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	Sep. 30, 2023	Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2023	$ 2,892,362	$ 5,578,255
Amortized Cost Basis by Origination Year 2022	5,631,347	4,716,362
Amortized Cost Basis by Origination Year 2021	4,282,519	2,611,634
Amortized Cost Basis by Origination Year 2020	2,179,887	1,089,550
Amortized Cost Basis by Origination Year 2019	930,260	382,756
Amortized Cost Basis by Origination Year Prior to 2019	767,104	665,491
Amortized Cost - Revolving Loans	6,188,701	5,980,269
Amortized Cost - Revolving Loans Converted to Term Loans	9,509	6,872
Total Loans	22,881,689	21,031,189
Commercial and Industrial Portfolio [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2023	1,262,552	2,154,239
Amortized Cost Basis by Origination Year 2023, Current period charge-offs	41
Amortized Cost Basis by Origination Year 2022	1,888,530	1,567,942
Amortized Cost Basis by Origination Year 2021	1,226,648	644,695
Amortized Cost Basis by Origination Year 2021, Current period charge-offs	883
Amortized Cost Basis by Origination Year 2020	457,054	269,429
Amortized Cost Basis by Origination Year 2019	227,240	97,312
Amortized Cost Basis by Origination Year Prior to 2019	103,139	87,328
Amortized Cost Basis by Origination Year Prior to 2019, Current period charge-offs	456
Amortized Cost - Revolving Loans	4,616,186	4,380,553
Amortized Cost - Revolving Loans, Current period charge-offs	3,347
Amortized Cost - Revolving Loans Converted to Term Loans	8,336	4,488
Total Loans	9,789,685	9,205,986
Total Loans, Current period charge-offs	4,727
Commercial and Industrial Portfolio [Member] | Equipment/Accounts Receivable/Inventory [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2023	1,250,651	2,140,609
Amortized Cost Basis by Origination Year 2022	1,882,547	1,562,527
Amortized Cost Basis by Origination Year 2021	1,222,414	642,649
Amortized Cost Basis by Origination Year 2020	455,865	267,444
Amortized Cost Basis by Origination Year 2019	225,610	96,916
Amortized Cost Basis by Origination Year Prior to 2019	102,859	86,787
Amortized Cost - Revolving Loans	4,457,511	4,223,358
Amortized Cost - Revolving Loans Converted to Term Loans	8,011	3,926
Total Loans	9,605,468	9,024,216
Commercial and Industrial Portfolio [Member] | Agriculture [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2023	11,901	13,630
Amortized Cost Basis by Origination Year 2022	5,983	5,415
Amortized Cost Basis by Origination Year 2021	4,234	2,046
Amortized Cost Basis by Origination Year 2020	1,189	1,985
Amortized Cost Basis by Origination Year 2019	1,630	396
Amortized Cost Basis by Origination Year Prior to 2019	280	541
Amortized Cost - Revolving Loans	141,554	149,266
Amortized Cost - Revolving Loans Converted to Term Loans	325	562
Total Loans	167,096	173,841
Commercial and Industrial Portfolio [Member] | Overdrafts [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost - Revolving Loans	17,121	7,929
Total Loans	17,121	7,929
Specialty Lending Portfolio [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2023	14,344	18,084
Amortized Cost Basis by Origination Year 2022	17,221	55,469
Amortized Cost Basis by Origination Year 2021	36,530	36,040
Amortized Cost Basis by Origination Year 2020	35,164
Amortized Cost - Revolving Loans	419,160	493,113
Amortized Cost - Revolving Loans, Current period charge-offs	762
Total Loans	522,419	602,706
Total Loans, Current period charge-offs	762
Specialty Lending Portfolio [Member] | Asset-based Lending [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2023	14,344	18,084
Amortized Cost Basis by Origination Year 2022	17,221	55,469
Amortized Cost Basis by Origination Year 2021	36,530	36,040
Amortized Cost Basis by Origination Year 2020	35,164
Amortized Cost - Revolving Loans	419,160	493,113
Total Loans	522,419	602,706
Commercial Real Estate Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2023	1,208,956	2,602,510
Amortized Cost Basis by Origination Year 2022	2,996,708	2,266,984
Amortized Cost Basis by Origination Year 2021	2,265,464	1,289,966
Amortized Cost Basis by Origination Year 2020	1,098,492	607,516
Amortized Cost Basis by Origination Year 2019	507,288	218,711
Amortized Cost Basis by Origination Year Prior to 2019	469,847	427,787
Amortized Cost Basis by Origination Year Prior to 2019, Current period charge-offs	21
Amortized Cost - Revolving Loans	231,883	202,612
Total Loans	8,778,638	7,616,086
Total Loans, Current period charge-offs	21
Commercial Real Estate Portfolio Segment | Owner-occupied [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2023	243,215	656,860
Amortized Cost Basis by Origination Year 2022	658,830	593,861
Amortized Cost Basis by Origination Year 2021	513,044	388,519
Amortized Cost Basis by Origination Year 2020	344,082	180,786
Amortized Cost Basis by Origination Year 2019	162,097	136,499
Amortized Cost Basis by Origination Year Prior to 2019	225,211	167,628
Amortized Cost - Revolving Loans	5,211	8,685
Total Loans	2,151,690	2,132,838
Commercial Real Estate Portfolio Segment | Non-owner-occupied [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2023	497,181	1,128,978
Amortized Cost Basis by Origination Year 2022	988,386	855,508
Amortized Cost Basis by Origination Year 2021	804,805	568,489
Amortized Cost Basis by Origination Year 2020	518,112	368,203
Amortized Cost Basis by Origination Year 2019	303,913	64,915
Amortized Cost Basis by Origination Year Prior to 2019	218,155	229,826
Amortized Cost - Revolving Loans	33,455	28,679
Total Loans	3,364,007	3,244,598
Commercial Real Estate Portfolio Segment | Farmland [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2023	56,787	94,989
Amortized Cost Basis by Origination Year 2022	76,085	47,092
Amortized Cost Basis by Origination Year 2021	44,625	220,796
Amortized Cost Basis by Origination Year 2020	199,827	24,057
Amortized Cost Basis by Origination Year 2019	22,252	15,963
Amortized Cost Basis by Origination Year Prior to 2019	20,649	24,162
Amortized Cost - Revolving Loans	94,270	121,054
Total Loans	514,495	548,113
Commercial Real Estate Portfolio Segment | 5+ Multi-family [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2023	831	30,920
Amortized Cost Basis by Origination Year 2022	27,690	35,869
Amortized Cost Basis by Origination Year 2021	208,264	68,996
Amortized Cost Basis by Origination Year 2020	32,209	18,978
Amortized Cost Basis by Origination Year 2019	18,363	1,334
Amortized Cost Basis by Origination Year Prior to 2019	5,697	5,776
Amortized Cost - Revolving Loans	8,214	4,908
Total Loans	301,268	166,781
Commercial Real Estate Portfolio Segment | 1-4 Family Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2023	63,788	61,943
Amortized Cost Basis by Origination Year 2022	40,097	15,217
Amortized Cost - Revolving Loans	5,275	19
Total Loans	109,160	77,179
Commercial Real Estate Portfolio Segment | General Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2023	347,154	628,820
Amortized Cost Basis by Origination Year 2022	1,205,620	719,437
Amortized Cost Basis by Origination Year 2021	694,726	43,166
Amortized Cost Basis by Origination Year 2020	4,262	15,492
Amortized Cost Basis by Origination Year 2019	663
Amortized Cost Basis by Origination Year Prior to 2019	135	395
Amortized Cost - Revolving Loans	85,458	39,267
Total Loans	2,338,018	1,446,577
Consumer Real Estate Portfolio [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2023	361,385	642,430
Amortized Cost Basis by Origination Year 2023, Current period charge-offs	67
Amortized Cost Basis by Origination Year 2022	604,911	756,807
Amortized Cost Basis by Origination Year 2022, Current period charge-offs	22
Amortized Cost Basis by Origination Year 2021	705,469	612,830
Amortized Cost Basis by Origination Year 2020	568,503	176,219
Amortized Cost Basis by Origination Year 2020, Current period charge-offs	11
Amortized Cost Basis by Origination Year 2019	163,330	47,501
Amortized Cost Basis by Origination Year Prior to 2019	177,539	147,336
Amortized Cost Basis by Origination Year Prior to 2019, Current period charge-offs	1,120
Amortized Cost - Revolving Loans	342,257	339,165
Amortized Cost - Revolving Loans Converted to Term Loans	1,121	981
Total Loans	2,924,515	2,723,269
Total Loans, Current period charge-offs	1,153
Consumer Real Estate Portfolio [Member] | HELOC [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2023		237
Amortized Cost Basis by Origination Year 2022	651
Amortized Cost Basis by Origination Year 2021		618
Amortized Cost Basis by Origination Year 2020	517	224
Amortized Cost Basis by Origination Year 2019	52	654
Amortized Cost Basis by Origination Year Prior to 2019	5,145	5,389
Amortized Cost - Revolving Loans	342,092	339,066
Amortized Cost - Revolving Loans Converted to Term Loans	1,121	981
Total Loans	349,578	347,169
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 2023	353,966	628,703
Amortized Cost Basis by Origination Year 2022	591,744	748,362
Amortized Cost Basis by Origination Year 2021	697,900	607,105
Amortized Cost Basis by Origination Year 2020	563,668	173,466
Amortized Cost Basis by Origination Year 2019	161,053	45,907
Amortized Cost Basis by Origination Year Prior to 2019	170,537	140,443
Amortized Cost - Revolving Loans	2	12
Total Loans	2,538,870	2,343,998
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 2023	7,419	13,490
Amortized Cost Basis by Origination Year 2022	12,516	8,445
Amortized Cost Basis by Origination Year 2021	7,569	5,107
Amortized Cost Basis by Origination Year 2020	4,318	2,529
Amortized Cost Basis by Origination Year 2019	2,225	940
Amortized Cost Basis by Origination Year Prior to 2019	1,857	1,504
Amortized Cost - Revolving Loans	163	87
Total Loans	36,067	32,102
Consumer Portfolio [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2023	14,289	35,897
Amortized Cost Basis by Origination Year 2022	29,731	34,878
Amortized Cost Basis by Origination Year 2022, Current period charge-offs	11
Amortized Cost Basis by Origination Year 2021	30,989	5,551
Amortized Cost Basis by Origination Year 2021, Current period charge-offs	20
Amortized Cost Basis by Origination Year 2020	3,279	3,619
Amortized Cost Basis by Origination Year 2020, Current period charge-offs	2
Amortized Cost Basis by Origination Year 2019	1,876	1,468
Amortized Cost Basis by Origination Year 2019, Current period charge-offs	6
Amortized Cost Basis by Origination Year Prior to 2019	1,456	750
Amortized Cost Basis by Origination Year Prior to 2019, Current period charge-offs	15
Amortized Cost - Revolving Loans	62,071	62,100
Amortized Cost - Revolving Loans, Current period charge-offs	813
Amortized Cost - Revolving Loans Converted to Term Loans	30	1,403
Total Loans	143,721	145,666
Total Loans, Current period charge-offs	934
Consumer Portfolio [Member] | Revolving Line [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2023		467
Amortized Cost Basis by Origination Year 2022		584
Amortized Cost - Revolving Loans	53,858	58,133
Amortized Cost - Revolving Loans Converted to Term Loans	30	1,403
Total Loans	53,888	60,587
Consumer Portfolio [Member] | Auto [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2023	9,408	9,124
Amortized Cost Basis by Origination Year 2022	6,643	6,543
Amortized Cost Basis by Origination Year 2021	4,556	4,455
Amortized Cost Basis by Origination Year 2020	2,657	2,743
Amortized Cost Basis by Origination Year 2019	1,422	335
Amortized Cost Basis by Origination Year Prior to 2019	200	159
Total Loans	24,886	23,359
Consumer Portfolio [Member] | Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2023	4,881	26,306
Amortized Cost Basis by Origination Year 2022	23,088	27,751
Amortized Cost Basis by Origination Year 2021	26,433	1,096
Amortized Cost Basis by Origination Year 2020	622	876
Amortized Cost Basis by Origination Year 2019	454	1,133
Amortized Cost Basis by Origination Year Prior to 2019	1,256	591
Amortized Cost - Revolving Loans	8,213	3,967
Total Loans	64,947	61,720
Credit Cards Portfolio [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost - Revolving Loans	450,564	431,672
Amortized Cost - Revolving Loans, Current period charge-offs	6,181
Total Loans	450,564	431,672
Total Loans, Current period charge-offs	6,181
Credit Cards Portfolio [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost - Revolving Loans	198,508	200,348
Total Loans	198,508	200,348
Credit Cards Portfolio [Member] | Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost - Revolving Loans	252,056	231,324
Total Loans	252,056	231,324
Leases and Other Portfolio [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2023	30,836	125,095
Amortized Cost Basis by Origination Year 2022	94,246	34,282
Amortized Cost Basis by Origination Year 2021	17,419	22,552
Amortized Cost Basis by Origination Year 2020	17,395	32,767
Amortized Cost Basis by Origination Year 2019	30,526	17,764
Amortized Cost Basis by Origination Year Prior to 2019	15,123	2,290
Amortized Cost - Revolving Loans	66,580	71,054
Amortized Cost - Revolving Loans Converted to Term Loans	22
Total Loans	272,147	305,804
Leases and Other Portfolio [Member] | Leases [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2020		712
Amortized Cost Basis by Origination Year 2019	610
Amortized Cost Basis by Origination Year Prior to 2019	1,123	1,224
Total Loans	1,733	1,936
Leases and Other Portfolio [Member] | Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortized Cost Basis by Origination Year 2023	30,836	125,095
Amortized Cost Basis by Origination Year 2022	94,246	34,282
Amortized Cost Basis by Origination Year 2021	17,419	22,552
Amortized Cost Basis by Origination Year 2020	17,395	32,055
Amortized Cost Basis by Origination Year 2019	29,916	17,764
Amortized Cost Basis by Origination Year Prior to 2019	14,000	1,066
Amortized Cost - Revolving Loans	66,580	71,054
Amortized Cost - Revolving Loans Converted to Term Loans	22
Total Loans	$ 270,414	$ 303,868