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	Mar. 31, 2024	Dec. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2024	$ 850,359	$ 3,930,419
Amortized Cost Basis by Origination Year 2023	3,728,244	5,252,010
Amortized Cost Basis by Origination Year 2022	5,288,011	4,042,524
Amortized Cost Basis by Origination Year 2021	3,811,318	2,032,891
Amortized Cost Basis by Origination Year 2020	1,962,866	846,589
Amortized Cost Basis by Origination Year Prior to 2020	1,434,418	711,630
Amortized Cost - Revolving Loans	6,553,066	6,345,327
Amortized Cost - Revolving Loans Converted to Term Loans	9,367	11,094
Total Loans	23,637,649	23,172,484
Commercial and Industrial Portfolio [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2024	264,113	1,801,235
Amortized Cost Basis by Origination Year 2023	1,692,134	1,492,449
Amortized Cost Basis by Origination Year 2023, Current period charge-offs	598
Amortized Cost Basis by Origination Year 2022	1,381,103	1,127,517
Amortized Cost Basis by Origination Year 2021	1,053,191	413,196
Amortized Cost Basis by Origination Year 2021, Current period charge-offs	8
Amortized Cost Basis by Origination Year 2020	373,954	203,304
Amortized Cost Basis by Origination Year 2020, Current period charge-offs	11
Amortized Cost Basis by Origination Year Prior to 2020	275,351	97,369
Amortized Cost Basis by Origination Year Prior to 2020, Current period charge-offs	327
Amortized Cost - Revolving Loans	4,892,959	4,788,523
Amortized Cost - Revolving Loans Converted to Term Loans	7,682	6,336
Total Loans	9,940,487	9,929,929
Total Loans, Current period charge-offs	944
Commercial and Industrial Portfolio [Member] | Equipment/Accounts Receivable/Inventory [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2024	257,186	1,787,301
Amortized Cost Basis by Origination Year 2023	1,684,615	1,486,609
Amortized Cost Basis by Origination Year 2022	1,375,494	1,123,732
Amortized Cost Basis by Origination Year 2021	1,049,875	412,276
Amortized Cost Basis by Origination Year 2020	373,261	202,827
Amortized Cost Basis by Origination Year Prior to 2020	274,811	97,130
Amortized Cost - Revolving Loans	4,737,704	4,615,872
Amortized Cost - Revolving Loans Converted to Term Loans	408	6,336
Total Loans	9,753,354	9,732,083
Commercial and Industrial Portfolio [Member] | Agriculture [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2024	6,927	13,934
Amortized Cost Basis by Origination Year 2023	7,519	5,840
Amortized Cost Basis by Origination Year 2022	5,609	3,785
Amortized Cost Basis by Origination Year 2021	3,316	920
Amortized Cost Basis by Origination Year 2020	693	477
Amortized Cost Basis by Origination Year Prior to 2020	540	239
Amortized Cost - Revolving Loans	143,642	169,173
Amortized Cost - Revolving Loans Converted to Term Loans	7,274
Total Loans	175,520	194,368
Commercial and Industrial Portfolio [Member] | Overdrafts [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost - Revolving Loans	11,613	3,478
Total Loans	11,613	3,478
Specialty Lending Portfolio [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2024	14,141	13,938
Amortized Cost Basis by Origination Year 2023	13,533	16,103
Amortized Cost Basis by Origination Year 2022	10,331	35,466
Amortized Cost Basis by Origination Year 2021	34,736	32,229
Amortized Cost Basis by Origination Year 2020	31,290
Amortized Cost - Revolving Loans	404,131	401,050
Total Loans	508,162	498,786
Specialty Lending Portfolio [Member] | Asset-based Lending [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2024	14,141	13,938
Amortized Cost Basis by Origination Year 2023	13,533	16,103
Amortized Cost Basis by Origination Year 2022	10,331	35,466
Amortized Cost Basis by Origination Year 2021	34,736	32,229
Amortized Cost Basis by Origination Year 2020	31,290
Amortized Cost - Revolving Loans	404,131	401,050
Total Loans	508,162	498,786
Commercial Real Estate Portfolio [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2024	496,872	1,566,773
Amortized Cost Basis by Origination Year 2023	1,495,796	3,021,395
Amortized Cost Basis by Origination Year 2022	3,219,561	2,143,657
Amortized Cost Basis by Origination Year 2021	2,003,241	1,014,490
Amortized Cost Basis by Origination Year 2021, Current period charge-offs	236
Amortized Cost Basis by Origination Year 2020	997,021	479,175
Amortized Cost Basis by Origination Year Prior to 2020	818,582	425,864
Amortized Cost Basis by Origination Year Prior to 2020, Current period charge-offs	14
Amortized Cost - Revolving Loans	254,092	239,178
Amortized Cost - Revolving Loans Converted to Term Loans		3,394
Total Loans	9,285,165	8,893,926
Total Loans, Current period charge-offs	250
Commercial Real Estate Portfolio [Member] | Owner-occupied [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2024	48,724	276,284
Amortized Cost Basis by Origination Year 2023	266,348	629,514
Amortized Cost Basis by Origination Year 2022	609,531	499,020
Amortized Cost Basis by Origination Year 2021	469,382	335,133
Amortized Cost Basis by Origination Year 2020	325,902	152,539
Amortized Cost Basis by Origination Year Prior to 2020	344,334	215,373
Amortized Cost - Revolving Loans	30,906	30,842
Total Loans	2,095,127	2,138,705
Commercial Real Estate Portfolio [Member] | Non-owner-occupied [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2024	270,265	556,369
Amortized Cost Basis by Origination Year 2023	552,649	901,614
Amortized Cost Basis by Origination Year 2022	1,051,353	849,496
Amortized Cost Basis by Origination Year 2021	777,159	449,547
Amortized Cost Basis by Origination Year 2020	444,898	293,531
Amortized Cost Basis by Origination Year Prior to 2020	418,491	185,679
Amortized Cost - Revolving Loans	32,083	36,313
Total Loans	3,546,898	3,272,549
Commercial Real Estate Portfolio [Member] | Farmland [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2024	22,535	75,418
Amortized Cost Basis by Origination Year 2023	49,775	71,087
Amortized Cost Basis by Origination Year 2022	68,886	39,128
Amortized Cost Basis by Origination Year 2021	38,529	195,750
Amortized Cost Basis by Origination Year 2020	192,403	15,608
Amortized Cost Basis by Origination Year Prior to 2020	33,790	19,700
Amortized Cost - Revolving Loans	101,511	89,291
Total Loans	507,429	505,982
Commercial Real Estate Portfolio [Member] | 5+ Multi-family [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2024	70,128	34,714
Amortized Cost Basis by Origination Year 2023	34,705	27,668
Amortized Cost Basis by Origination Year 2022	36,595	240,724
Amortized Cost Basis by Origination Year 2021	247,624	29,840
Amortized Cost Basis by Origination Year 2020	29,640	16,861
Amortized Cost Basis by Origination Year Prior to 2020	21,232	4,982
Amortized Cost - Revolving Loans	8,780	9,274
Total Loans	448,704	364,063
Commercial Real Estate Portfolio [Member] | 1-4 Family Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2024	7,057	49,327
Amortized Cost Basis by Origination Year 2023	35,839	51,360
Amortized Cost Basis by Origination Year 2022	55,749
Amortized Cost - Revolving Loans	3,165	3,286
Amortized Cost - Revolving Loans Converted to Term Loans		3,394
Total Loans	101,810	107,367
Commercial Real Estate Portfolio [Member] | General Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2024	78,163	574,661
Amortized Cost Basis by Origination Year 2023	556,480	1,340,152
Amortized Cost Basis by Origination Year 2022	1,397,447	515,289
Amortized Cost Basis by Origination Year 2021	470,547	4,220
Amortized Cost Basis by Origination Year 2020	4,178	636
Amortized Cost Basis by Origination Year Prior to 2020	735	130
Amortized Cost - Revolving Loans	77,647	70,172
Total Loans	2,585,197	2,505,260
Consumer Real Estate Portfolio [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2024	68,136	431,579
Amortized Cost Basis by Origination Year 2023	421,890	597,994
Amortized Cost Basis by Origination Year 2022	585,911	688,869
Amortized Cost Basis by Origination Year 2021	674,960	553,283
Amortized Cost Basis by Origination Year 2020	542,000	160,427
Amortized Cost Basis by Origination Year Prior to 2020	322,665	171,924
Amortized Cost - Revolving Loans	355,861	355,192
Amortized Cost - Revolving Loans, Current period charge-offs	174
Amortized Cost - Revolving Loans Converted to Term Loans	1,308	1,364
Total Loans	2,972,731	2,960,632
Total Loans, Current period charge-offs	174
Consumer Real Estate Portfolio [Member] | HELOC [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2024	33	150
Amortized Cost Basis by Origination Year 2023		650
Amortized Cost Basis by Origination Year 2022	706
Amortized Cost Basis by Origination Year 2021	120	497
Amortized Cost Basis by Origination Year 2020	483	82
Amortized Cost Basis by Origination Year Prior to 2020	5,039	4,958
Amortized Cost - Revolving Loans	355,776	355,105
Amortized Cost - Revolving Loans Converted to Term Loans	1,308	1,364
Total Loans	363,465	362,806
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 2024	61,498	419,312
Amortized Cost Basis by Origination Year 2023	410,308	585,401
Amortized Cost Basis by Origination Year 2022	573,518	682,008
Amortized Cost Basis by Origination Year 2021	668,179	548,859
Amortized Cost Basis by Origination Year 2020	537,918	158,228
Amortized Cost Basis by Origination Year Prior to 2020	314,400	165,197
Amortized Cost - Revolving Loans		2
Total Loans	2,565,821	2,559,007
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 2024	6,605	12,117
Amortized Cost Basis by Origination Year 2023	11,582	11,943
Amortized Cost Basis by Origination Year 2022	11,687	6,861
Amortized Cost Basis by Origination Year 2021	6,661	3,927
Amortized Cost Basis by Origination Year 2020	3,599	2,117
Amortized Cost Basis by Origination Year Prior to 2020	3,226	1,769
Amortized Cost - Revolving Loans	85	85
Total Loans	43,445	38,819
Consumer Portfolio [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2024	3,416	16,410
Amortized Cost Basis by Origination Year 2023	14,480	28,160
Amortized Cost Basis by Origination Year 2023, Current period charge-offs	12
Amortized Cost Basis by Origination Year 2022	26,391	30,047
Amortized Cost Basis by Origination Year 2022, Current period charge-offs	3
Amortized Cost Basis by Origination Year 2021	29,357	2,744
Amortized Cost Basis by Origination Year 2020	2,275	1,453
Amortized Cost Basis by Origination Year Prior to 2020	1,779	1,401
Amortized Cost - Revolving Loans	68,527	83,076
Amortized Cost - Revolving Loans, Current period charge-offs	393
Amortized Cost - Revolving Loans Converted to Term Loans	377
Total Loans	146,602	163,291
Total Loans, Current period charge-offs	408
Consumer Portfolio [Member] | Revolving Line [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2024		48
Amortized Cost Basis by Origination Year 2023	41
Amortized Cost - Revolving Loans	61,062	56,272
Amortized Cost - Revolving Loans Converted to Term Loans	377
Total Loans	61,480	56,320
Consumer Portfolio [Member] | Auto [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2024	2,170	11,509
Amortized Cost Basis by Origination Year 2023	10,293	6,013
Amortized Cost Basis by Origination Year 2022	5,302	3,922
Amortized Cost Basis by Origination Year 2021	3,342	2,170
Amortized Cost Basis by Origination Year 2020	1,767	1,088
Amortized Cost Basis by Origination Year Prior to 2020	866	158
Total Loans	23,740	24,860
Consumer Portfolio [Member] | Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2024	1,246	4,853
Amortized Cost Basis by Origination Year 2023	4,146	22,147
Amortized Cost Basis by Origination Year 2022	21,089	26,125
Amortized Cost Basis by Origination Year 2021	26,015	574
Amortized Cost Basis by Origination Year 2020	508	365
Amortized Cost Basis by Origination Year Prior to 2020	913	1,243
Amortized Cost - Revolving Loans	7,465	26,804
Total Loans	61,382	82,111
Credit Cards Portfolio [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost - Revolving Loans	538,498	423,956
Amortized Cost - Revolving Loans, Current period charge-offs	3,701
Total Loans	538,498	423,956
Total Loans, Current period charge-offs	3,701
Credit Cards Portfolio [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost - Revolving Loans	295,307	197,095
Total Loans	295,307	197,095
Credit Cards Portfolio [Member] | Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost - Revolving Loans	243,191	226,861
Total Loans	243,191	226,861
Leases and Other Portfolio [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2024	3,681	100,484
Amortized Cost Basis by Origination Year 2023	90,411	95,909
Amortized Cost Basis by Origination Year 2022	64,714	16,968
Amortized Cost Basis by Origination Year 2021	15,833	16,949
Amortized Cost Basis by Origination Year 2020	16,326	2,230
Amortized Cost Basis by Origination Year Prior to 2020	16,041	15,072
Amortized Cost - Revolving Loans	38,998	54,352
Total Loans	246,004	301,964
Leases and Other Portfolio [Member] | Leases [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2020		610
Amortized Cost Basis by Origination Year Prior to 2020	1,699	1,106
Total Loans	1,699	1,716
Leases and Other Portfolio [Member] | Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2024	3,681	100,484
Amortized Cost Basis by Origination Year 2023	90,411	95,909
Amortized Cost Basis by Origination Year 2022	64,714	16,968
Amortized Cost Basis by Origination Year 2021	15,833	16,949
Amortized Cost Basis by Origination Year 2020	16,326	1,620
Amortized Cost Basis by Origination Year Prior to 2020	14,342	13,966
Amortized Cost - Revolving Loans	38,998	54,352
Total Loans	$ 244,305	$ 300,248