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Loans and Allowance for Credit Losses - Summary of Amortized Cost Balance of Each of Loan Classes Disaggregated by Collateral Type and Origination Year (Detail) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2022	$ 2,862,677	$ 5,779,727
Amortized Cost Basis by Origination Year 2021	5,159,926	3,516,428
Amortized Cost Basis by Origination Year 2020	2,925,003	1,605,604
Amortized Cost Basis by Origination Year 2019	1,280,145	633,731
Amortized Cost Basis by Origination Year 2018	476,588	435,695
Amortized Cost Basis by Origination Year Prior to 2018	874,954	705,980
Amortized Cost - Revolving Loans	5,375,789	4,489,817
Amortized Cost - Revolving Loans Converted to Term Loans	17,076	3,889
Total Loans	18,972,158	17,170,871
Commercial and Industrial Portfolio [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2022	1,292,997	2,412,187
Amortized Cost Basis by Origination Year 2021	1,805,024	951,267
Amortized Cost Basis by Origination Year 2020	755,072	359,656
Amortized Cost Basis by Origination Year 2019	301,437	151,532
Amortized Cost Basis by Origination Year 2018	117,197	115,915
Amortized Cost Basis by Origination Year Prior to 2018	110,804	133,043
Amortized Cost - Revolving Loans	3,913,462	3,134,273
Amortized Cost - Revolving Loans Converted to Term Loans	12,861	247
Total Loans	8,308,854	7,258,120
Commercial and Industrial Portfolio [Member] | Equipment/Accounts Receivable/Inventory [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2022	1,280,093	2,400,110
Amortized Cost Basis by Origination Year 2021	1,799,055	945,383
Amortized Cost Basis by Origination Year 2020	750,442	356,348
Amortized Cost Basis by Origination Year 2019	298,949	150,892
Amortized Cost Basis by Origination Year 2018	116,516	115,571
Amortized Cost Basis by Origination Year Prior to 2018	109,993	131,900
Amortized Cost - Revolving Loans	3,732,718	2,984,740
Amortized Cost - Revolving Loans Converted to Term Loans	12,175	247
Total Loans	8,099,941	7,085,191
Commercial and Industrial Portfolio [Member] | Agriculture [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2022	12,904	12,077
Amortized Cost Basis by Origination Year 2021	5,969	5,884
Amortized Cost Basis by Origination Year 2020	4,630	3,308
Amortized Cost Basis by Origination Year 2019	2,488	640
Amortized Cost Basis by Origination Year 2018	681	344
Amortized Cost Basis by Origination Year Prior to 2018	811	1,143
Amortized Cost - Revolving Loans	142,508	130,946
Amortized Cost - Revolving Loans Converted to Term Loans	686
Total Loans	170,677	154,342
Commercial and Industrial Portfolio [Member] | Overdrafts [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost - Revolving Loans	38,236	18,587
Total Loans	38,236	18,587
Specialty Lending Portfolio [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2022	13,279	34,552
Amortized Cost Basis by Origination Year 2021	45,178	49,373
Amortized Cost Basis by Origination Year 2020	43,403
Amortized Cost - Revolving Loans	443,977	438,437
Total Loans	545,837	522,362
Specialty Lending Portfolio [Member] | Asset-based Lending [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2022	13,279	34,552
Amortized Cost Basis by Origination Year 2021	45,178	49,373
Amortized Cost Basis by Origination Year 2020	43,403
Amortized Cost - Revolving Loans	443,977	331,282
Total Loans	545,837	415,207
Specialty Lending Portfolio [Member] | Factoring [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost - Revolving Loans		107,155
Total Loans		107,155
Commercial Real Estate Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2022	1,103,928	2,350,910
Amortized Cost Basis by Origination Year 2021	2,389,519	1,742,749
Amortized Cost Basis by Origination Year 2020	1,428,501	975,704
Amortized Cost Basis by Origination Year 2019	755,317	396,747
Amortized Cost Basis by Origination Year 2018	286,251	247,282
Amortized Cost Basis by Origination Year Prior to 2018	602,958	459,957
Amortized Cost - Revolving Loans	158,401	93,196
Amortized Cost - Revolving Loans Converted to Term Loans	958	999
Total Loans	6,725,833	6,267,544
Commercial Real Estate Portfolio Segment | Owner-occupied [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2022	446,181	680,135
Amortized Cost Basis by Origination Year 2021	615,430	519,448
Amortized Cost Basis by Origination Year 2020	425,538	226,631
Amortized Cost Basis by Origination Year 2019	191,426	177,576
Amortized Cost Basis by Origination Year 2018	149,627	91,539
Amortized Cost Basis by Origination Year Prior to 2018	218,128	159,482
Amortized Cost - Revolving Loans	92,485	11,727
Total Loans	2,138,815	1,866,538
Commercial Real Estate Portfolio Segment | Non-owner-occupied [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2022	367,756	1,058,025
Amortized Cost Basis by Origination Year 2021	999,661	689,167
Amortized Cost Basis by Origination Year 2020	585,175	591,886
Amortized Cost Basis by Origination Year 2019	474,868	162,491
Amortized Cost Basis by Origination Year 2018	117,895	135,100
Amortized Cost Basis by Origination Year Prior to 2018	334,057	258,541
Amortized Cost - Revolving Loans	11,455	10,969
Total Loans	2,890,867	2,906,179
Commercial Real Estate Portfolio Segment | Farmland [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2022	65,266	61,505
Amortized Cost Basis by Origination Year 2021	63,609	273,624
Amortized Cost Basis by Origination Year 2020	234,913	34,145
Amortized Cost Basis by Origination Year 2019	25,453	16,969
Amortized Cost Basis by Origination Year 2018	17,015	19,929
Amortized Cost Basis by Origination Year Prior to 2018	43,179	34,858
Amortized Cost - Revolving Loans	34,641	38,239
Amortized Cost - Revolving Loans Converted to Term Loans	56	999
Total Loans	484,132	480,268
Commercial Real Estate Portfolio Segment | 5+ Multi-family [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2022	30,139	58,268
Amortized Cost Basis by Origination Year 2021	52,827	95,024
Amortized Cost Basis by Origination Year 2020	71,699	41,426
Amortized Cost Basis by Origination Year 2019	19,219	1,206
Amortized Cost Basis by Origination Year 2018	1,674	511
Amortized Cost Basis by Origination Year Prior to 2018	7,166	6,820
Amortized Cost - Revolving Loans	3,779	2,057
Total Loans	186,503	205,312
Commercial Real Estate Portfolio Segment | 1-4 Family Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2022	27,681	53,004
Amortized Cost Basis by Origination Year 2021	41,091	4,933
Amortized Cost Basis by Origination Year 2020		17,333
Amortized Cost Basis by Origination Year 2019	160
Amortized Cost - Revolving Loans	2,743	985
Amortized Cost - Revolving Loans Converted to Term Loans	902
Total Loans	72,577	76,255
Commercial Real Estate Portfolio Segment | General Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2022	166,905	439,973
Amortized Cost Basis by Origination Year 2021	616,901	160,553
Amortized Cost Basis by Origination Year 2020	111,176	64,283
Amortized Cost Basis by Origination Year 2019	44,191	38,505
Amortized Cost Basis by Origination Year 2018	40	203
Amortized Cost Basis by Origination Year Prior to 2018	428	256
Amortized Cost - Revolving Loans	13,298	29,219
Total Loans	952,939	732,992
Consumer Real Estate Portfolio [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2022	387,571	839,875
Amortized Cost Basis by Origination Year 2021	786,521	719,110
Amortized Cost Basis by Origination Year 2020	648,142	203,855
Amortized Cost Basis by Origination Year 2019	185,770	60,458
Amortized Cost Basis by Origination Year 2018	52,833	63,107
Amortized Cost Basis by Origination Year Prior to 2018	156,157	110,659
Amortized Cost - Revolving Loans	309,802	320,446
Amortized Cost - Revolving Loans Converted to Term Loans	2,096	2,523
Total Loans	2,528,892	2,320,033
Consumer Real Estate Portfolio [Member] | HELOC [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2022	181	248
Amortized Cost Basis by Origination Year 2021		547
Amortized Cost Basis by Origination Year 2020	657	327
Amortized Cost Basis by Origination Year 2019	296	574
Amortized Cost Basis by Origination Year 2018	556	646
Amortized Cost Basis by Origination Year Prior to 2018	6,292	6,363
Amortized Cost - Revolving Loans	309,724	320,410
Amortized Cost - Revolving Loans Converted to Term Loans	2,096	2,523
Total Loans	319,802	331,638
Consumer Real Estate Portfolio [Member] | First Lien: 1-4 Family [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2022	382,504	830,513
Amortized Cost Basis by Origination Year 2021	777,416	712,264
Amortized Cost Basis by Origination Year 2020	642,288	200,167
Amortized Cost Basis by Origination Year 2019	182,611	58,734
Amortized Cost Basis by Origination Year 2018	51,162	61,641
Amortized Cost Basis by Origination Year Prior to 2018	148,059	102,997
Amortized Cost - Revolving Loans	16	19
Total Loans	2,184,056	1,966,335
Consumer Real Estate Portfolio [Member] | Junior Lien: 1-4 Family [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2022	4,886	9,114
Amortized Cost Basis by Origination Year 2021	9,105	6,299
Amortized Cost Basis by Origination Year 2020	5,197	3,361
Amortized Cost Basis by Origination Year 2019	2,863	1,150
Amortized Cost Basis by Origination Year 2018	1,115	820
Amortized Cost Basis by Origination Year Prior to 2018	1,806	1,299
Amortized Cost - Revolving Loans	62	17
Total Loans	25,034	22,060
Consumer Portfolio [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2022	19,063	42,251
Amortized Cost Basis by Origination Year 2021	37,491	9,816
Amortized Cost Basis by Origination Year 2020	7,329	7,411
Amortized Cost Basis by Origination Year 2019	5,367	2,650
Amortized Cost Basis by Origination Year 2018	1,901	3,021
Amortized Cost Basis by Origination Year Prior to 2018	2,612	928
Amortized Cost - Revolving Loans	97,667	62,938
Amortized Cost - Revolving Loans Converted to Term Loans	1,161	120
Total Loans	172,591	129,135
Consumer Portfolio [Member] | Revolving Line [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2022	1,381	974
Amortized Cost Basis by Origination Year 2021	906
Amortized Cost - Revolving Loans	57,100	60,049
Amortized Cost - Revolving Loans Converted to Term Loans	1,161	120
Total Loans	60,548	61,143
Consumer Portfolio [Member] | Auto [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2022	5,395	9,886
Amortized Cost Basis by Origination Year 2021	8,247	7,775
Amortized Cost Basis by Origination Year 2020	5,883	5,462
Amortized Cost Basis by Origination Year 2019	3,891	1,107
Amortized Cost Basis by Origination Year 2018	616	479
Amortized Cost Basis by Origination Year Prior to 2018	348	220
Total Loans	24,380	24,929
Consumer Portfolio [Member] | Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2022	12,287	31,391
Amortized Cost Basis by Origination Year 2021	28,338	2,041
Amortized Cost Basis by Origination Year 2020	1,446	1,949
Amortized Cost Basis by Origination Year 2019	1,476	1,543
Amortized Cost Basis by Origination Year 2018	1,285	2,542
Amortized Cost Basis by Origination Year Prior to 2018	2,264	708
Amortized Cost - Revolving Loans	40,567	2,889
Total Loans	87,663	43,063
Credit Cards Portfolio [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost - Revolving Loans	397,292	391,389
Total Loans	397,292	391,389
Credit Cards Portfolio [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost - Revolving Loans	178,456	180,296
Total Loans	178,456	180,296
Credit Cards Portfolio [Member] | Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost - Revolving Loans	218,836	211,093
Total Loans	218,836	211,093
Leases and Other Portfolio [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2022	45,839	99,952
Amortized Cost Basis by Origination Year 2021	96,193	44,113
Amortized Cost Basis by Origination Year 2020	42,556	58,978
Amortized Cost Basis by Origination Year 2019	32,254	22,344
Amortized Cost Basis by Origination Year 2018	18,406	6,370
Amortized Cost Basis by Origination Year Prior to 2018	2,423	1,393
Amortized Cost - Revolving Loans	55,188	49,138
Total Loans	292,859	282,288
Leases and Other Portfolio [Member] | Leases [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2020		814
Amortized Cost Basis by Origination Year 2019	814
Amortized Cost Basis by Origination Year 2018		739
Amortized Cost Basis by Origination Year Prior to 2018	1,306	614
Total Loans	2,120	2,167
Leases and Other Portfolio [Member] | Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2022	45,839	99,952
Amortized Cost Basis by Origination Year 2021	96,193	44,113
Amortized Cost Basis by Origination Year 2020	42,556	58,164
Amortized Cost Basis by Origination Year 2019	31,440	22,344
Amortized Cost Basis by Origination Year 2018	18,406	5,631
Amortized Cost Basis by Origination Year Prior to 2018	1,117	779
Amortized Cost - Revolving Loans	55,188	49,138
Total Loans	$ 290,739	$ 280,121

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