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Loans and Allowance for Credit Losses - Schedule of Risk Rating and Payment Performance (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Risk Category Of Loans [Line Items]
Total loans	$ 31,123,641	$ 13,601,846
Segment Portfolio Reclassification, Adjusted Balance
Risk Category Of Loans [Line Items]
Total loans	31,123,641	13,601,846
Commercial
Risk Category Of Loans [Line Items]
Total loans	9,508,904	3,391,769
Commercial | Segment Portfolio Reclassification, Adjusted Balance
Risk Category Of Loans [Line Items]
Originated in current fiscal year	2,473,145	944,296
Originated one year before current year	1,851,604	589,907
Originated two years before current year	880,723	289,294
Originated three years before current year	802,628	112,326
Originated four years before current year	382,993	171,251
Originated more than five years before current fiscal year	423,484	244,517
Revolving	2,118,835	689,957
Revolving to Term	365,212	158,664
Total loans	9,298,624	3,200,212
Commercial real estate
Risk Category Of Loans [Line Items]
Total loans	12,457,070	6,380,674
Commercial real estate | Segment Portfolio Reclassification, Adjusted Balance
Risk Category Of Loans [Line Items]
Originated in current fiscal year	3,193,582	1,596,481
Originated one year before current year	2,928,035	1,514,176
Originated two years before current year	2,050,913	898,738
Originated three years before current year	1,384,735	492,535
Originated four years before current year	823,735	516,592
Originated more than five years before current fiscal year	1,139,730	666,606
Revolving	57,818	45,215
Revolving to Term	720,200	491,141
Total loans	12,298,748	6,221,484
BBCC | Segment Portfolio Reclassification, Adjusted Balance
Risk Category Of Loans [Line Items]
Originated in current fiscal year	92,738	83,314
Originated one year before current year	64,973	71,056
Originated two years before current year	53,229	55,784
Originated three years before current year	38,138	36,019
Originated four years before current year	24,464	25,366
Originated more than five years before current fiscal year	11,690	9,133
Revolving	61,565	48,344
Revolving to Term	21,805	21,731
Total loans	368,602	350,747
Residential real estate
Risk Category Of Loans [Line Items]
Originated in current fiscal year	1,327,227	625,678
Originated one year before current year	1,946,321	632,870
Originated two years before current year	1,826,623	272,766
Originated three years before current year	479,402	73,116
Originated four years before current year	138,086	104,721
Originated more than five years before current fiscal year	742,687	546,021
Revolving	7	12
Revolving to Term	88	105
Total loans	6,460,441	2,255,289
Residential real estate | Segment Portfolio Reclassification, Adjusted Balance
Risk Category Of Loans [Line Items]
Total loans	6,460,441	2,255,289
Residential real estate | Performing
Risk Category Of Loans [Line Items]
Originated in current fiscal year	1,327,168	625,582
Originated one year before current year	1,945,792	632,705
Originated two years before current year	1,825,762	272,600
Originated three years before current year	478,529	72,766
Originated four years before current year	136,260	103,866
Originated more than five years before current fiscal year	712,175	529,293
Revolving	7	12
Revolving to Term	88	105
Total loans	6,425,781	2,236,929
Residential real estate | Nonperforming
Risk Category Of Loans [Line Items]
Originated in current fiscal year	59	96
Originated one year before current year	529	165
Originated two years before current year	861	166
Originated three years before current year	873	350
Originated four years before current year	1,826	855
Originated more than five years before current fiscal year	30,512	16,728
Revolving	0	0
Revolving to Term	0	0
Total loans	34,660	18,360
Indirect
Risk Category Of Loans [Line Items]
Originated in current fiscal year	504,758	361,747
Originated one year before current year	250,481	231,680
Originated two years before current year	144,910	147,592
Originated three years before current year	82,835	69,023
Originated four years before current year	31,788	42,028
Originated more than five years before current fiscal year	19,423	21,060
Revolving	0	0
Revolving to Term	62	9
Total loans	1,034,257	873,139
Indirect | Segment Portfolio Reclassification, Adjusted Balance
Risk Category Of Loans [Line Items]
Total loans	1,034,257	873,139
Indirect | Performing
Risk Category Of Loans [Line Items]
Originated in current fiscal year	504,410	361,485
Originated one year before current year	249,407	231,156
Originated two years before current year	144,265	146,978
Originated three years before current year	82,304	68,513
Originated four years before current year	31,484	41,598
Originated more than five years before current fiscal year	19,095	20,819
Revolving	0	0
Revolving to Term	62	9
Total loans	1,031,027	870,558
Indirect | Nonperforming
Risk Category Of Loans [Line Items]
Originated in current fiscal year	348	262
Originated one year before current year	1,074	524
Originated two years before current year	645	614
Originated three years before current year	531	510
Originated four years before current year	304	430
Originated more than five years before current fiscal year	328	241
Revolving	0	0
Revolving to Term	0	0
Total loans	3,230	2,581
Direct
Risk Category Of Loans [Line Items]
Originated in current fiscal year	133,049	34,071
Originated one year before current year	164,977	16,188
Originated two years before current year	78,020	14,526
Originated three years before current year	58,124	14,712
Originated four years before current year	45,626	7,467
Originated more than five years before current fiscal year	60,738	16,367
Revolving	87,627	36,854
Revolving to Term	1,025	200
Total loans	629,186	140,385
Direct | Segment Portfolio Reclassification, Adjusted Balance
Risk Category Of Loans [Line Items]
Total loans	629,186	140,385
Direct | Performing
Risk Category Of Loans [Line Items]
Originated in current fiscal year	132,934	34,058
Originated one year before current year	164,126	16,135
Originated two years before current year	77,406	14,396
Originated three years before current year	57,919	14,579
Originated four years before current year	45,299	7,432
Originated more than five years before current fiscal year	59,212	15,831
Revolving	87,622	36,812
Revolving to Term	671	192
Total loans	625,189	139,435
Direct | Nonperforming
Risk Category Of Loans [Line Items]
Originated in current fiscal year	115	13
Originated one year before current year	851	53
Originated two years before current year	614	130
Originated three years before current year	205	133
Originated four years before current year	327	35
Originated more than five years before current fiscal year	1,526	536
Revolving	5	42
Revolving to Term	354	8
Total loans	3,997	950
Home equity
Risk Category Of Loans [Line Items]
Originated in current fiscal year	1,085	0
Originated one year before current year	1,056	0
Originated two years before current year	2,015	649
Originated three years before current year	1,943	358
Originated four years before current year	1,777	576
Originated more than five years before current fiscal year	15,954	1
Revolving	991,699	539,315
Revolving to Term	18,254	19,691
Total loans	1,033,783	560,590
Home equity | Segment Portfolio Reclassification, Adjusted Balance
Risk Category Of Loans [Line Items]
Total loans	1,033,783	560,590
Home equity | Performing
Risk Category Of Loans [Line Items]
Originated in current fiscal year	919	0
Originated one year before current year	896	0
Originated two years before current year	1,849	633
Originated three years before current year	1,497	349
Originated four years before current year	983	535
Originated more than five years before current fiscal year	11,646	0
Revolving	990,001	539,057
Revolving to Term	14,792	16,768
Total loans	1,022,583	557,342
Home equity | Nonperforming
Risk Category Of Loans [Line Items]
Originated in current fiscal year	166	0
Originated one year before current year	160	0
Originated two years before current year	166	16
Originated three years before current year	446	9
Originated four years before current year	794	41
Originated more than five years before current fiscal year	4,308	1
Revolving	1,698	258
Revolving to Term	3,462	2,923
Total loans	11,200	3,248
Pass | Commercial | Segment Portfolio Reclassification, Adjusted Balance
Risk Category Of Loans [Line Items]
Originated in current fiscal year	2,388,618	918,456
Originated one year before current year	1,754,364	563,869
Originated two years before current year	796,340	271,158
Originated three years before current year	738,208	98,468
Originated four years before current year	362,986	156,136
Originated more than five years before current fiscal year	388,617	235,639
Revolving	1,988,763	667,628
Revolving to Term	329,119	130,470
Total loans	8,747,015	3,041,824
Pass | Commercial real estate | Segment Portfolio Reclassification, Adjusted Balance
Risk Category Of Loans [Line Items]
Originated in current fiscal year	3,066,960	1,555,880
Originated one year before current year	2,828,758	1,474,271
Originated two years before current year	1,989,000	846,921
Originated three years before current year	1,219,025	481,508
Originated four years before current year	675,572	462,176
Originated more than five years before current fiscal year	1,018,719	611,680
Revolving	57,818	42,609
Revolving to Term	689,553	451,544
Total loans	11,545,405	5,926,589
Pass | BBCC | Segment Portfolio Reclassification, Adjusted Balance
Risk Category Of Loans [Line Items]
Originated in current fiscal year	90,341	81,710
Originated one year before current year	64,161	69,749
Originated two years before current year	52,304	54,580
Originated three years before current year	36,868	34,461
Originated four years before current year	23,618	25,113
Originated more than five years before current fiscal year	11,333	8,296
Revolving	60,016	47,571
Revolving to Term	18,881	18,778
Total loans	357,522	340,258
Criticized | Commercial | Segment Portfolio Reclassification, Adjusted Balance
Risk Category Of Loans [Line Items]
Originated in current fiscal year	40,856	9,998
Originated one year before current year	30,661	7,885
Originated two years before current year	63,557	6,660
Originated three years before current year	33,490	0
Originated four years before current year	9,195	7,809
Originated more than five years before current fiscal year	5,312	2,658
Revolving	61,036	14,601
Revolving to Term	4,327	10,076
Total loans	248,434	59,687
Criticized | Commercial real estate | Segment Portfolio Reclassification, Adjusted Balance
Risk Category Of Loans [Line Items]
Originated in current fiscal year	75,306	27,622
Originated one year before current year	34,422	24,790
Originated two years before current year	22,569	39,914
Originated three years before current year	82,637	0
Originated four years before current year	86,504	21,614
Originated more than five years before current fiscal year	56,864	22,157
Revolving	0	0
Revolving to Term	23,282	34,387
Total loans	381,584	170,484
Criticized | BBCC | Segment Portfolio Reclassification, Adjusted Balance
Risk Category Of Loans [Line Items]
Originated in current fiscal year	1,504	1,320
Originated one year before current year	525	1,170
Originated two years before current year	368	841
Originated three years before current year	692	160
Originated four years before current year	353	0
Originated more than five years before current fiscal year	0	0
Revolving	1,006	670
Revolving to Term	1,603	1,578
Total loans	6,051	5,739
Substandard | Commercial | Segment Portfolio Reclassification, Adjusted Balance
Risk Category Of Loans [Line Items]
Originated in current fiscal year	37,223	14,773
Originated one year before current year	47,522	14,468
Originated two years before current year	16,540	10,200
Originated three years before current year	22,925	9,849
Originated four years before current year	4,844	5,521
Originated more than five years before current fiscal year	21,204	945
Revolving	67,402	6,883
Revolving to Term	25,143	10,322
Total loans	242,803	72,961
Substandard | Commercial real estate | Segment Portfolio Reclassification, Adjusted Balance
Risk Category Of Loans [Line Items]
Originated in current fiscal year	46,231	4,706
Originated one year before current year	16,928	12,118
Originated two years before current year	24,319	9,933
Originated three years before current year	78,468	9,058
Originated four years before current year	57,824	18,165
Originated more than five years before current fiscal year	21,591	11,351
Revolving	0	2,291
Revolving to Term	4,108	4,339
Total loans	249,469	71,961
Substandard | BBCC | Segment Portfolio Reclassification, Adjusted Balance
Risk Category Of Loans [Line Items]
Originated in current fiscal year	811	284
Originated one year before current year	143	24
Originated two years before current year	0	79
Originated three years before current year	421	7
Originated four years before current year	0	187
Originated more than five years before current fiscal year	0	465
Revolving	543	103
Revolving to Term	682	239
Total loans	2,600	1,388
Nonaccrual | Commercial | Segment Portfolio Reclassification, Adjusted Balance
Risk Category Of Loans [Line Items]
Originated in current fiscal year	3,627	1,069
Originated one year before current year	1,453	3,507
Originated two years before current year	566	1,276
Originated three years before current year	0	3,721
Originated four years before current year	0	1,448
Originated more than five years before current fiscal year	0	0
Revolving	1,634	845
Revolving to Term	6,623	7,796
Total loans	13,903	19,662
Nonaccrual | Commercial real estate | Segment Portfolio Reclassification, Adjusted Balance
Risk Category Of Loans [Line Items]
Originated in current fiscal year	3,151	1,620
Originated one year before current year	9,541	2,997
Originated two years before current year	5,014	0
Originated three years before current year	0	1,627
Originated four years before current year	2,312	3,419
Originated more than five years before current fiscal year	22,155	8,905
Revolving	0	315
Revolving to Term	3,257	871
Total loans	45,430	19,754
Nonaccrual | BBCC | Segment Portfolio Reclassification, Adjusted Balance
Risk Category Of Loans [Line Items]
Originated in current fiscal year	42	0
Originated one year before current year	37	88
Originated two years before current year	118	0
Originated three years before current year	0	0
Originated four years before current year	429	66
Originated more than five years before current fiscal year	284	162
Revolving	0	0
Revolving to Term	639	1,136
Total loans	1,549	1,452
Doubtful | Commercial | Segment Portfolio Reclassification, Adjusted Balance
Risk Category Of Loans [Line Items]
Originated in current fiscal year	2,821	0
Originated one year before current year	17,604	178
Originated two years before current year	3,720	0
Originated three years before current year	8,005	288
Originated four years before current year	5,968	337
Originated more than five years before current fiscal year	8,351	5,275
Revolving	0	0
Revolving to Term	0	0
Total loans	46,469	6,078
Doubtful | Commercial real estate | Segment Portfolio Reclassification, Adjusted Balance
Risk Category Of Loans [Line Items]
Originated in current fiscal year	1,934	6,653
Originated one year before current year	38,386	0
Originated two years before current year	10,011	1,970
Originated three years before current year	4,605	342
Originated four years before current year	1,523	11,218
Originated more than five years before current fiscal year	20,401	12,513
Revolving	0	0
Revolving to Term	0	0
Total loans	76,860	32,696
Doubtful | BBCC | Segment Portfolio Reclassification, Adjusted Balance
Risk Category Of Loans [Line Items]
Originated in current fiscal year	40	0
Originated one year before current year	107	25
Originated two years before current year	439	284
Originated three years before current year	157	1,391
Originated four years before current year	64	0
Originated more than five years before current fiscal year	73	210
Revolving	0	0
Revolving to Term	0	0
Total loans	$ 880	$ 1,910

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