Loans and Leases - Credit Quality (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Financing Receivable, Credit Quality Indicator [Line Items]
2021	$ 1,045,657	$ 2,001,595
2020	1,239,863	723,898
2019	638,818	395,275
2018	301,443	362,654
2017	290,876	205,604
Prior	301,164	254,149
Revolving loans amortized cost basis	537,568	516,936
Total	4,355,389	4,460,111
Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2021	1,040,134	1,966,242
2020	1,190,994	707,620
2019	607,035	390,152
2018	275,429	350,602
2017	287,503	201,130
Prior	284,802	238,726
Revolving loans amortized cost basis	515,774	499,565
Total	4,201,671	4,354,037
Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
2021	5,523	31,522
2020	16,798	10,859
2019	28,348	4,002
2018	23,861	577
2017	1,480	2,202
Prior	8,163	7,144
Revolving loans amortized cost basis	15,932	9,565
Total	100,105	65,871
Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	3,831
2020	32,071	5,419
2019	3,435	1,121
2018	2,153	11,475
2017	1,893	2,272
Prior	8,199	8,279
Revolving loans amortized cost basis	5,862	7,806
Total	53,613	40,203
Nonperforming Financial Instruments [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2021	77	678
2020	659	182
2019	66	259
2018	565	205
2017	5	7
Prior	1,188	1,431
Revolving loans amortized cost basis	525	1,028
Total	3,085	3,790
Performing Financial Instruments [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2021	235,948	267,150
2020	230,838	110,092
2019	72,569	88,792
2018	47,960	64,197
2017	33,415	43,329
Prior	99,141	89,160
Revolving loans amortized cost basis	173,700	180,220
Total	893,571	842,940
Commercial Financial And Agricultural [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2021	148,549	165,270
2020	106,679	95,180
2019	77,831	75,400
2018	56,203	39,434
2017	26,361	18,148
Prior	55,379	57,824
Revolving loans amortized cost basis	456,013	441,409
Total	927,015	892,665
Commercial Financial And Agricultural [Member] | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2021	148,549	162,547
2020	101,422	93,967
2019	75,241	74,722
2018	55,694	38,906
2017	25,859	17,371
Prior	53,712	56,053
Revolving loans amortized cost basis	436,226	427,336
Total	896,703	870,902
Commercial Financial And Agricultural [Member] | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	2,723
2020	5,257	783
2019	2,560	316
2018	440	500
2017	487	777
Prior	1,372	1,144
Revolving loans amortized cost basis	14,609	8,318
Total	24,725	14,561
Commercial Financial And Agricultural [Member] | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	0
2020	0	430
2019	30	362
2018	69	28
2017	15	0
Prior	295	627
Revolving loans amortized cost basis	5,178	5,755
Total	5,587	7,202
Paycheck Protection Program Loans
Financing Receivable, Credit Quality Indicator [Line Items]
2021	80,766	483,773
2020	4,835	0
2019	0	0
2018	0	0
2017	0	0
Prior	0	0
Revolving loans amortized cost basis	0	0
Total	85,601	483,773
Paycheck Protection Program Loans | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2021	80,766	483,773
2020	4,835	0
2019	0	0
2018	0	0
2017	0	0
Prior	0	0
Revolving loans amortized cost basis	0	0
Total	85,601	483,773
Paycheck Protection Program Loans | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	0
2020	0	0
2019	0	0
2018	0	0
2017	0	0
Prior	0	0
Revolving loans amortized cost basis	0	0
Total	0	0
Paycheck Protection Program Loans | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	0
2020	0	0
2019	0	0
2018	0	0
2017	0	0
Prior	0	0
Revolving loans amortized cost basis	0	0
Total	0	0
Real-Estate Commercial [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2021	584,932	1,094,180
2020	969,401	496,071
2019	457,283	227,853
2018	172,684	279,619
2017	232,320	145,498
Prior	208,535	170,063
Revolving loans amortized cost basis	44,743	45,588
Total	2,669,898	2,458,872
Real-Estate Commercial [Member] | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2021	582,442	1,084,157
2020	927,367	481,997
2019	428,304	223,646
2018	167,225	268,236
2017	229,552	143,041
Prior	197,290	157,503
Revolving loans amortized cost basis	43,313	43,008
Total	2,575,493	2,401,588
Real-Estate Commercial [Member] | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
2021	2,490	6,220
2020	9,963	10,076
2019	25,574	3,498
2018	3,421	0
2017	919	1,250
Prior	5,691	5,870
Revolving loans amortized cost basis	1,323	1,247
Total	49,381	28,161
Real-Estate Commercial [Member] | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	3,803
2020	32,071	3,998
2019	3,405	709
2018	2,038	11,383
2017	1,849	1,207
Prior	5,554	6,690
Revolving loans amortized cost basis	107	1,333
Total	45,024	29,123
Real-Estate Construction [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2021	100,190	138,065
2020	66,937	59,507
2019	47,603	39,009
2018	36,330	113
2017	198	2,950
Prior	0	0
Revolving loans amortized cost basis	9,616	3,711
Total	260,874	243,355
Real-Estate Construction [Member] | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2021	97,157	116,840
2020	66,437	59,507
2019	47,603	39,009
2018	16,330	113
2017	198	2,950
Prior	0	0
Revolving loans amortized cost basis	9,616	3,711
Total	237,341	222,130
Real-Estate Construction [Member] | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
2021	3,033	21,225
2020	500	0
2019	0	0
2018	20,000	0
2017	0	0
Prior	0	0
Revolving loans amortized cost basis	0	0
Total	23,533	21,225
Real-Estate Construction [Member] | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	0
2020	0	0
2019	0	0
2018	0	0
2017	0	0
Prior	0	0
Revolving loans amortized cost basis	0	0
Total	0	0
Real Estate Residential Secured For Business Purpose [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2021	131,220	120,307
2020	92,011	73,140
2019	56,101	53,013
2018	36,226	43,488
2017	31,997	39,008
Prior	37,250	26,262
Revolving loans amortized cost basis	27,196	26,228
Total	412,001	381,446
Real Estate Residential Secured For Business Purpose [Member] | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2021	131,220	118,925
2020	90,933	72,149
2019	55,887	52,775
2018	36,180	43,347
2017	31,894	37,768
Prior	33,800	25,170
Revolving loans amortized cost basis	26,619	25,510
Total	406,533	375,644
Real Estate Residential Secured For Business Purpose [Member] | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	1,354
2020	1,078	0
2019	214	188
2018	0	77
2017	74	175
Prior	1,100	130
Revolving loans amortized cost basis	0	0
Total	2,466	1,924
Real Estate Residential Secured For Business Purpose [Member] | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	28
2020	0	991
2019	0	50
2018	46	64
2017	29	1,065
Prior	2,350	962
Revolving loans amortized cost basis	577	718
Total	3,002	3,878
Real Estate Residential Secured For Personal Purpose [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2021	174,298	192,653
2020	172,284	61,880
2019	38,776	56,370
2018	27,946	50,983
2017	26,533	38,975
Prior	95,653	85,502
Revolving loans amortized cost basis	215	1,237
Total	535,705	487,600
Real Estate Residential Secured For Personal Purpose [Member] | Nonperforming Financial Instruments [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2021	54	666
2020	643	0
2019	0	56
2018	371	0
2017	0	0
Prior	1,011	1,364
Revolving loans amortized cost basis	0	0
Total	2,079	2,086
Real Estate Residential Secured For Personal Purpose [Member] | Performing Financial Instruments [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2021	174,244	191,987
2020	171,641	61,880
2019	38,776	56,314
2018	27,575	50,983
2017	26,533	38,975
Prior	94,642	84,138
Revolving loans amortized cost basis	215	1,237
Total	533,626	485,514
Real Estate Home Equity Secured For Personal Purpose [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2021	641	1,195
2020	953	815
2019	478	1,027
2018	696	1,160
2017	887	518
Prior	1,876	2,225
Revolving loans amortized cost basis	153,498	159,669
Total	159,029	166,609
Real Estate Home Equity Secured For Personal Purpose [Member] | Nonperforming Financial Instruments [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	0
2020	0	0
2019	0	198
2018	182	0
2017	0	0
Prior	65	36
Revolving loans amortized cost basis	525	866
Total	772	1,100
Real Estate Home Equity Secured For Personal Purpose [Member] | Performing Financial Instruments [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2021	641	1,195
2020	953	815
2019	478	829
2018	514	1,160
2017	887	518
Prior	1,811	2,189
Revolving loans amortized cost basis	152,973	158,803
Total	158,257	165,509
Loans to Individuals [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2021	1,337	1,795
2020	1,019	1,425
2019	850	970
2018	543	441
2017	157	220
Prior	2,040	2,289
Revolving loans amortized cost basis	20,512	20,342
Total	26,458	27,482
Loans to Individuals [Member] | Nonperforming Financial Instruments [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	0
2020	0	0
2019	0	0
2018	0	0
2017	0	0
Prior	58	23
Revolving loans amortized cost basis	0	162
Total	58	185
Loans to Individuals [Member] | Performing Financial Instruments [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2021	1,337	1,795
2020	1,019	1,425
2019	850	970
2018	543	441
2017	157	220
Prior	1,982	2,266
Revolving loans amortized cost basis	20,512	20,180
Total	26,400	27,297
Lease Financings [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2021	59,749	72,185
2020	16	46,154
2019	32,531	30,684
2018	19,340	11,818
2017	5,843	3,623
Prior	760	575
Revolving loans amortized cost basis	0	0
Total	175,464	165,039
Lease Financings [Member] | Nonperforming Financial Instruments [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2021	23	12
2020	16	182
2019	66	5
2018	12	205
2017	5	7
Prior	54	8
Revolving loans amortized cost basis	0	0
Total	176	419
Lease Financings [Member] | Performing Financial Instruments [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2021	59,726	72,173
2020	57,225	45,972
2019	32,465	30,679
2018	19,328	11,613
2017	5,838	3,616
Prior	706	567
Revolving loans amortized cost basis	0	0
Total	$ 175,288	$ 164,620