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Loans and Allowance for Credit Losses - Schedule of Risk Rating and Payment Performance (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	$ 29,553,648	$ 13,601,846
Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	29,553,648	13,601,846
Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	8,923,983	3,391,769
Commercial | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Credit Quality Indicator [Line Items]
Originated in current fiscal year	1,122,264	944,296
Originated one year before current year	2,043,379	589,907
Originated two years before current year	1,052,656	289,294
Originated three years before current year	963,185	112,326
Originated four years before current year	471,735	171,251
Originated more than five years before current fiscal year	509,940	244,517
Revolving	2,413,756	689,957
Revolving to Term	155,072	158,664
Total loans	8,731,987	3,200,212
Commercial real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	11,796,503	6,380,674
Commercial real estate | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Credit Quality Indicator [Line Items]
Originated in current fiscal year	1,648,243	1,596,481
Originated one year before current year	2,905,734	1,514,176
Originated two years before current year	2,291,098	898,738
Originated three years before current year	1,572,618	492,535
Originated four years before current year	993,117	516,592
Originated more than five years before current fiscal year	1,582,063	666,606
Revolving	166,127	45,215
Revolving to Term	482,734	491,141
Total loans	11,641,734	6,221,484
BBCC | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Credit Quality Indicator [Line Items]
Originated in current fiscal year	45,331	83,314
Originated one year before current year	75,178	71,056
Originated two years before current year	61,225	55,784
Originated three years before current year	46,756	36,019
Originated four years before current year	28,750	25,366
Originated more than five years before current fiscal year	20,491	9,133
Revolving	47,436	48,344
Revolving to Term	21,598	21,731
Total loans	346,765	350,747
Residential real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Originated in current fiscal year	1,316,193	625,678
Originated one year before current year	1,383,341	632,870
Originated two years before current year	1,895,725	272,766
Originated three years before current year	508,225	73,116
Originated four years before current year	148,717	104,721
Originated more than five years before current fiscal year	815,897	546,021
Revolving	10,863	12
Revolving to Term	96	105
Total loans	6,079,057	2,255,289
Residential real estate | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	6,079,057	2,255,289
Residential real estate | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Originated in current fiscal year	1,316,193	625,582
Originated one year before current year	1,383,143	632,705
Originated two years before current year	1,895,059	272,600
Originated three years before current year	507,638	72,766
Originated four years before current year	147,478	103,866
Originated more than five years before current fiscal year	786,725	529,293
Revolving	10,863	12
Revolving to Term	96	105
Total loans	6,047,195	2,236,929
Residential real estate | Nonperforming
Financing Receivable, Credit Quality Indicator [Line Items]
Originated in current fiscal year	0	96
Originated one year before current year	198	165
Originated two years before current year	666	166
Originated three years before current year	587	350
Originated four years before current year	1,239	855
Originated more than five years before current fiscal year	29,172	16,728
Revolving	0	0
Revolving to Term	0	0
Total loans	31,862	18,360
Indirect
Financing Receivable, Credit Quality Indicator [Line Items]
Originated in current fiscal year	305,567	361,747
Originated one year before current year	302,939	231,680
Originated two years before current year	181,331	147,592
Originated three years before current year	109,565	69,023
Originated four years before current year	46,728	42,028
Originated more than five years before current fiscal year	35,610	21,060
Revolving	0	0
Revolving to Term	1	9
Total loans	981,741	873,139
Indirect | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	981,741	873,139
Indirect | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Originated in current fiscal year	305,501	361,485
Originated one year before current year	302,525	231,156
Originated two years before current year	180,812	146,978
Originated three years before current year	109,194	68,513
Originated four years before current year	46,379	41,598
Originated more than five years before current fiscal year	35,067	20,819
Revolving	0	0
Revolving to Term	1	9
Total loans	979,479	870,558
Indirect | Nonperforming
Financing Receivable, Credit Quality Indicator [Line Items]
Originated in current fiscal year	66	262
Originated one year before current year	414	524
Originated two years before current year	519	614
Originated three years before current year	371	510
Originated four years before current year	349	430
Originated more than five years before current fiscal year	543	241
Revolving	0	0
Revolving to Term	0	0
Total loans	2,262	2,581
Direct
Financing Receivable, Credit Quality Indicator [Line Items]
Originated in current fiscal year	91,697	34,071
Originated one year before current year	188,510	16,188
Originated two years before current year	100,647	14,526
Originated three years before current year	78,488	14,712
Originated four years before current year	58,500	7,467
Originated more than five years before current fiscal year	52,422	16,367
Revolving	104,082	36,854
Revolving to Term	166	200
Total loans	674,512	140,385
Direct | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	674,512	140,385
Direct | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Originated in current fiscal year	91,675	34,058
Originated one year before current year	188,063	16,135
Originated two years before current year	100,504	14,396
Originated three years before current year	78,199	14,579
Originated four years before current year	58,343	7,432
Originated more than five years before current fiscal year	50,906	15,831
Revolving	103,998	36,812
Revolving to Term	38	192
Total loans	671,726	139,435
Direct | Nonperforming
Financing Receivable, Credit Quality Indicator [Line Items]
Originated in current fiscal year	22	13
Originated one year before current year	447	53
Originated two years before current year	143	130
Originated three years before current year	289	133
Originated four years before current year	157	35
Originated more than five years before current fiscal year	1,516	536
Revolving	84	42
Revolving to Term	128	8
Total loans	2,786	950
Home equity
Financing Receivable, Credit Quality Indicator [Line Items]
Originated in current fiscal year	11,875	0
Originated one year before current year	11,855	0
Originated two years before current year	8,171	649
Originated three years before current year	14,534	358
Originated four years before current year	13,669	576
Originated more than five years before current fiscal year	44,455	1
Revolving	975,628	539,315
Revolving to Term	17,665	19,691
Total loans	1,097,852	560,590
Home equity | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	1,097,852	560,590
Home equity | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Originated in current fiscal year	11,875	0
Originated one year before current year	11,855	0
Originated two years before current year	8,137	633
Originated three years before current year	14,518	349
Originated four years before current year	13,076	535
Originated more than five years before current fiscal year	36,231	0
Revolving	975,416	539,057
Revolving to Term	14,702	16,768
Total loans	1,085,810	557,342
Home equity | Nonperforming
Financing Receivable, Credit Quality Indicator [Line Items]
Originated in current fiscal year	0	0
Originated one year before current year	0	0
Originated two years before current year	34	16
Originated three years before current year	16	9
Originated four years before current year	593	41
Originated more than five years before current fiscal year	8,224	1
Revolving	212	258
Revolving to Term	2,963	2,923
Total loans	12,042	3,248
Pass | Commercial | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Credit Quality Indicator [Line Items]
Originated in current fiscal year	1,085,570	918,456
Originated one year before current year	1,982,733	563,869
Originated two years before current year	1,016,391	271,158
Originated three years before current year	888,392	98,468
Originated four years before current year	426,282	156,136
Originated more than five years before current fiscal year	467,789	235,639
Revolving	2,313,545	667,628
Revolving to Term	132,149	130,470
Total loans	8,312,851	3,041,824
Pass | Commercial real estate | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Credit Quality Indicator [Line Items]
Originated in current fiscal year	1,552,841	1,555,880
Originated one year before current year	2,787,599	1,474,271
Originated two years before current year	2,234,315	846,921
Originated three years before current year	1,472,777	481,508
Originated four years before current year	867,430	462,176
Originated more than five years before current fiscal year	1,446,189	611,680
Revolving	163,533	42,609
Revolving to Term	443,935	451,544
Total loans	10,968,619	5,926,589
Pass | BBCC | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Credit Quality Indicator [Line Items]
Originated in current fiscal year	44,590	81,710
Originated one year before current year	73,821	69,749
Originated two years before current year	60,244	54,580
Originated three years before current year	45,049	34,461
Originated four years before current year	28,071	25,113
Originated more than five years before current fiscal year	20,216	8,296
Revolving	46,062	47,571
Revolving to Term	19,013	18,778
Total loans	337,066	340,258
Criticized | Commercial | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Credit Quality Indicator [Line Items]
Originated in current fiscal year	5,285	9,998
Originated one year before current year	23,442	7,885
Originated two years before current year	17,524	6,660
Originated three years before current year	28,488	0
Originated four years before current year	15,752	7,809
Originated more than five years before current fiscal year	10,798	2,658
Revolving	48,442	14,601
Revolving to Term	1,352	10,076
Total loans	151,083	59,687
Criticized | Commercial real estate | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Credit Quality Indicator [Line Items]
Originated in current fiscal year	43,201	27,622
Originated one year before current year	31,765	24,790
Originated two years before current year	18,257	39,914
Originated three years before current year	51,824	0
Originated four years before current year	66,566	21,614
Originated more than five years before current fiscal year	50,919	22,157
Revolving	0	0
Revolving to Term	33,801	34,387
Total loans	296,333	170,484
Criticized | BBCC | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Credit Quality Indicator [Line Items]
Originated in current fiscal year	669	1,320
Originated one year before current year	1,083	1,170
Originated two years before current year	667	841
Originated three years before current year	744	160
Originated four years before current year	270	0
Originated more than five years before current fiscal year	0	0
Revolving	451	670
Revolving to Term	1,535	1,578
Total loans	5,419	5,739
Substandard | Commercial | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Credit Quality Indicator [Line Items]
Originated in current fiscal year	31,062	14,773
Originated one year before current year	33,265	14,468
Originated two years before current year	16,647	10,200
Originated three years before current year	44,642	9,849
Originated four years before current year	25,021	5,521
Originated more than five years before current fiscal year	15,349	945
Revolving	41,626	6,883
Revolving to Term	18,092	10,322
Total loans	225,704	72,961
Substandard | Commercial real estate | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Credit Quality Indicator [Line Items]
Originated in current fiscal year	51,283	4,706
Originated one year before current year	36,711	12,118
Originated two years before current year	22,940	9,933
Originated three years before current year	47,348	9,058
Originated four years before current year	55,284	18,165
Originated more than five years before current fiscal year	35,047	11,351
Revolving	2,291	2,291
Revolving to Term	4,212	4,339
Total loans	255,116	71,961
Substandard | BBCC | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Credit Quality Indicator [Line Items]
Originated in current fiscal year	72	284
Originated one year before current year	274	24
Originated two years before current year	13	79
Originated three years before current year	576	7
Originated four years before current year	0	187
Originated more than five years before current fiscal year	152	465
Revolving	923	103
Revolving to Term	313	239
Total loans	2,323	1,388
Nonaccrual | Commercial | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Credit Quality Indicator [Line Items]
Originated in current fiscal year	347	1,069
Originated one year before current year	3,640	3,507
Originated two years before current year	1,164	1,276
Originated three years before current year	1,071	3,721
Originated four years before current year	1	1,448
Originated more than five years before current fiscal year	0	0
Revolving	2,402	845
Revolving to Term	3,479	7,796
Total loans	12,104	19,662
Nonaccrual | Commercial real estate | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Credit Quality Indicator [Line Items]
Originated in current fiscal year	918	1,620
Originated one year before current year	12,535	2,997
Originated two years before current year	3,545	0
Originated three years before current year	0	1,627
Originated four years before current year	2,666	3,419
Originated more than five years before current fiscal year	7,285	8,905
Revolving	303	315
Revolving to Term	786	871
Total loans	28,038	19,754
Nonaccrual | BBCC | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Credit Quality Indicator [Line Items]
Originated in current fiscal year	0	0
Originated one year before current year	0	88
Originated two years before current year	276	0
Originated three years before current year	0	0
Originated four years before current year	45	66
Originated more than five years before current fiscal year	0	162
Revolving	0	0
Revolving to Term	737	1,136
Total loans	1,058	1,452
Doubtful | Commercial | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Credit Quality Indicator [Line Items]
Originated in current fiscal year	0	0
Originated one year before current year	299	178
Originated two years before current year	930	0
Originated three years before current year	592	288
Originated four years before current year	4,679	337
Originated more than five years before current fiscal year	16,004	5,275
Revolving	7,741	0
Revolving to Term	0	0
Total loans	30,245	6,078
Doubtful | Commercial real estate | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Credit Quality Indicator [Line Items]
Originated in current fiscal year	0	6,653
Originated one year before current year	37,124	0
Originated two years before current year	12,041	1,970
Originated three years before current year	669	342
Originated four years before current year	1,171	11,218
Originated more than five years before current fiscal year	42,623	12,513
Revolving	0	0
Revolving to Term	0	0
Total loans	93,628	32,696
Doubtful | BBCC | Segment Portfolio Reclassification, Adjusted Balance
Financing Receivable, Credit Quality Indicator [Line Items]
Originated in current fiscal year	0	0
Originated one year before current year	0	25
Originated two years before current year	25	284
Originated three years before current year	387	1,391
Originated four years before current year	364	0
Originated more than five years before current fiscal year	123	210
Revolving	0	0
Revolving to Term	0	0
Total loans	$ 899	$ 1,910

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