Credit Quality - Schedule of Risk Category of Loans by Class of Loans and Leases (Detail) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Disclosure Details Of Loans And Leases By Risk Category [Line Items]
Total	$ 11,150,967	$ 11,152,825
Owner-Occupied [Member]
Disclosure Details Of Loans And Leases By Risk Category [Line Items]
2022	130,241	319,007
2021	335,934	310,948
2020	300,962	161,164
2019	140,342	141,532
2018	124,846	170,890
Prior	640,570	588,075
Revolving loans amortized cost basis	40,462	40,915
Revolving loans converted to term loans	615	645
Total	1,713,972	1,733,176
Owner-Occupied [Member] | Pass [Member]
Disclosure Details Of Loans And Leases By Risk Category [Line Items]
2022	130,241	319,007
2021	334,991	310,893
2020	300,384	161,075
2019	139,810	135,472
2018	121,248	168,874
Prior	598,569	539,640
Revolving loans amortized cost basis	39,519	39,117
Revolving loans converted to term loans	376	401
Total	1,665,138	1,674,479
Owner-Occupied [Member] | Special Mention [Member]
Disclosure Details Of Loans And Leases By Risk Category [Line Items]
2022	0	0
2021	310	0
2020	531	51
2019	504	5,399
2018	2,947	712
Prior	20,524	20,672
Revolving loans amortized cost basis	943	959
Revolving loans converted to term loans	0	0
Total	25,759	27,793
Owner-Occupied [Member] | Substandard [Member]
Disclosure Details Of Loans And Leases By Risk Category [Line Items]
2022	0	0
2021	633	55
2020	47	38
2019	28	661
2018	651	1,304
Prior	21,188	27,458
Revolving loans amortized cost basis	0	839
Revolving loans converted to term loans	239	244
Total	22,786	30,599
Owner-Occupied [Member] | Doubtful [Member]
Disclosure Details Of Loans And Leases By Risk Category [Line Items]
2022	0	0
2021	0	0
2020	0	0
2019	0	0
2018	0	0
Prior	289	305
Revolving loans amortized cost basis	0	0
Revolving loans converted to term loans	0	0
Total	289	305
Owner-Occupied [Member] | YTS Charge Offs [Member]
Disclosure Details Of Loans And Leases By Risk Category [Line Items]
2022	0	0
2021	0	0
2020	0	0
2019	0	0
2018	0	(44)
Prior	(31)	(370)
Revolving loans amortized cost basis	0	0
Revolving loans converted to term loans	0	0
Total	(31)	(414)
Owner-Occupied [Member] | YTS Recoveries [Member]
Disclosure Details Of Loans And Leases By Risk Category [Line Items]
2022	0	0
2021	0	0
2020	0	0
2019	0	0
2018	0	13
Prior	465	856
Revolving loans amortized cost basis	0	0
Revolving loans converted to term loans	0	0
Total	465	869
Owner-Occupied [Member] | YTS Net Charge Offs [Member]
Disclosure Details Of Loans And Leases By Risk Category [Line Items]
2022	0	0
2021	0	0
2020	0	0
2019	0	0
2018	0	(31)
Prior	434	486
Revolving loans amortized cost basis	0	0
Revolving loans converted to term loans	0	0
Total	434	455
Nonowner-Occupied [Member]
Disclosure Details Of Loans And Leases By Risk Category [Line Items]
2022	748,563	1,559,293
2021	1,495,714	929,175
2020	783,916	834,267
2019	729,716	494,897
2018	437,403	398,470
Prior	1,637,095	1,633,793
Revolving loans amortized cost basis	123,280	105,354
Revolving loans converted to term loans	152	2,039
Total	5,955,839	5,957,288
Nonowner-Occupied [Member] | Pass [Member]
Disclosure Details Of Loans And Leases By Risk Category [Line Items]
2022	747,959	1,558,474
2021	1,495,714	925,508
2020	780,303	707,570
2019	612,860	460,660
2018	403,475	397,003
Prior	1,556,089	1,490,548
Revolving loans amortized cost basis	123,280	102,561
Revolving loans converted to term loans	152	2,039
Total	5,719,832	5,644,363
Nonowner-Occupied [Member] | Special Mention [Member]
Disclosure Details Of Loans And Leases By Risk Category [Line Items]
2022	604	819
2021	0	2,953
2020	2,916	113,655
2019	82,777	5,826
2018	5,698	372
Prior	22,995	40,534
Revolving loans amortized cost basis	0	2,793
Revolving loans converted to term loans	0	0
Total	114,990	166,952
Nonowner-Occupied [Member] | Substandard [Member]
Disclosure Details Of Loans And Leases By Risk Category [Line Items]
2022	0	0
2021	0	714
2020	697	13,042
2019	34,079	28,411
2018	28,230	1,095
Prior	58,011	102,711
Revolving loans amortized cost basis	0	0
Revolving loans converted to term loans	0	0
Total	121,017	145,973
Nonowner-Occupied [Member] | Doubtful [Member]
Disclosure Details Of Loans And Leases By Risk Category [Line Items]
2022	0	0
2021	0	0
2020	0	0
2019	0	0
2018	0	0
Prior	0	0
Revolving loans amortized cost basis	0	0
Revolving loans converted to term loans	0	0
Total	0	0
Nonowner-Occupied [Member] | YTS Charge Offs [Member]
Disclosure Details Of Loans And Leases By Risk Category [Line Items]
2022	0	0
2021	0	0
2020	0	0
2019	0	0
2018	0	0
Prior	0	(3,531)
Revolving loans amortized cost basis	0	0
Revolving loans converted to term loans	0	0
Total	0	(3,531)
Nonowner-Occupied [Member] | YTS Recoveries [Member]
Disclosure Details Of Loans And Leases By Risk Category [Line Items]
2022	0	0
2021	0	0
2020	0	0
2019	0	0
2018	0	0
Prior	115	1,907
Revolving loans amortized cost basis	0	0
Revolving loans converted to term loans	0	0
Total	115	1,097
Nonowner-Occupied [Member] | YTS Net Charge Offs [Member]
Disclosure Details Of Loans And Leases By Risk Category [Line Items]
2022	0	0
2021	0	0
2020	0	0
2019	0	0
2018	0	0
Prior	115	(1,624)
Revolving loans amortized cost basis	0	0
Revolving loans converted to term loans	0	0
Total	115	(1,624)
Other Commercial Loans [Member]
Disclosure Details Of Loans And Leases By Risk Category [Line Items]
2022	582,324	927,399
2021	700,977	557,433
2020	433,014	340,120
2019	287,699	115,368
2018	98,783	91,037
Prior	307,604	98,491
Revolving loans amortized cost basis	1,068,785	1,330,209
Revolving loans converted to term loans	1,970	2,304
Total	3,481,156	3,462,361
Other Commercial Loans [Member] | Pass [Member]
Disclosure Details Of Loans And Leases By Risk Category [Line Items]
2022	567,622	924,726
2021	697,587	557,422
2020	432,390	306,945
2019	284,419	107,426
2018	89,628	87,090
Prior	291,631	76,032
Revolving loans amortized cost basis	928,405	1,211,865
Revolving loans converted to term loans	1,795	2,038
Total	3,293,477	3,273,544
Other Commercial Loans [Member] | Special Mention [Member]
Disclosure Details Of Loans And Leases By Risk Category [Line Items]
2022	14,698	1,880
2021	3,308	0
2020	421	31,614
2019	2,510	3,012
2018	2,029	1,801
Prior	3,714	3,390
Revolving loans amortized cost basis	102,288	76,987
Revolving loans converted to term loans	50	61
Total	129,018	118,745
Other Commercial Loans [Member] | Substandard [Member]
Disclosure Details Of Loans And Leases By Risk Category [Line Items]
2022	4	793
2021	82	11
2020	203	1,561
2019	770	4,930
2018	7,025	2,146
Prior	12,259	18,963
Revolving loans amortized cost basis	38,092	41,357
Revolving loans converted to term loans	125	205
Total	58,560	69,966
Other Commercial Loans [Member] | Doubtful [Member]
Disclosure Details Of Loans And Leases By Risk Category [Line Items]
2022	0	0
2021	0	0
2020	0	0
2019	0	0
2018	101	0
Prior	0	106
Revolving loans amortized cost basis	0	0
Revolving loans converted to term loans	0	0
Total	101	106
Other Commercial Loans [Member] | YTS Charge Offs [Member]
Disclosure Details Of Loans And Leases By Risk Category [Line Items]
2022	0	0
2021	(31)	(87)
2020	0	(31)
2019	(200)	(200)
2018	(9)	(174)
Prior	(554)	(5,650)
Revolving loans amortized cost basis	0	(40)
Revolving loans converted to term loans	0	0
Total	(794)	(6,182)
Other Commercial Loans [Member] | YTS Recoveries [Member]
Disclosure Details Of Loans And Leases By Risk Category [Line Items]
2022	0	0
2021	0	3
2020	0	30
2019	4	86
2018	705	34
Prior	2,629	4,154
Revolving loans amortized cost basis	0	0
Revolving loans converted to term loans	0	0
Total	3,338	4,307
Other Commercial Loans [Member] | YTS Net Charge Offs [Member]
Disclosure Details Of Loans And Leases By Risk Category [Line Items]
2022	0	0
2021	(31)	(84)
2020	0	(1)
2019	(196)	(114)
2018	696	(140)
Prior	2,075	(1,496)
Revolving loans amortized cost basis	0	(40)
Revolving loans converted to term loans	0	0
Total	2,544	(1,875)
Residential Real Estate [Member]
Disclosure Details Of Loans And Leases By Risk Category [Line Items]
2022	820,260	816,157
2021	852,893	568,323
2020	500,179	383,694
2019	317,750	316,051
2018	265,394	180,955
Prior	902,231	963,754
Revolving loans amortized cost basis	443,250	459,541
Revolving loans converted to term loans	2,891	3,085
Total	4,104,848	3,691,560
Residential Real Estate [Member] | Pass [Member]
Disclosure Details Of Loans And Leases By Risk Category [Line Items]
2022	820,260	815,693
2021	851,239	568,323
2020	500,110	383,250
2019	317,301	315,211
2018	264,524	178,101
Prior	878,279	931,730
Revolving loans amortized cost basis	439,679	455,705
Revolving loans converted to term loans	2,891	2,972
Total	4,074,283	3,650,985
Residential Real Estate [Member] | Special Mention [Member]
Disclosure Details Of Loans And Leases By Risk Category [Line Items]
2022	0	0
2021	0	0
2020	0	0
2019	0	223
2018	221	91
Prior	5,055	12,251
Revolving loans amortized cost basis	2,079	2,339
Revolving loans converted to term loans	0	0
Total	7,355	14,904
Residential Real Estate [Member] | Substandard [Member]
Disclosure Details Of Loans And Leases By Risk Category [Line Items]
2022	0	464
2021	1,654	0
2020	69	444
2019	449	617
2018	649	2,763
Prior	18,897	19,773
Revolving loans amortized cost basis	1,492	1,497
Revolving loans converted to term loans	0	113
Total	23,210	25,671
Residential Real Estate [Member] | Doubtful [Member]
Disclosure Details Of Loans And Leases By Risk Category [Line Items]
2022	0	0
2021	0	0
2020	0	0
2019	0	0
2018	0	0
Prior	0	0
Revolving loans amortized cost basis	0	0
Revolving loans converted to term loans	0	0
Total	0	0
Residential Real Estate [Member] | YTS Charge Offs [Member]
Disclosure Details Of Loans And Leases By Risk Category [Line Items]
2022	0	0
2021	(735)	0
2020	0	(37)
2019	0	(38)
2018	(224)	(167)
Prior	(313)	(5,774)
Revolving loans amortized cost basis	0	0
Revolving loans converted to term loans	0	0
Total	(1,272)	(6,016)
Residential Real Estate [Member] | YTS Recoveries [Member]
Disclosure Details Of Loans And Leases By Risk Category [Line Items]
2022	0	0
2021	0	0
2020	0	0
2019	0	0
2018	14	3
Prior	1,044	2,384
Revolving loans amortized cost basis	1	13
Revolving loans converted to term loans	0	0
Total	1,059	2,400
Residential Real Estate [Member] | YTS Net Charge Offs [Member]
Disclosure Details Of Loans And Leases By Risk Category [Line Items]
2022	0	0
2021	(735)	0
2020	0	(37)
2019	0	(38)
2018	(210)	(164)
Prior	731	(3,390)
Revolving loans amortized cost basis	1	13
Revolving loans converted to term loans	0	0
Total	(213)	(3,616)
Construction & Land Development [Member]
Disclosure Details Of Loans And Leases By Risk Category [Line Items]
2022	281,030	767,683
2021	961,133	518,360
2020	452,875	281,561
2019	249,595	152,987
2018	109,234	18,371
Prior	110,446	81,041
Revolving loans amortized cost basis	230,971	194,162
Revolving loans converted to term loans	0	0
Total	2,395,284	2,014,165
Construction & Land Development [Member] | Pass [Member]
Disclosure Details Of Loans And Leases By Risk Category [Line Items]
2022	281,030	767,351
2021	960,857	518,291
2020	452,808	278,020
2019	246,205	152,062
2018	109,234	18,371
Prior	107,108	74,532
Revolving loans amortized cost basis	229,992	192,421
Revolving loans converted to term loans	0	0
Total	2,387,234	2,001,048
Construction & Land Development [Member] | Special Mention [Member]
Disclosure Details Of Loans And Leases By Risk Category [Line Items]
2022	0	0
2021	0	69
2020	67	3,261
2019	3,258	0
2018	0	0
Prior	1,209	1,237
Revolving loans amortized cost basis	979	995
Revolving loans converted to term loans	0	0
Total	5,513	5,562
Construction & Land Development [Member] | Substandard [Member]
Disclosure Details Of Loans And Leases By Risk Category [Line Items]
2022	0	332
2021	276	0
2020	0	280
2019	132	925
2018	0	0
Prior	2,129	5,272
Revolving loans amortized cost basis	0	746
Revolving loans converted to term loans	0	0
Total	2,537	7,555
Construction & Land Development [Member] | Doubtful [Member]
Disclosure Details Of Loans And Leases By Risk Category [Line Items]
2022	0	0
2021	0	0
2020	0	0
2019	0	0
2018	0	0
Prior	0	0
Revolving loans amortized cost basis	0	0
Revolving loans converted to term loans	0	0
Total	0	0
Construction & Land Development [Member] | YTS Charge Offs [Member]
Disclosure Details Of Loans And Leases By Risk Category [Line Items]
2022	0	0
2021	0	0
2020	0	0
2019	0	0
2018	0	(177)
Prior	(2)	(383)
Revolving loans amortized cost basis	0	0
Revolving loans converted to term loans	0	0
Total	(2)	(560)
Construction & Land Development [Member] | YTS Recoveries [Member]
Disclosure Details Of Loans And Leases By Risk Category [Line Items]
2022	0	0
2021	0	0
2020	0	0
2019	0	0
2018	0	133
Prior	1,261	471
Revolving loans amortized cost basis	0	0
Revolving loans converted to term loans	0	0
Total	1,261	604
Construction & Land Development [Member] | YTS Net Charge Offs [Member]
Disclosure Details Of Loans And Leases By Risk Category [Line Items]
2022	0	0
2021	0	0
2020	0	0
2019	0	0
2018	0	(44)
Prior	1,259	88
Revolving loans amortized cost basis	0	0
Revolving loans converted to term loans	0	0
Total	1,259	44
Bankcard [Member]
Disclosure Details Of Loans And Leases By Risk Category [Line Items]
2022	0	0
2021	0	0
2020	0	0
2019	0	0
2018	0	0
Prior	0	0
Revolving loans amortized cost basis	8,651	8,913
Revolving loans converted to term loans	0	0
Total	8,651	8,913
Bankcard [Member] | Pass [Member]
Disclosure Details Of Loans And Leases By Risk Category [Line Items]
2022	0	0
2021	0	0
2020	0	0
2019	0	0
2018	0	0
Prior	0	0
Revolving loans amortized cost basis	8,564	8,626
Revolving loans converted to term loans	0	0
Total	8,564	8,626
Bankcard [Member] | Special Mention [Member]
Disclosure Details Of Loans And Leases By Risk Category [Line Items]
2022	0	0
2021	0	0
2020	0	0
2019	0	0
2018	0	0
Prior	0	0
Revolving loans amortized cost basis	44	100
Revolving loans converted to term loans	0	0
Total	44	100
Bankcard [Member] | Substandard [Member]
Disclosure Details Of Loans And Leases By Risk Category [Line Items]
2022	0	0
2021	0	0
2020	0	0
2019	0	0
2018	0	0
Prior	0	0
Revolving loans amortized cost basis	43	187
Revolving loans converted to term loans	0	0
Total	43	187
Bankcard [Member] | Doubtful [Member]
Disclosure Details Of Loans And Leases By Risk Category [Line Items]
2022	0	0
2021	0	0
2020	0	0
2019	0	0
2018	0	0
Prior	0	0
Revolving loans amortized cost basis	0	0
Revolving loans converted to term loans	0	0
Total	0	0
Bankcard [Member] | YTS Charge Offs [Member]
Disclosure Details Of Loans And Leases By Risk Category [Line Items]
2022	0	0
2021	0	0
2020	0	0
2019	0	0
2018	0	0
Prior	0	0
Revolving loans amortized cost basis	(245)	(190)
Revolving loans converted to term loans	0	0
Total	(245)	(190)
Bankcard [Member] | YTS Recoveries [Member]
Disclosure Details Of Loans And Leases By Risk Category [Line Items]
2022	0	0
2021	0	0
2020	0	0
2019	0	0
2018	0	0
Prior	0
Revolving loans amortized cost basis	3	42
Revolving loans converted to term loans	0	0
Total	3	42
Bankcard [Member] | YTS Net Charge Offs [Member]
Disclosure Details Of Loans And Leases By Risk Category [Line Items]
2022	0	0
2021	0	0
2020	0	0
2019	0	0
2018	0	0
Prior	0	0
Revolving loans amortized cost basis	(242)	(148)
Revolving loans converted to term loans	0	0
Total	(242)	(148)
Other Consumer [Member]
Disclosure Details Of Loans And Leases By Risk Category [Line Items]
2022	424,922	479,933
2021	409,372	299,583
2020	233,362	237,744
2019	176,781	121,925
2018	85,205	30,288
Prior	1,524	10,888
Revolving loans amortized cost basis	3,209	3,483
Revolving loans converted to term loans	0	0
Total	1,334,375	1,183,844
Other Consumer [Member] | Pass [Member]
Disclosure Details Of Loans And Leases By Risk Category [Line Items]
2022	422,042	473,430
2021	397,073	293,023
2020	226,998	234,340
2019	173,114	119,678
2018	83,363	29,697
Prior	940	10,335
Revolving loans amortized cost basis	3,175	3,465
Revolving loans converted to term loans	0	0
Total	1,306,705	1,163,968
Other Consumer [Member] | Special Mention [Member]
Disclosure Details Of Loans And Leases By Risk Category [Line Items]
2022	2,644	5,600
2021	10,644	5,630
2020	4,942	2,948
2019	3,323	2,036
2018	1,617	569
Prior	547	466
Revolving loans amortized cost basis	34	13
Revolving loans converted to term loans	0	0
Total	23,751	17,262
Other Consumer [Member] | Substandard [Member]
Disclosure Details Of Loans And Leases By Risk Category [Line Items]
2022	236	903
2021	1,655	930
2020	1,422	456
2019	344	211
2018	225	22
Prior	37	87
Revolving loans amortized cost basis	0	5
Revolving loans converted to term loans	0	0
Total	3,919	2,614
Other Consumer [Member] | Doubtful [Member]
Disclosure Details Of Loans And Leases By Risk Category [Line Items]
2022	0	0
2021	0	0
2020	0	0
2019	0	0
2018	0	0
Prior	0	0
Revolving loans amortized cost basis	0	0
Revolving loans converted to term loans	0	0
Total	0	0
Other Consumer [Member] | YTS Charge Offs [Member]
Disclosure Details Of Loans And Leases By Risk Category [Line Items]
2022	(12)	(101)
2021	(514)	(776)
2020	(354)	(709)
2019	(205)	(483)
2018	(64)	(126)
Prior	(102)	(203)
Revolving loans amortized cost basis	0	(6)
Revolving loans converted to term loans	0	0
Total	(1,251)	(2,404)
Other Consumer [Member] | YTS Recoveries [Member]
Disclosure Details Of Loans And Leases By Risk Category [Line Items]
2022	0	5
2021	37	86
2020	34	51
2019	53	101
2018	44	18
Prior	107	186
Revolving loans amortized cost basis	0	2
Revolving loans converted to term loans	0	0
Total	275	449
Other Consumer [Member] | YTS Net Charge Offs [Member]
Disclosure Details Of Loans And Leases By Risk Category [Line Items]
2022	(12)	(96)
2021	(477)	(690)
2020	(320)	(658)
2019	(152)	(382)
2018	(20)	(108)
Prior	5	(17)
Revolving loans amortized cost basis	0	(4)
Revolving loans converted to term loans	0	0
Total	$ (976)	$ (1,955)