Loans and Allowance for Credit Losses (Disaggregation of Credit Quality Disclosures) (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Total Commercial [Member]
Accounts Notes And Loans Receivable [Line Items]
Notes Receivable Gross	$ 18,591,095	$ 18,589,081
Total Commercial [Member] | Pass [Member]
Accounts Notes And Loans Receivable [Line Items]
Notes Receivable Gross	17,780,196	17,881,759
Total Commercial [Member] | Pass-Watch [Member]
Accounts Notes And Loans Receivable [Line Items]
Notes Receivable Gross	471,028	433,630
Total Commercial [Member] | Special Mention [Member]
Accounts Notes And Loans Receivable [Line Items]
Notes Receivable Gross	49,439	59,315
Total Commercial [Member] | Substandard [Member]
Accounts Notes And Loans Receivable [Line Items]
Notes Receivable Gross	290,432	214,377
Residential Mortgages [Member]
Accounts Notes And Loans Receivable [Line Items]
Term Loans, Amortized Cost Basis by Origination Year, 2024	67,697	439,585
Term Loans, Amortized Cost Basis by Origination Year, 2023	415,318	912,594
Term Loans, Amortized Cost Basis by Origination Year, 2022	1,015,094	953,660
Term Loans, Amortized Cost Basis by Origination Year, 2021	951,151	489,992
Term Loans, Amortized Cost Basis by Origination Year, 2020	479,538	178,407
Term Loans, Amortized Cost Basis by Origination Year, Prior	1,050,906	908,219
Revolving Loans	3,617	3,615
Revolving Loans Converted to Term Loans	0
Notes Receivable Gross	3,983,321	3,886,072
Residential Mortgages [Member] | Performing [Member]
Accounts Notes And Loans Receivable [Line Items]
Term Loans, Amortized Cost Basis by Origination Year, 2024	67,697	439,024
Term Loans, Amortized Cost Basis by Origination Year, 2023	414,407	910,361
Term Loans, Amortized Cost Basis by Origination Year, 2022	1,012,153	950,400
Term Loans, Amortized Cost Basis by Origination Year, 2021	946,874	489,262
Term Loans, Amortized Cost Basis by Origination Year, 2020	479,252	176,041
Term Loans, Amortized Cost Basis by Origination Year, Prior	1,033,398	891,232
Revolving Loans	3,617	3,615
Notes Receivable Gross	3,957,398	3,859,935
Residential Mortgages [Member] | Nonperforming [Member]
Accounts Notes And Loans Receivable [Line Items]
Term Loans, Amortized Cost Basis by Origination Year, 2024		561
Term Loans, Amortized Cost Basis by Origination Year, 2023	911	2,233
Term Loans, Amortized Cost Basis by Origination Year, 2022	2,941	3,260
Term Loans, Amortized Cost Basis by Origination Year, 2021	4,277	730
Term Loans, Amortized Cost Basis by Origination Year, 2020	286	2,366
Term Loans, Amortized Cost Basis by Origination Year, Prior	17,508	16,987
Notes Receivable Gross	25,923	26,137
Residential Mortgages [Member] | Gross Charge-offs [Member]
Accounts Notes And Loans Receivable [Line Items]
Term Loans, Amortized Cost Basis by Origination Year, 2021	2
Term Loans, Amortized Cost Basis by Origination Year, Prior	54	55
Notes Receivable Gross	56	55
Consumer [Member]
Accounts Notes And Loans Receivable [Line Items]
Term Loans, Amortized Cost Basis by Origination Year, 2024	27,395	75,791
Term Loans, Amortized Cost Basis by Origination Year, 2023	56,298	59,691
Term Loans, Amortized Cost Basis by Origination Year, 2022	54,536	36,938
Term Loans, Amortized Cost Basis by Origination Year, 2021	33,521	28,514
Term Loans, Amortized Cost Basis by Origination Year, 2020	25,704	32,247
Term Loans, Amortized Cost Basis by Origination Year, Prior	76,159	41,678
Revolving Loans	1,111,317	1,144,770
Revolving Loans Converted to Term Loans	11,592	27,135
Notes Receivable Gross	1,396,522	1,446,764
Consumer [Member] | Performing [Member]
Accounts Notes And Loans Receivable [Line Items]
Term Loans, Amortized Cost Basis by Origination Year, 2024	27,375	75,615
Term Loans, Amortized Cost Basis by Origination Year, 2023	56,206	59,454
Term Loans, Amortized Cost Basis by Origination Year, 2022	53,824	36,693
Term Loans, Amortized Cost Basis by Origination Year, 2021	32,622	28,076
Term Loans, Amortized Cost Basis by Origination Year, 2020	24,841	31,802
Term Loans, Amortized Cost Basis by Origination Year, Prior	71,041	39,150
Revolving Loans	1,111,067	1,144,401
Revolving Loans Converted to Term Loans	9,366	23,018
Notes Receivable Gross	1,386,342	1,438,209
Consumer [Member] | Nonperforming [Member]
Accounts Notes And Loans Receivable [Line Items]
Term Loans, Amortized Cost Basis by Origination Year, 2024	20	176
Term Loans, Amortized Cost Basis by Origination Year, 2023	92	237
Term Loans, Amortized Cost Basis by Origination Year, 2022	712	245
Term Loans, Amortized Cost Basis by Origination Year, 2021	899	438
Term Loans, Amortized Cost Basis by Origination Year, 2020	863	445
Term Loans, Amortized Cost Basis by Origination Year, Prior	5,118	2,528
Revolving Loans	250	369
Revolving Loans Converted to Term Loans	2,226	4,117
Notes Receivable Gross	10,180	8,555
Consumer [Member] | Gross Charge-offs [Member]
Accounts Notes And Loans Receivable [Line Items]
Term Loans, Amortized Cost Basis by Origination Year, 2024		567
Term Loans, Amortized Cost Basis by Origination Year, 2023	635	2,388
Term Loans, Amortized Cost Basis by Origination Year, 2022	832	1,473
Term Loans, Amortized Cost Basis by Origination Year, 2021	404	215
Term Loans, Amortized Cost Basis by Origination Year, 2020	49	573
Term Loans, Amortized Cost Basis by Origination Year, Prior	315	824
Revolving Loans	2,040	7,735
Revolving Loans Converted to Term Loans	511	1,618
Notes Receivable Gross	4,786	15,393
Residential Mortgage and Consumer [Member]
Accounts Notes And Loans Receivable [Line Items]
Notes Receivable Gross	5,379,843	5,332,836
Residential Mortgage and Consumer [Member] | Performing [Member]
Accounts Notes And Loans Receivable [Line Items]
Notes Receivable Gross	5,343,740	5,298,144
Residential Mortgage and Consumer [Member] | Nonperforming [Member]
Accounts Notes And Loans Receivable [Line Items]
Notes Receivable Gross	36,103	34,692
Commercial Non-Real Estate [Member]
Accounts Notes And Loans Receivable [Line Items]
Term Loans, Amortized Cost Basis by Origination Year, 2024	375,256	1,636,237
Term Loans, Amortized Cost Basis by Origination Year, 2023	1,549,923	1,926,982
Term Loans, Amortized Cost Basis by Origination Year, 2022	1,811,630	1,146,981
Term Loans, Amortized Cost Basis by Origination Year, 2021	1,064,418	500,069
Term Loans, Amortized Cost Basis by Origination Year, 2020	453,956	406,719
Term Loans, Amortized Cost Basis by Origination Year, Prior	1,273,537	934,756
Revolving Loans	3,346,914	3,337,514
Revolving Loans Converted to Term Loans	50,699	68,026
Notes Receivable Gross	9,926,333	9,957,284
Commercial Non-Real Estate [Member] | Pass [Member]
Accounts Notes And Loans Receivable [Line Items]
Term Loans, Amortized Cost Basis by Origination Year, 2024	356,133	1,557,202
Term Loans, Amortized Cost Basis by Origination Year, 2023	1,456,018	1,812,370
Term Loans, Amortized Cost Basis by Origination Year, 2022	1,709,790	1,106,433
Term Loans, Amortized Cost Basis by Origination Year, 2021	1,018,785	483,739
Term Loans, Amortized Cost Basis by Origination Year, 2020	426,293	398,626
Term Loans, Amortized Cost Basis by Origination Year, Prior	1,242,580	923,143
Revolving Loans	3,154,253	3,186,189
Revolving Loans Converted to Term Loans	44,009	56,316
Notes Receivable Gross	9,407,861	9,524,018
Commercial Non-Real Estate [Member] | Pass-Watch [Member]
Accounts Notes And Loans Receivable [Line Items]
Term Loans, Amortized Cost Basis by Origination Year, 2024	1,548	30,360
Term Loans, Amortized Cost Basis by Origination Year, 2023	55,622	60,228
Term Loans, Amortized Cost Basis by Origination Year, 2022	21,358	20,730
Term Loans, Amortized Cost Basis by Origination Year, 2021	27,428	8,245
Term Loans, Amortized Cost Basis by Origination Year, 2020	19,555	4,988
Term Loans, Amortized Cost Basis by Origination Year, Prior	26,843	9,117
Revolving Loans	102,356	94,252
Revolving Loans Converted to Term Loans	708	6,291
Notes Receivable Gross	255,418	234,211
Commercial Non-Real Estate [Member] | Special Mention [Member]
Accounts Notes And Loans Receivable [Line Items]
Term Loans, Amortized Cost Basis by Origination Year, 2024	11,035	411
Term Loans, Amortized Cost Basis by Origination Year, 2023	2,640	6,206
Term Loans, Amortized Cost Basis by Origination Year, 2022	499	936
Term Loans, Amortized Cost Basis by Origination Year, 2021	11	27
Term Loans, Amortized Cost Basis by Origination Year, 2020	124	26
Term Loans, Amortized Cost Basis by Origination Year, Prior	806	836
Revolving Loans	9,800	2,620
Revolving Loans Converted to Term Loans	143	424
Notes Receivable Gross	25,058	11,486
Commercial Non-Real Estate [Member] | Substandard [Member]
Accounts Notes And Loans Receivable [Line Items]
Term Loans, Amortized Cost Basis by Origination Year, 2024	6,540	48,264
Term Loans, Amortized Cost Basis by Origination Year, 2023	35,643	48,178
Term Loans, Amortized Cost Basis by Origination Year, 2022	79,983	18,882
Term Loans, Amortized Cost Basis by Origination Year, 2021	18,194	8,058
Term Loans, Amortized Cost Basis by Origination Year, 2020	7,984	3,079
Term Loans, Amortized Cost Basis by Origination Year, Prior	3,308	1,660
Revolving Loans	80,505	54,453
Revolving Loans Converted to Term Loans	5,839	4,995
Notes Receivable Gross	237,996	187,569
Commercial Non-Real Estate [Member] | Gross Charge-offs [Member]
Accounts Notes And Loans Receivable [Line Items]
Term Loans, Amortized Cost Basis by Origination Year, 2024		7,885
Term Loans, Amortized Cost Basis by Origination Year, 2023	3,907	1,179
Term Loans, Amortized Cost Basis by Origination Year, 2022	850	1,484
Term Loans, Amortized Cost Basis by Origination Year, 2021	106	27,000
Term Loans, Amortized Cost Basis by Origination Year, 2020	51	81
Term Loans, Amortized Cost Basis by Origination Year, Prior	1,483	1,750
Revolving Loans	2,323	11,971
Revolving Loans Converted to Term Loans	910	8,480
Notes Receivable Gross	9,630	59,830
Commercial Real Estate - Owner Occupied [Member]
Accounts Notes And Loans Receivable [Line Items]
Term Loans, Amortized Cost Basis by Origination Year, 2024	60,032	380,199
Term Loans, Amortized Cost Basis by Origination Year, 2023	372,589	704,169
Term Loans, Amortized Cost Basis by Origination Year, 2022	705,962	631,510
Term Loans, Amortized Cost Basis by Origination Year, 2021	616,709	505,800
Term Loans, Amortized Cost Basis by Origination Year, 2020	499,063	293,517
Term Loans, Amortized Cost Basis by Origination Year, Prior	783,812	523,745
Revolving Loans	41,728	42,236
Revolving Loans Converted to Term Loans	297	12,587
Notes Receivable Gross	3,080,192	3,093,763
Commercial Real Estate - Owner Occupied [Member] | Pass [Member]
Accounts Notes And Loans Receivable [Line Items]
Term Loans, Amortized Cost Basis by Origination Year, 2024	60,032	374,466
Term Loans, Amortized Cost Basis by Origination Year, 2023	368,653	689,626
Term Loans, Amortized Cost Basis by Origination Year, 2022	676,512	620,272
Term Loans, Amortized Cost Basis by Origination Year, 2021	605,118	501,054
Term Loans, Amortized Cost Basis by Origination Year, 2020	492,383	284,032
Term Loans, Amortized Cost Basis by Origination Year, Prior	744,599	493,707
Revolving Loans	40,598	40,533
Revolving Loans Converted to Term Loans	297	12,587
Notes Receivable Gross	2,988,192	3,016,277
Commercial Real Estate - Owner Occupied [Member] | Pass-Watch [Member]
Accounts Notes And Loans Receivable [Line Items]
Term Loans, Amortized Cost Basis by Origination Year, 2024		2,574
Term Loans, Amortized Cost Basis by Origination Year, 2023	2,978	9,587
Term Loans, Amortized Cost Basis by Origination Year, 2022	24,790	9,654
Term Loans, Amortized Cost Basis by Origination Year, 2021	9,816	3,451
Term Loans, Amortized Cost Basis by Origination Year, 2020	5,317	8,791
Term Loans, Amortized Cost Basis by Origination Year, Prior	19,747	17,581
Revolving Loans	687	389
Notes Receivable Gross	63,335	52,027
Commercial Real Estate - Owner Occupied [Member] | Special Mention [Member]
Accounts Notes And Loans Receivable [Line Items]
Term Loans, Amortized Cost Basis by Origination Year, 2024		837
Term Loans, Amortized Cost Basis by Origination Year, 2022		617
Term Loans, Amortized Cost Basis by Origination Year, 2021	187
Term Loans, Amortized Cost Basis by Origination Year, 2020		110
Term Loans, Amortized Cost Basis by Origination Year, Prior	17,330	5,083
Revolving Loans	150
Notes Receivable Gross	17,667	6,647
Commercial Real Estate - Owner Occupied [Member] | Substandard [Member]
Accounts Notes And Loans Receivable [Line Items]
Term Loans, Amortized Cost Basis by Origination Year, 2024		2,322
Term Loans, Amortized Cost Basis by Origination Year, 2023	958	4,956
Term Loans, Amortized Cost Basis by Origination Year, 2022	4,660	967
Term Loans, Amortized Cost Basis by Origination Year, 2021	1,588	1,295
Term Loans, Amortized Cost Basis by Origination Year, 2020	1,363	584
Term Loans, Amortized Cost Basis by Origination Year, Prior	2,136	7,374
Revolving Loans	293	1,314
Notes Receivable Gross	10,998	18,812
Commercial Real Estate - Income Producing [Member]
Accounts Notes And Loans Receivable [Line Items]
Term Loans, Amortized Cost Basis by Origination Year, 2024	67,326	470,045
Term Loans, Amortized Cost Basis by Origination Year, 2023	515,976	990,741
Term Loans, Amortized Cost Basis by Origination Year, 2022	975,615	970,574
Term Loans, Amortized Cost Basis by Origination Year, 2021	1,022,422	693,539
Term Loans, Amortized Cost Basis by Origination Year, 2020	696,492	347,293
Term Loans, Amortized Cost Basis by Origination Year, Prior	693,870	398,341
Revolving Loans	66,938	67,486
Revolving Loans Converted to Term Loans	4,158	48,924
Notes Receivable Gross	4,042,797	3,986,943
Commercial Real Estate - Income Producing [Member] | Pass [Member]
Accounts Notes And Loans Receivable [Line Items]
Term Loans, Amortized Cost Basis by Origination Year, 2024	54,025	456,334
Term Loans, Amortized Cost Basis by Origination Year, 2023	504,820	953,501
Term Loans, Amortized Cost Basis by Origination Year, 2022	937,290	966,402
Term Loans, Amortized Cost Basis by Origination Year, 2021	1,017,973	618,003
Term Loans, Amortized Cost Basis by Origination Year, 2020	625,603	323,344
Term Loans, Amortized Cost Basis by Origination Year, Prior	653,818	367,010
Revolving Loans	64,938	65,486
Revolving Loans Converted to Term Loans	4,158	48,924
Notes Receivable Gross	3,862,625	3,799,004
Commercial Real Estate - Income Producing [Member] | Pass-Watch [Member]
Accounts Notes And Loans Receivable [Line Items]
Term Loans, Amortized Cost Basis by Origination Year, 2024	13,301	9,469
Term Loans, Amortized Cost Basis by Origination Year, 2023	6,622	3,064
Term Loans, Amortized Cost Basis by Origination Year, 2022	4,047	3,886
Term Loans, Amortized Cost Basis by Origination Year, 2021	4,163	75,182
Term Loans, Amortized Cost Basis by Origination Year, 2020	70,889	23,827
Term Loans, Amortized Cost Basis by Origination Year, Prior	33,226	22,504
Revolving Loans	2,000	2,000
Notes Receivable Gross	134,248	139,932
Commercial Real Estate - Income Producing [Member] | Special Mention [Member]
Accounts Notes And Loans Receivable [Line Items]
Term Loans, Amortized Cost Basis by Origination Year, 2024		156
Term Loans, Amortized Cost Basis by Origination Year, 2023	448	32,255
Term Loans, Amortized Cost Basis by Origination Year, 2021		354
Term Loans, Amortized Cost Basis by Origination Year, Prior	6,266	8,061
Notes Receivable Gross	6,714	40,826
Commercial Real Estate - Income Producing [Member] | Substandard [Member]
Accounts Notes And Loans Receivable [Line Items]
Term Loans, Amortized Cost Basis by Origination Year, 2024		4,086
Term Loans, Amortized Cost Basis by Origination Year, 2023	4,086	1,921
Term Loans, Amortized Cost Basis by Origination Year, 2022	34,278	286
Term Loans, Amortized Cost Basis by Origination Year, 2021	286
Term Loans, Amortized Cost Basis by Origination Year, 2020		122
Term Loans, Amortized Cost Basis by Origination Year, Prior	560	766
Notes Receivable Gross	39,210	7,181
Commercial Real Estate - Income Producing [Member] | Gross Charge-offs [Member]
Accounts Notes And Loans Receivable [Line Items]
Term Loans, Amortized Cost Basis by Origination Year, 2024		73
Term Loans, Amortized Cost Basis by Origination Year, 2022	8,819
Notes Receivable Gross	8,819	73
Commercial Real Estate - Income Producing [Member] | Total Commercial [Member]
Accounts Notes And Loans Receivable [Line Items]
Notes Receivable Gross	4,042,797	3,986,943
Commercial Real Estate - Income Producing [Member] | Total Commercial [Member] | Pass [Member]
Accounts Notes And Loans Receivable [Line Items]
Notes Receivable Gross	3,862,625	3,799,004
Commercial Real Estate - Income Producing [Member] | Total Commercial [Member] | Pass-Watch [Member]
Accounts Notes And Loans Receivable [Line Items]
Notes Receivable Gross	134,248	139,932
Commercial Real Estate - Income Producing [Member] | Total Commercial [Member] | Special Mention [Member]
Accounts Notes And Loans Receivable [Line Items]
Notes Receivable Gross	6,714	40,826
Commercial Real Estate - Income Producing [Member] | Total Commercial [Member] | Substandard [Member]
Accounts Notes And Loans Receivable [Line Items]
Notes Receivable Gross	39,210	7,181
Construction and Land Development [Member]
Accounts Notes And Loans Receivable [Line Items]
Term Loans, Amortized Cost Basis by Origination Year, 2024	70,758	391,814
Term Loans, Amortized Cost Basis by Origination Year, 2023	420,114	679,594
Term Loans, Amortized Cost Basis by Origination Year, 2022	648,514	248,959
Term Loans, Amortized Cost Basis by Origination Year, 2021	181,480	62,218
Term Loans, Amortized Cost Basis by Origination Year, 2020	37,042	6,207
Term Loans, Amortized Cost Basis by Origination Year, Prior	22,168	19,436
Revolving Loans	156,708	140,094
Revolving Loans Converted to Term Loans	4,989	2,769
Notes Receivable Gross	1,541,773	1,551,091
Construction and Land Development [Member] | Pass [Member]
Accounts Notes And Loans Receivable [Line Items]
Term Loans, Amortized Cost Basis by Origination Year, 2024	70,758	388,453
Term Loans, Amortized Cost Basis by Origination Year, 2023	418,296	676,687
Term Loans, Amortized Cost Basis by Origination Year, 2022	635,714	248,036
Term Loans, Amortized Cost Basis by Origination Year, 2021	176,967	62,086
Term Loans, Amortized Cost Basis by Origination Year, 2020	36,935	6,008
Term Loans, Amortized Cost Basis by Origination Year, Prior	21,652	18,834
Revolving Loans	156,207	139,587
Revolving Loans Converted to Term Loans	4,989	2,769
Notes Receivable Gross	1,521,518	1,542,460
Construction and Land Development [Member] | Pass-Watch [Member]
Accounts Notes And Loans Receivable [Line Items]
Term Loans, Amortized Cost Basis by Origination Year, 2024		3,067
Term Loans, Amortized Cost Basis by Origination Year, 2023	1,385	2,820
Term Loans, Amortized Cost Basis by Origination Year, 2022	11,727	827
Term Loans, Amortized Cost Basis by Origination Year, 2021	4,416	83
Term Loans, Amortized Cost Basis by Origination Year, 2020	64	128
Term Loans, Amortized Cost Basis by Origination Year, Prior	230	323
Revolving Loans	205	212
Notes Receivable Gross	18,027	7,460
Construction and Land Development [Member] | Special Mention [Member]
Accounts Notes And Loans Receivable [Line Items]
Term Loans, Amortized Cost Basis by Origination Year, 2024		294
Term Loans, Amortized Cost Basis by Origination Year, 2020		62
Notes Receivable Gross		356
Construction and Land Development [Member] | Substandard [Member]
Accounts Notes And Loans Receivable [Line Items]
Term Loans, Amortized Cost Basis by Origination Year, 2023	433	87
Term Loans, Amortized Cost Basis by Origination Year, 2022	1,073	96
Term Loans, Amortized Cost Basis by Origination Year, 2021	97	49
Term Loans, Amortized Cost Basis by Origination Year, 2020	43	9
Term Loans, Amortized Cost Basis by Origination Year, Prior	286	279
Revolving Loans	296	295
Notes Receivable Gross	2,228	815
Construction and Land Development [Member] | Gross Charge-offs [Member]
Accounts Notes And Loans Receivable [Line Items]
Term Loans, Amortized Cost Basis by Origination Year, 2023		7
Term Loans, Amortized Cost Basis by Origination Year, 2022	75	54
Term Loans, Amortized Cost Basis by Origination Year, Prior		11
Notes Receivable Gross	75	72
Construction and Land Development [Member] | Total Commercial [Member]
Accounts Notes And Loans Receivable [Line Items]
Notes Receivable Gross	1,541,773	1,551,091
Construction and Land Development [Member] | Total Commercial [Member] | Pass [Member]
Accounts Notes And Loans Receivable [Line Items]
Notes Receivable Gross	1,521,518	1,542,460
Construction and Land Development [Member] | Total Commercial [Member] | Pass-Watch [Member]
Accounts Notes And Loans Receivable [Line Items]
Notes Receivable Gross	18,027	7,460
Construction and Land Development [Member] | Total Commercial [Member] | Special Mention [Member]
Accounts Notes And Loans Receivable [Line Items]
Notes Receivable Gross	0	356
Construction and Land Development [Member] | Total Commercial [Member] | Substandard [Member]
Accounts Notes And Loans Receivable [Line Items]
Notes Receivable Gross	$ 2,228	$ 815