protection Program | Accruing 30-59 Days Past Due | Portfolio Loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Paycheck Protection Program | Accruing 60-89 Days Past Due | Portfolio Loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Paycheck Protection Program | Accruing Greater Than 90 Days | Portfolio Loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Acquired Non-PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	713,933	925,434
Nonaccrual	5,599	7,690
Acquired Non-PCD Loans | Current
Financing Receivable, Past Due [Line Items]
Loans	704,545	915,799
Acquired Non-PCD Loans | Accruing 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	1,381	1,841
Acquired Non-PCD Loans | Accruing 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	2,069	104
Acquired Non-PCD Loans | Accruing Greater Than 90 Days
Financing Receivable, Past Due [Line Items]
Loans	339	0
Acquired Non-PCD Loans | Construction and land development
Financing Receivable, Past Due [Line Items]
Loans	10,408	26,250
Nonaccrual	0	0
Acquired Non-PCD Loans | Construction and land development | Current
Financing Receivable, Past Due [Line Items]
Loans	10,408	26,250
Acquired Non-PCD Loans | Construction and land development | Accruing 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	0	0
Acquired Non-PCD Loans | Construction and land development | Accruing 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	0	0
Acquired Non-PCD Loans | Construction and land development | Accruing Greater Than 90 Days
Financing Receivable, Past Due [Line Items]
Loans	0	0
Acquired Non-PCD Loans | Commercial real estate - owner-occupied
Financing Receivable, Past Due [Line Items]
Loans	203,847	247,090
Nonaccrual	620	2,604
Acquired Non-PCD Loans | Commercial real estate - owner-occupied | Current
Financing Receivable, Past Due [Line Items]
Loans	202,269	244,486
Acquired Non-PCD Loans | Commercial real estate - owner-occupied | Accruing 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	958	0
Acquired Non-PCD Loans | Commercial real estate - owner-occupied | Accruing 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	0	0
Acquired Non-PCD Loans | Commercial real estate - owner-occupied | Accruing Greater Than 90 Days
Financing Receivable, Past Due [Line Items]
Loans	0	0
Acquired Non-PCD Loans | Commercial real estate - non owner-occupied
Financing Receivable, Past Due [Line Items]
Loans	274,772	323,273
Nonaccrual	1,827	1,009
Acquired Non-PCD Loans | Commercial real estate - non owner-occupied | Current
Financing Receivable, Past Due [Line Items]
Loans	272,945	322,264
Acquired Non-PCD Loans | Commercial real estate - non owner-occupied | Accruing 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	0	0
Acquired Non-PCD Loans | Commercial real estate - non owner-occupied | Accruing 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	0	0
Acquired Non-PCD Loans | Commercial real estate - non owner-occupied | Accruing Greater Than 90 Days
Financing Receivable, Past Due [Line Items]
Loans	0	0
Acquired Non-PCD Loans | Residential real estate
Financing Receivable, Past Due [Line Items]
Loans	131,131	176,105
Nonaccrual	2,481	2,889
Acquired Non-PCD Loans | Residential real estate | Current
Financing Receivable, Past Due [Line Items]
Loans	128,579	171,507
Acquired Non-PCD Loans | Residential real estate | Accruing 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	0	1,605
Acquired Non-PCD Loans | Residential real estate | Accruing 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	71	104
Acquired Non-PCD Loans | Residential real estate | Accruing Greater Than 90 Days
Financing Receivable, Past Due [Line Items]
Loans	0	0
Acquired Non-PCD Loans | Commercial and financial
Financing Receivable, Past Due [Line Items]
Loans	75,245	94,627
Nonaccrual	671	1,188
Acquired Non-PCD Loans | Commercial and financial | Current
Financing Receivable, Past Due [Line Items]
Loans	71,814	93,223
Acquired Non-PCD Loans | Commercial and financial | Accruing 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	423	216
Acquired Non-PCD Loans | Commercial and financial | Accruing 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	1,998	0
Acquired Non-PCD Loans | Commercial and financial | Accruing Greater Than 90 Days
Financing Receivable, Past Due [Line Items]
Loans	339	0
Acquired Non-PCD Loans | Consumer
Financing Receivable, Past Due [Line Items]
Loans	4,949	6,660
Nonaccrual	0	0
Acquired Non-PCD Loans | Consumer | Current
Financing Receivable, Past Due [Line Items]
Loans	4,949	6,640
Acquired Non-PCD Loans | Consumer | Accruing 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	0	20
Acquired Non-PCD Loans | Consumer | Accruing 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	0	0
Acquired Non-PCD Loans | Consumer | Accruing Greater Than 90 Days
Financing Receivable, Past Due [Line Items]
Loans	0	0
Acquired Non-PCD Loans | Paycheck Protection Program
Financing Receivable, Past Due [Line Items]
Loans	13,581	51,429
Nonaccrual	0	0
Acquired Non-PCD Loans | Paycheck Protection Program | Current
Financing Receivable, Past Due [Line Items]
Loans	13,581	51,429
Acquired Non-PCD Loans | Paycheck Protection Program | Accruing 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	0	0
Acquired Non-PCD Loans | Paycheck Protection Program | Accruing 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	0	0
Acquired Non-PCD Loans | Paycheck Protection Program | Accruing Greater Than 90 Days
Financing Receivable, Past Due [Line Items]
Loans	0	0
PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	81,963	98,178
Nonaccrual	8,297	10,150
PCD Loans | Current
Financing Receivable, Past Due [Line Items]
Loans	71,912	87,903
PCD Loans | Accruing 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	1,323	125
PCD Loans | Accruing 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	431	0
PCD Loans | Accruing Greater Than 90 Days
Financing Receivable, Past Due [Line Items]
Loans	0	0
PCD Loans | Construction and land development
Financing Receivable, Past Due [Line Items]
Loans	527	2,438
Nonaccrual	7	9
PCD Loans | Construction and land development | Current
Financing Receivable, Past Due [Line Items]
Loans	520	2,429
PCD Loans | Construction and land development | Accruing 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	0	0
PCD Loans | Construction and land development | Accruing 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	0	0
PCD Loans | Construction and land development | Accruing Greater Than 90 Days
Financing Receivable, Past Due [Line Items]
Loans	0	0
PCD Loans | Commercial real estate - owner-occupied
Financing Receivable, Past Due [Line Items]
Loans	34,572	39,451
Nonaccrual	2,815	3,106
PCD Loans | Commercial real estate - owner-occupied | Current
Financing Receivable, Past Due [Line Items]
Loans	30,673	36,345
PCD Loans | Commercial real estate - owner-occupied | Accruing 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	1,084	0
PCD Loans | Commercial real estate - owner-occupied | Accruing 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	0	0
PCD Loans | Commercial real estate - owner-occupied | Accruing Greater Than 90 Days
Financing Receivable, Past Due [Line Items]
Loans	0	0
PCD Loans | Commercial real estate - non owner-occupied
Financing Receivable, Past Due [Line Items]
Loans	25,377	29,122
Nonaccrual	3,869	4,922
PCD Loans | Commercial real estate - non owner-occupied | Current
Financing Receivable, Past Due [Line Items]
Loans	21,508	24,200
PCD Loans | Commercial real estate - non owner-occupied | Accruing 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	0	0
PCD Loans | Commercial real estate - non owner-occupied | Accruing 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	0	0
PCD Loans | Commercial real estate - non owner-occupied | Accruing Greater Than 90 Days
Financing Receivable, Past Due [Line Items]
Loans	0	0
PCD Loans | Residential real estate
Financing Receivable, Past Due [Line Items]
Loans	8,092	10,609
Nonaccrual	1,035	1,072
PCD Loans | Residential real estate | Current
Financing Receivable, Past Due [Line Items]
Loans	6,555	9,537
PCD Loans | Residential real estate | Accruing 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	71	0
PCD Loans | Residential real estate | Accruing 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	431	0
PCD Loans | Residential real estate | Accruing Greater Than 90 Days
Financing Receivable, Past Due [Line Items]
Loans	0	0
PCD Loans | Commercial and financial
Financing Receivable, Past Due [Line Items]
Loans	13,381	16,280
Nonaccrual	571	1,034
PCD Loans | Commercial and financial | Current
Financing Receivable, Past Due [Line Items]
Loans	12,642	15,121
PCD Loans | Commercial and financial | Accruing 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	168	125
PCD Loans | Commercial and financial | Accruing 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	0	0
PCD Loans | Commercial and financial | Accruing Greater Than 90 Days
Financing Receivable, Past Due [Line Items]
Loans	0	0
PCD Loans | Consumer
Financing Receivable, Past Due [Line Items]
Loans	14	278
Nonaccrual	0	7
PCD Loans | Consumer | Current
Financing Receivable, Past Due [Line Items]
Loans	14	271
PCD Loans | Consumer | Accruing 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	0	0
PCD Loans | Consumer | Accruing 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	0	0
PCD Loans | Consumer | Accruing Greater Than 90 Days
Financing Receivable, Past Due [Line Items]
Loans	0	0
PCD Loans | Paycheck Protection Program
Financing Receivable, Past Due [Line Items]
Loans	$ 0	$ 0