Loans - Risk Categories of Loans by Class of Loans (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	$ 793,394	$ 1,309,434
One year prior to current fiscal year	842,920	912,701
Two years prior to current fiscal year	792,569	779,840
Three years prior to current fiscal year	641,023	589,022
Four years prior to current fiscal year	482,792	582,417
Prior	1,288,244	928,105
Revolving	596,107	633,830
Total	5,437,049	5,735,349
Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	793,394	1,302,389
One year prior to current fiscal year	824,893	898,213
Two years prior to current fiscal year	777,949	741,734
Three years prior to current fiscal year	610,606	562,336
Four years prior to current fiscal year	453,299	553,531
Prior	1,237,625	885,576
Revolving	589,856	628,070
Total	5,287,622	5,571,849
Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	6,108
One year prior to current fiscal year	17,120	3,507
Two years prior to current fiscal year	3,076	19,722
Three years prior to current fiscal year	14,138	13,953
Four years prior to current fiscal year	16,854	14,820
Prior	15,499	7,235
Revolving	2,681	2,544
Total	69,368	67,889
Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	504
One year prior to current fiscal year	411	41
Two years prior to current fiscal year	0	12,725
Three years prior to current fiscal year	12,233	7,256
Four years prior to current fiscal year	5,188	10,823
Prior	16,627	14,083
Revolving	1,167	1,092
Total	35,626	46,524
Substandard Impaired
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	433
One year prior to current fiscal year	496	10,940
Two years prior to current fiscal year	11,544	5,659
Three years prior to current fiscal year	4,046	5,477
Four years prior to current fiscal year	7,451	3,243
Prior	18,493	21,211
Revolving	2,403	2,104
Total	44,433	49,067
Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	0
One year prior to current fiscal year	0	0
Two years prior to current fiscal year	0	0
Three years prior to current fiscal year	0	0
Four years prior to current fiscal year	0	0
Prior	0	0
Revolving	0	20
Total	0	20
Construction and land development
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	37,114	62,313
One year prior to current fiscal year	55,457	52,629
Two years prior to current fiscal year	42,341	51,985
Three years prior to current fiscal year	28,740	15,910
Four years prior to current fiscal year	6,363	7,335
Prior	23,676	19,612
Revolving	40,656	35,324
Total	234,347	245,108
Construction and land development | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	37,114	62,107
One year prior to current fiscal year	55,457	52,384
Two years prior to current fiscal year	41,969	46,067
Three years prior to current fiscal year	26,223	15,873
Four years prior to current fiscal year	6,326	7,335
Prior	23,567	17,873
Revolving	40,656	35,324
Total	231,312	236,963
Construction and land development | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	206
One year prior to current fiscal year	0	245
Two years prior to current fiscal year	372	5,918
Three years prior to current fiscal year	2,517	0
Four years prior to current fiscal year	0	0
Prior	0	1,449
Revolving	0	0
Total	2,889	7,818
Construction and land development | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	0
One year prior to current fiscal year	0	0
Two years prior to current fiscal year	0	0
Three years prior to current fiscal year	0	0
Four years prior to current fiscal year	0	0
Prior	17	51
Revolving	0	0
Total	17	51
Construction and land development | Substandard Impaired
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	0
One year prior to current fiscal year	0	0
Two years prior to current fiscal year	0	0
Three years prior to current fiscal year	0	37
Four years prior to current fiscal year	37	0
Prior	92	239
Revolving	0	0
Total	129	276
Construction and land development | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	0
One year prior to current fiscal year	0	0
Two years prior to current fiscal year	0	0
Three years prior to current fiscal year	0	0
Four years prior to current fiscal year	0	0
Prior	0	0
Revolving	0	0
Total	0	0
Commercial real estate - owner-occupied
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	87,486	161,726
One year prior to current fiscal year	156,512	203,568
Two years prior to current fiscal year	187,741	160,328
Three years prior to current fiscal year	143,798	144,412
Four years prior to current fiscal year	135,263	154,815
Prior	404,822	302,204
Revolving	12,018	14,257
Total	1,127,640	1,141,310
Commercial real estate - owner-occupied | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	87,486	155,953
One year prior to current fiscal year	145,245	198,559
Two years prior to current fiscal year	184,017	156,276
Three years prior to current fiscal year	141,827	138,341
Four years prior to current fiscal year	130,013	148,389
Prior	393,389	287,772
Revolving	12,018	14,255
Total	1,093,995	1,099,545
Commercial real estate - owner-occupied | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	5,773
One year prior to current fiscal year	11,267	1,858
Two years prior to current fiscal year	841	3,305
Three years prior to current fiscal year	1,286	0
Four years prior to current fiscal year	0	4,471
Prior	5,287	4,050
Revolving	0	2
Total	18,681	19,459
Commercial real estate - owner-occupied | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	0
One year prior to current fiscal year	0	0
Two years prior to current fiscal year	0	0
Three years prior to current fiscal year	0	4,709
Four years prior to current fiscal year	3,805	1,955
Prior	4,356	5,508
Revolving	0	0
Total	8,161	12,172
Commercial real estate - owner-occupied | Substandard Impaired
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	0
One year prior to current fiscal year	0	3,151
Two years prior to current fiscal year	2,883	747
Three years prior to current fiscal year	685	1,362
Four years prior to current fiscal year	1,445	0
Prior	1,790	4,874
Revolving	0	0
Total	6,803	10,134
Commercial real estate - owner-occupied | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	0
One year prior to current fiscal year	0	0
Two years prior to current fiscal year	0	0
Three years prior to current fiscal year	0	0
Four years prior to current fiscal year	0	0
Prior	0	0
Revolving	0	0
Total	0	0
Commercial real estate - non owner-occupied
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	121,245	159,299
One year prior to current fiscal year	159,336	316,136
Two years prior to current fiscal year	295,698	220,308
Three years prior to current fiscal year	202,573	130,937
Four years prior to current fiscal year	117,409	194,299
Prior	508,160	366,279
Revolving	8,018	8,596
Total	1,412,439	1,395,854
Commercial real estate - non owner-occupied | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	121,245	159,299
One year prior to current fiscal year	159,336	313,287
Two years prior to current fiscal year	292,367	201,112
Three years prior to current fiscal year	183,456	123,357
Four years prior to current fiscal year	100,887	175,623
Prior	484,963	356,943
Revolving	8,018	8,596
Total	1,350,272	1,338,217
Commercial real estate - non owner-occupied | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	0
One year prior to current fiscal year	0	431
Two years prior to current fiscal year	953	9,487
Three years prior to current fiscal year	9,399	7,580
Four years prior to current fiscal year	16,522	10,240
Prior	9,931	114
Revolving	0	0
Total	36,805	27,852
Commercial real estate - non owner-occupied | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	0
One year prior to current fiscal year	0	0
Two years prior to current fiscal year	0	9,709
Three years prior to current fiscal year	9,718	0
Four years prior to current fiscal year	0	8,311
Prior	8,528	3,682
Revolving	0	0
Total	18,246	21,702
Commercial real estate - non owner-occupied | Substandard Impaired
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	0
One year prior to current fiscal year	0	2,418
Two years prior to current fiscal year	2,378	0
Three years prior to current fiscal year	0	0
Four years prior to current fiscal year	0	125
Prior	4,738	5,540
Revolving	0	0
Total	7,116	8,083
Commercial real estate - non owner-occupied | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	0
One year prior to current fiscal year	0	0
Two years prior to current fiscal year	0	0
Three years prior to current fiscal year	0	0
Four years prior to current fiscal year	0	0
Prior	0	0
Revolving	0	0
Total	0	0
Residential real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	129,061	97,278
One year prior to current fiscal year	107,617	145,055
Two years prior to current fiscal year	106,671	205,630
Three years prior to current fiscal year	149,627	208,424
Four years prior to current fiscal year	158,313	161,327
Prior	251,527	171,831
Revolving	323,720	353,083
Total	1,226,536	1,342,628
Residential real estate | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	129,061	96,819
One year prior to current fiscal year	107,121	144,329
Two years prior to current fiscal year	105,930	204,077
Three years prior to current fiscal year	149,520	205,046
Four years prior to current fiscal year	153,851	160,612
Prior	241,216	159,742
Revolving	320,702	350,502
Total	1,207,401	1,321,127
Residential real estate | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	0
One year prior to current fiscal year	0	0
Two years prior to current fiscal year	0	33
Three years prior to current fiscal year	30	720
Four years prior to current fiscal year	0	0
Prior	218	966
Revolving	221	479
Total	469	2,198
Residential real estate | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	350
One year prior to current fiscal year	0	0
Two years prior to current fiscal year	0	0
Three years prior to current fiscal year	0	896
Four years prior to current fiscal year	0	0
Prior	214	1,452
Revolving	486	100
Total	700	2,798
Residential real estate | Substandard Impaired
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	109
One year prior to current fiscal year	496	726
Two years prior to current fiscal year	741	1,520
Three years prior to current fiscal year	77	1,762
Four years prior to current fiscal year	4,462	715
Prior	9,879	9,671
Revolving	2,311	2,002
Total	17,966	16,505
Residential real estate | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	0
One year prior to current fiscal year	0	0
Two years prior to current fiscal year	0	0
Three years prior to current fiscal year	0	0
Four years prior to current fiscal year	0	0
Prior	0	0
Revolving	0	0
Total	0	0
Commercial and financial
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	148,832	215,316
One year prior to current fiscal year	207,706	152,093
Two years prior to current fiscal year	126,567	110,949
Three years prior to current fiscal year	93,788	70,295
Four years prior to current fiscal year	51,451	42,386
Prior	76,111	58,336
Revolving	195,751	205,378
Total	900,206	854,753
Commercial and financial | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	148,832	214,774
One year prior to current fiscal year	201,500	146,511
Two years prior to current fiscal year	120,225	103,769
Three years prior to current fiscal year	87,159	60,782
Four years prior to current fiscal year	48,385	39,692
Prior	70,755	53,758
Revolving	194,503	204,304
Total	871,359	823,590
Commercial and financial | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	71
One year prior to current fiscal year	5,795	946
Two years prior to current fiscal year	864	965
Three years prior to current fiscal year	891	5,612
Four years prior to current fiscal year	270	67
Prior	33	635
Revolving	1,130	209
Total	8,983	8,505
Commercial and financial | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	154
One year prior to current fiscal year	411	41
Two years prior to current fiscal year	0	3,016
Three years prior to current fiscal year	2,480	1,609
Four years prior to current fiscal year	1,369	553
Prior	3,512	3,239
Revolving	26	764
Total	7,798	9,376
Commercial and financial | Substandard Impaired
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	317
One year prior to current fiscal year	0	4,595
Two years prior to current fiscal year	5,478	3,199
Three years prior to current fiscal year	3,258	2,292
Four years prior to current fiscal year	1,427	2,074
Prior	1,811	704
Revolving	92	81
Total	12,066	13,262
Commercial and financial | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	0
One year prior to current fiscal year	0	0
Two years prior to current fiscal year	0	0
Three years prior to current fiscal year	0	0
Four years prior to current fiscal year	0	0
Prior	0	0
Revolving	0	20
Total	0	20
Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	23,549	46,541
One year prior to current fiscal year	38,287	43,220
Two years prior to current fiscal year	33,551	30,640
Three years prior to current fiscal year	22,497	19,044
Four years prior to current fiscal year	13,993	22,255
Prior	23,948	9,843
Revolving	15,944	17,192
Total	171,769	188,735
Consumer | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	23,549	46,476
One year prior to current fiscal year	38,229	43,143
Two years prior to current fiscal year	33,441	30,433
Three years prior to current fiscal year	22,421	18,937
Four years prior to current fiscal year	13,837	21,880
Prior	23,735	9,488
Revolving	13,959	15,089
Total	169,171	185,446
Consumer | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	58
One year prior to current fiscal year	58	27
Two years prior to current fiscal year	46	14
Three years prior to current fiscal year	15	41
Four years prior to current fiscal year	62	42
Prior	30	21
Revolving	1,330	1,854
Total	1,541	2,057
Consumer | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	0
One year prior to current fiscal year	0	0
Two years prior to current fiscal year	0	0
Three years prior to current fiscal year	35	42
Four years prior to current fiscal year	14	4
Prior	0	151
Revolving	655	228
Total	704	425
Consumer | Substandard Impaired
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	7
One year prior to current fiscal year	0	50
Two years prior to current fiscal year	64	193
Three years prior to current fiscal year	26	24
Four years prior to current fiscal year	80	329
Prior	183	183
Revolving	0	21
Total	353	807
Consumer | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	0
One year prior to current fiscal year	0	0
Two years prior to current fiscal year	0	0
Three years prior to current fiscal year	0	0
Four years prior to current fiscal year	0	0
Prior	0	0
Revolving	0	0
Total	0	0
Paycheck Protection Program
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	246,107	566,961
One year prior to current fiscal year	118,005	0
Two years prior to current fiscal year	0	0
Three years prior to current fiscal year	0	0
Four years prior to current fiscal year	0	0
Prior	0	0
Revolving	0	0
Total	364,112	566,961
Paycheck Protection Program | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	246,107	566,961
One year prior to current fiscal year	118,005	0
Two years prior to current fiscal year	0	0
Three years prior to current fiscal year	0	0
Four years prior to current fiscal year	0	0
Prior	0	0
Revolving	0	0
Total	$ 364,112	$ 566,961