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, 2022	Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2022	$ 1,306,761	$ 5,779,727
Amortized Cost Basis by Origination Year 2021	5,484,611	3,516,428
Amortized Cost Basis by Origination Year 2020	3,223,619	1,605,604
Amortized Cost Basis by Origination Year 2019	1,401,192	633,731
Amortized Cost Basis by Origination Year 2018	505,441	435,695
Amortized Cost Basis by Origination Year Prior to 2018	977,880	705,980
Amortized Cost - Revolving Loans	4,797,418	4,489,817
Amortized Cost - Revolving Loans Converted to Term Loans	34,778	3,889
Total	17,731,700	17,170,871
Commercial and Industrial Portfolio [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2022	471,277	2,412,187
Amortized Cost Basis by Origination Year 2021	2,174,369	951,267
Amortized Cost Basis by Origination Year 2020	820,154	359,656
Amortized Cost Basis by Origination Year 2019	330,714	151,532
Amortized Cost Basis by Origination Year 2018	130,047	115,915
Amortized Cost Basis by Origination Year Prior to 2018	168,051	133,043
Amortized Cost - Revolving Loans	3,487,471	3,134,273
Amortized Cost - Revolving Loans Converted to Term Loans	31,816	247
Total	7,613,899	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	469,143	2,400,110
Amortized Cost Basis by Origination Year 2021	2,163,848	945,383
Amortized Cost Basis by Origination Year 2020	814,546	356,348
Amortized Cost Basis by Origination Year 2019	327,868	150,892
Amortized Cost Basis by Origination Year 2018	129,190	115,571
Amortized Cost Basis by Origination Year Prior to 2018	167,029	131,900
Amortized Cost - Revolving Loans	3,362,138	2,984,740
Amortized Cost - Revolving Loans Converted to Term Loans	31,816	247
Total	7,465,578	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	2,134	12,077
Amortized Cost Basis by Origination Year 2021	10,521	5,884
Amortized Cost Basis by Origination Year 2020	5,608	3,308
Amortized Cost Basis by Origination Year 2019	2,846	640
Amortized Cost Basis by Origination Year 2018	857	344
Amortized Cost Basis by Origination Year Prior to 2018	1,022	1,143
Amortized Cost - Revolving Loans	119,042	130,946
Total	142,030	154,342
Commercial and Industrial Portfolio [Member] | Overdrafts [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost - Revolving Loans	6,291	18,587
Total	6,291	18,587
Specialty Lending Portfolio [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2022	381	34,552
Amortized Cost Basis by Origination Year 2021	41,195	49,373
Amortized Cost Basis by Origination Year 2020	46,958
Amortized Cost - Revolving Loans	417,326	438,437
Total	505,860	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	381	34,552
Amortized Cost Basis by Origination Year 2021	41,195	49,373
Amortized Cost Basis by Origination Year 2020	46,958
Amortized Cost - Revolving Loans	417,326	331,282
Total	505,860	415,207
Specialty Lending Portfolio [Member] | Factoring [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost - Revolving Loans		107,155
Total		107,155
Commercial Real Estate Portfolio [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2022	640,803	2,350,910
Amortized Cost Basis by Origination Year 2021	2,318,920	1,742,749
Amortized Cost Basis by Origination Year 2020	1,620,730	975,704
Amortized Cost Basis by Origination Year 2019	812,421	396,747
Amortized Cost Basis by Origination Year 2018	294,701	247,282
Amortized Cost Basis by Origination Year Prior to 2018	638,004	459,957
Amortized Cost - Revolving Loans	93,931	93,196
Amortized Cost - Revolving Loans Converted to Term Loans		999
Total	6,419,510	6,267,544
Commercial Real Estate Portfolio [Member] | Owner-occupied [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2022	222,719	680,135
Amortized Cost Basis by Origination Year 2021	655,646	519,448
Amortized Cost Basis by Origination Year 2020	463,030	226,631
Amortized Cost Basis by Origination Year 2019	205,136	177,576
Amortized Cost Basis by Origination Year 2018	157,972	91,539
Amortized Cost Basis by Origination Year Prior to 2018	237,072	159,482
Amortized Cost - Revolving Loans	30,383	11,727
Total	1,971,958	1,866,538
Commercial Real Estate Portfolio [Member] | Non-owner-occupied [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2022	299,175	1,058,025
Amortized Cost Basis by Origination Year 2021	980,164	689,167
Amortized Cost Basis by Origination Year 2020	628,839	591,886
Amortized Cost Basis by Origination Year 2019	490,943	162,491
Amortized Cost Basis by Origination Year 2018	117,452	135,100
Amortized Cost Basis by Origination Year Prior to 2018	339,899	258,541
Amortized Cost - Revolving Loans	9,973	10,969
Total	2,866,445	2,906,179
Commercial Real Estate Portfolio [Member] | Farmland [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2022	16,236	61,505
Amortized Cost Basis by Origination Year 2021	65,635	273,624
Amortized Cost Basis by Origination Year 2020	261,388	34,145
Amortized Cost Basis by Origination Year 2019	28,963	16,969
Amortized Cost Basis by Origination Year 2018	17,528	19,929
Amortized Cost Basis by Origination Year Prior to 2018	53,334	34,858
Amortized Cost - Revolving Loans	32,177	38,239
Amortized Cost - Revolving Loans Converted to Term Loans		999
Total	475,261	480,268
Commercial Real Estate Portfolio [Member] | 5+ Multi-family [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2022	32,049	58,268
Amortized Cost Basis by Origination Year 2021	30,783	95,024
Amortized Cost Basis by Origination Year 2020	98,196	41,426
Amortized Cost Basis by Origination Year 2019	19,354	1,206
Amortized Cost Basis by Origination Year 2018	1,687	511
Amortized Cost Basis by Origination Year Prior to 2018	7,255	6,820
Amortized Cost - Revolving Loans	4,485	2,057
Total	193,809	205,312
Commercial Real Estate Portfolio [Member] | 1-4 Family Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2022	16,137	53,004
Amortized Cost Basis by Origination Year 2021	45,105	4,933
Amortized Cost Basis by Origination Year 2020	741	17,333
Amortized Cost Basis by Origination Year 2019	6,753
Amortized Cost - Revolving Loans	2,412	985
Total	71,148	76,255
Commercial Real Estate Portfolio [Member] | General Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2022	54,487	439,973
Amortized Cost Basis by Origination Year 2021	541,587	160,553
Amortized Cost Basis by Origination Year 2020	168,536	64,283
Amortized Cost Basis by Origination Year 2019	61,272	38,505
Amortized Cost Basis by Origination Year 2018	62	203
Amortized Cost Basis by Origination Year Prior to 2018	444	256
Amortized Cost - Revolving Loans	14,501	29,219
Total	840,889	732,992
Consumer Real Estate Portfolio [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2022	183,936	839,875
Amortized Cost Basis by Origination Year 2021	812,250	719,110
Amortized Cost Basis by Origination Year 2020	681,707	203,855
Amortized Cost Basis by Origination Year 2019	191,818	60,458
Amortized Cost Basis by Origination Year 2018	56,823	63,107
Amortized Cost Basis by Origination Year Prior to 2018	162,120	110,659
Amortized Cost - Revolving Loans	302,968	320,446
Amortized Cost - Revolving Loans Converted to Term Loans	1,692	2,523
Total	2,393,314	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		248
Amortized Cost Basis by Origination Year 2021	195	547
Amortized Cost Basis by Origination Year 2020	514	327
Amortized Cost Basis by Origination Year 2019	344	574
Amortized Cost Basis by Origination Year 2018	567	646
Amortized Cost Basis by Origination Year Prior to 2018	6,529	6,363
Amortized Cost - Revolving Loans	302,902	320,410
Amortized Cost - Revolving Loans Converted to Term Loans	1,692	2,523
Total	312,743	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	182,247	830,513
Amortized Cost Basis by Origination Year 2021	803,684	712,264
Amortized Cost Basis by Origination Year 2020	675,494	200,167
Amortized Cost Basis by Origination Year 2019	188,428	58,734
Amortized Cost Basis by Origination Year 2018	55,015	61,641
Amortized Cost Basis by Origination Year Prior to 2018	153,632	102,997
Amortized Cost - Revolving Loans	19	19
Total	2,058,519	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	1,689	9,114
Amortized Cost Basis by Origination Year 2021	8,371	6,299
Amortized Cost Basis by Origination Year 2020	5,699	3,361
Amortized Cost Basis by Origination Year 2019	3,046	1,150
Amortized Cost Basis by Origination Year 2018	1,241	820
Amortized Cost Basis by Origination Year Prior to 2018	1,959	1,299
Amortized Cost - Revolving Loans	47	17
Total	22,052	22,060
Consumer Portfolio [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2022	9,828	42,251
Amortized Cost Basis by Origination Year 2021	39,729	9,816
Amortized Cost Basis by Origination Year 2020	8,485	7,411
Amortized Cost Basis by Origination Year 2019	6,212	2,650
Amortized Cost Basis by Origination Year 2018	2,229	3,021
Amortized Cost Basis by Origination Year Prior to 2018	2,797	928
Amortized Cost - Revolving Loans	62,265	62,938
Amortized Cost - Revolving Loans Converted to Term Loans	1,270	120
Total	132,815	129,135
Consumer Portfolio [Member] | Revolving Line [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2022	179	974
Amortized Cost Basis by Origination Year 2021	971
Amortized Cost - Revolving Loans	58,028	60,049
Amortized Cost - Revolving Loans Converted to Term Loans	1,270	120
Total	60,448	61,143
Consumer Portfolio [Member] | Auto [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2022	2,666	9,886
Amortized Cost Basis by Origination Year 2021	9,014	7,775
Amortized Cost Basis by Origination Year 2020	6,794	5,462
Amortized Cost Basis by Origination Year 2019	4,577	1,107
Amortized Cost Basis by Origination Year 2018	810	479
Amortized Cost Basis by Origination Year Prior to 2018	486	220
Total	24,347	24,929
Consumer Portfolio [Member] | Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2022	6,983	31,391
Amortized Cost Basis by Origination Year 2021	29,744	2,041
Amortized Cost Basis by Origination Year 2020	1,691	1,949
Amortized Cost Basis by Origination Year 2019	1,635	1,543
Amortized Cost Basis by Origination Year 2018	1,419	2,542
Amortized Cost Basis by Origination Year Prior to 2018	2,311	708
Amortized Cost - Revolving Loans	4,237	2,889
Total	48,020	43,063
Credit Cards Portfolio [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost - Revolving Loans	397,100	391,389
Total	397,100	391,389
Credit Cards Portfolio [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost - Revolving Loans	171,735	180,296
Total	171,735	180,296
Credit Cards Portfolio [Member] | Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost - Revolving Loans	225,365	211,093
Total	225,365	211,093
Leases and Other Portfolio [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2022	536	99,952
Amortized Cost Basis by Origination Year 2021	98,148	44,113
Amortized Cost Basis by Origination Year 2020	45,585	58,978
Amortized Cost Basis by Origination Year 2019	60,027	22,344
Amortized Cost Basis by Origination Year 2018	21,641	6,370
Amortized Cost Basis by Origination Year Prior to 2018	6,908	1,393
Amortized Cost - Revolving Loans	36,357	49,138
Total	269,202	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	1,323	614
Total	2,137	2,167
Leases and Other Portfolio [Member] | Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2022	536	99,952
Amortized Cost Basis by Origination Year 2021	98,148	44,113
Amortized Cost Basis by Origination Year 2020	45,585	58,164
Amortized Cost Basis by Origination Year 2019	59,213	22,344
Amortized Cost Basis by Origination Year 2018	21,641	5,631
Amortized Cost Basis by Origination Year Prior to 2018	5,585	779
Amortized Cost - Revolving Loans	36,357	49,138
Total	$ 267,065	$ 280,121