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Loans and Allowance for Credit Losses - Schedule of Risk Rating and Payment Performance (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Risk Category Of Loans [Line Items]
Total loans	$ 13,601,846	$ 13,786,479
Segment Portfolio Reclassification, Adjusted Balance
Risk Category Of Loans [Line Items]
Total loans	13,601,846	13,786,479
Commercial
Risk Category Of Loans [Line Items]
Total loans	3,391,769	3,956,422
Commercial | Segment Portfolio Reclassification, Adjusted Balance
Risk Category Of Loans [Line Items]
Originated in current fiscal year	944,296	1,709,047
Originated one year before current year	589,907	440,462
Originated two years before current year	289,294	202,025
Originated three years before current year	112,326	256,753
Originated four years before current year	171,251	130,543
Originated more than five years before current fiscal year	244,517	281,337
Revolving	689,957	576,278
Revolving to Term	158,664	161,255
Total loans	3,200,212	3,757,700
Commercial real estate
Risk Category Of Loans [Line Items]
Total loans	6,380,674	5,946,512
Commercial real estate | Segment Portfolio Reclassification, Adjusted Balance
Risk Category Of Loans [Line Items]
Originated in current fiscal year	1,596,481	1,556,959
Originated one year before current year	1,514,176	1,099,162
Originated two years before current year	898,738	794,524
Originated three years before current year	492,535	779,186
Originated four years before current year	516,592	539,960
Originated more than five years before current fiscal year	666,606	571,651
Revolving	45,215	28,122
Revolving to Term	491,141	405,247
Total loans	6,221,484	5,774,811
BBCC | Segment Portfolio Reclassification, Adjusted Balance
Risk Category Of Loans [Line Items]
Originated in current fiscal year	83,314	96,821
Originated one year before current year	71,056	77,287
Originated two years before current year	55,784	51,672
Originated three years before current year	36,019	37,218
Originated four years before current year	25,366	25,622
Originated more than five years before current fiscal year	9,133	5,357
Revolving	48,344	53,667
Revolving to Term	21,731	22,779
Total loans	350,747	370,423
Residential real estate
Risk Category Of Loans [Line Items]
Originated in current fiscal year	625,678	624,500
Originated one year before current year	632,870	453,383
Originated two years before current year	272,766	132,787
Originated three years before current year	73,116	191,268
Originated four years before current year	104,721	204,588
Originated more than five years before current fiscal year	546,021	641,774
Revolving	12	0
Revolving to Term	105	122
Total loans	2,255,289	2,248,422
Residential real estate | Segment Portfolio Reclassification, Adjusted Balance
Risk Category Of Loans [Line Items]
Total loans	2,255,289	2,248,422
Residential real estate | Performing
Risk Category Of Loans [Line Items]
Originated in current fiscal year	625,582	624,435
Originated one year before current year	632,705	453,132
Originated two years before current year	272,600	132,107
Originated three years before current year	72,766	190,376
Originated four years before current year	103,866	202,457
Originated more than five years before current fiscal year	529,293	620,999
Revolving	12	0
Revolving to Term	105	122
Total loans	2,236,929	2,223,628
Residential real estate | Nonperforming
Risk Category Of Loans [Line Items]
Originated in current fiscal year	96	65
Originated one year before current year	165	251
Originated two years before current year	166	680
Originated three years before current year	350	892
Originated four years before current year	855	2,131
Originated more than five years before current fiscal year	16,728	20,775
Revolving	0	0
Revolving to Term	0	0
Total loans	18,360	24,794
Indirect
Risk Category Of Loans [Line Items]
Originated in current fiscal year	361,747	353,011
Originated one year before current year	231,680	253,957
Originated two years before current year	147,592	135,670
Originated three years before current year	69,023	97,253
Originated four years before current year	42,028	52,654
Originated more than five years before current fiscal year	21,060	21,280
Revolving	0	0
Revolving to Term	9	77
Total loans	873,139	913,902
Indirect | Segment Portfolio Reclassification, Adjusted Balance
Risk Category Of Loans [Line Items]
Total loans	873,139	913,902
Indirect | Performing
Risk Category Of Loans [Line Items]
Originated in current fiscal year	361,485	352,989
Originated one year before current year	231,156	253,514
Originated two years before current year	146,978	134,893
Originated three years before current year	68,513	96,587
Originated four years before current year	41,598	52,225
Originated more than five years before current fiscal year	20,819	21,088
Revolving	0	0
Revolving to Term	9	77
Total loans	870,558	911,373
Indirect | Nonperforming
Risk Category Of Loans [Line Items]
Originated in current fiscal year	262	22
Originated one year before current year	524	443
Originated two years before current year	614	777
Originated three years before current year	510	666
Originated four years before current year	430	429
Originated more than five years before current fiscal year	241	192
Revolving	0	0
Revolving to Term	0	0
Total loans	2,581	2,529
Direct
Risk Category Of Loans [Line Items]
Originated in current fiscal year	34,071	32,521
Originated one year before current year	16,188	29,330
Originated two years before current year	14,526	30,681
Originated three years before current year	14,712	16,246
Originated four years before current year	7,467	8,774
Originated more than five years before current fiscal year	16,367	19,991
Revolving	36,854	26,032
Revolving to Term	200	1,232
Total loans	140,385	164,807
Direct | Segment Portfolio Reclassification, Adjusted Balance
Risk Category Of Loans [Line Items]
Total loans	140,385	164,807
Direct | Performing
Risk Category Of Loans [Line Items]
Originated in current fiscal year	34,058	32,499
Originated one year before current year	16,135	29,189
Originated two years before current year	14,396	30,510
Originated three years before current year	14,579	16,182
Originated four years before current year	7,432	8,527
Originated more than five years before current fiscal year	15,831	19,465
Revolving	36,812	26,028
Revolving to Term	192	1,229
Total loans	139,435	163,629
Direct | Nonperforming
Risk Category Of Loans [Line Items]
Originated in current fiscal year	13	22
Originated one year before current year	53	141
Originated two years before current year	130	171
Originated three years before current year	133	64
Originated four years before current year	35	247
Originated more than five years before current fiscal year	536	526
Revolving	42	4
Revolving to Term	8	3
Total loans	950	1,178
Home equity
Risk Category Of Loans [Line Items]
Originated in current fiscal year	0	1
Originated one year before current year	0	1,034
Originated two years before current year	649	444
Originated three years before current year	358	891
Originated four years before current year	576	249
Originated more than five years before current fiscal year	1	116
Revolving	539,315	529,369
Revolving to Term	19,691	24,310
Total loans	560,590	556,414
Home equity | Segment Portfolio Reclassification, Adjusted Balance
Risk Category Of Loans [Line Items]
Total loans	560,590	556,414
Home equity | Performing
Risk Category Of Loans [Line Items]
Originated in current fiscal year	0	1
Originated one year before current year	0	997
Originated two years before current year	633	444
Originated three years before current year	349	891
Originated four years before current year	535	238
Originated more than five years before current fiscal year	0	0
Revolving	539,057	529,275
Revolving to Term	16,768	20,314
Total loans	557,342	552,160
Home equity | Nonperforming
Risk Category Of Loans [Line Items]
Originated in current fiscal year	0	0
Originated one year before current year	0	37
Originated two years before current year	16	0
Originated three years before current year	9	0
Originated four years before current year	41	11
Originated more than five years before current fiscal year	1	116
Revolving	258	94
Revolving to Term	2,923	3,996
Total loans	3,248	4,254
Consumer
Risk Category Of Loans [Line Items]
Total loans	1,574,114	1,635,123
Pass | Commercial | Segment Portfolio Reclassification, Adjusted Balance
Risk Category Of Loans [Line Items]
Originated in current fiscal year	918,456	1,675,964
Originated one year before current year	563,869	420,736
Originated two years before current year	271,158	171,228
Originated three years before current year	98,468	227,710
Originated four years before current year	156,136	124,041
Originated more than five years before current fiscal year	235,639	262,538
Revolving	667,628	549,849
Revolving to Term	130,470	148,508
Total loans	3,041,824	3,580,574
Pass | Commercial real estate | Segment Portfolio Reclassification, Adjusted Balance
Risk Category Of Loans [Line Items]
Originated in current fiscal year	1,555,880	1,537,226
Originated one year before current year	1,474,271	1,041,305
Originated two years before current year	846,921	749,102
Originated three years before current year	481,508	677,119
Originated four years before current year	462,176	496,086
Originated more than five years before current fiscal year	611,680	513,658
Revolving	42,609	28,122
Revolving to Term	451,544	382,219
Total loans	5,926,589	5,424,837
Pass | BBCC | Segment Portfolio Reclassification, Adjusted Balance
Risk Category Of Loans [Line Items]
Originated in current fiscal year	81,710	94,828
Originated one year before current year	69,749	73,913
Originated two years before current year	54,580	49,875
Originated three years before current year	34,461	36,288
Originated four years before current year	25,113	24,946
Originated more than five years before current fiscal year	8,296	5,327
Revolving	47,571	52,393
Revolving to Term	18,778	19,353
Total loans	340,258	356,923
Criticized | Commercial | Segment Portfolio Reclassification, Adjusted Balance
Risk Category Of Loans [Line Items]
Originated in current fiscal year	9,998	23,982
Originated one year before current year	7,885	9,603
Originated two years before current year	6,660	15,003
Originated three years before current year	0	9,508
Originated four years before current year	7,809	3,383
Originated more than five years before current fiscal year	2,658	5,369
Revolving	14,601	10,307
Revolving to Term	10,076	2,685
Total loans	59,687	79,840
Criticized | Commercial real estate | Segment Portfolio Reclassification, Adjusted Balance
Risk Category Of Loans [Line Items]
Originated in current fiscal year	27,622	6,874
Originated one year before current year	24,790	49,271
Originated two years before current year	39,914	26,464
Originated three years before current year	0	46,994
Originated four years before current year	21,614	17,648
Originated more than five years before current fiscal year	22,157	33,490
Revolving	0	0
Revolving to Term	34,387	19,804
Total loans	170,484	200,545
Criticized | BBCC | Segment Portfolio Reclassification, Adjusted Balance
Risk Category Of Loans [Line Items]
Originated in current fiscal year	1,320	1,599
Originated one year before current year	1,170	1,403
Originated two years before current year	841	621
Originated three years before current year	160	414
Originated four years before current year	0	643
Originated more than five years before current fiscal year	0	0
Revolving	670	868
Revolving to Term	1,578	1,259
Total loans	5,739	6,807
Substandard | Commercial | Segment Portfolio Reclassification, Adjusted Balance
Risk Category Of Loans [Line Items]
Originated in current fiscal year	14,773	6,501
Originated one year before current year	14,468	6,369
Originated two years before current year	10,200	10,077
Originated three years before current year	9,849	9,836
Originated four years before current year	5,521	2,774
Originated more than five years before current fiscal year	945	8,441
Revolving	6,883	15,344
Revolving to Term	10,322	3,049
Total loans	72,961	62,391
Substandard | Commercial real estate | Segment Portfolio Reclassification, Adjusted Balance
Risk Category Of Loans [Line Items]
Originated in current fiscal year	4,706	11,451
Originated one year before current year	12,118	4,700
Originated two years before current year	9,933	13,565
Originated three years before current year	9,058	26,691
Originated four years before current year	18,165	5,308
Originated more than five years before current fiscal year	11,351	8,665
Revolving	2,291	0
Revolving to Term	4,339	2,911
Total loans	71,961	73,291
Substandard | BBCC | Segment Portfolio Reclassification, Adjusted Balance
Risk Category Of Loans [Line Items]
Originated in current fiscal year	284	233
Originated one year before current year	24	1,417
Originated two years before current year	79	195
Originated three years before current year	7	246
Originated four years before current year	187	33
Originated more than five years before current fiscal year	465	0
Revolving	103	317
Revolving to Term	239	701
Total loans	1,388	3,142
Nonaccrual | Commercial | Segment Portfolio Reclassification, Adjusted Balance
Risk Category Of Loans [Line Items]
Originated in current fiscal year	1,069	2,600
Originated one year before current year	3,507	3,754
Originated two years before current year	1,276	4,701
Originated three years before current year	3,721	6,951
Originated four years before current year	1,448	49
Originated more than five years before current fiscal year	0	4,379
Revolving	845	778
Revolving to Term	7,796	7,013
Total loans	19,662	30,225
Nonaccrual | Commercial real estate | Segment Portfolio Reclassification, Adjusted Balance
Risk Category Of Loans [Line Items]
Originated in current fiscal year	1,620	1,408
Originated one year before current year	2,997	2,054
Originated two years before current year	0	5,393
Originated three years before current year	1,627	9,456
Originated four years before current year	3,419	1,635
Originated more than five years before current fiscal year	8,905	12,564
Revolving	315	0
Revolving to Term	871	313
Total loans	19,754	32,823
Nonaccrual | BBCC | Segment Portfolio Reclassification, Adjusted Balance
Risk Category Of Loans [Line Items]
Originated in current fiscal year	0	161
Originated one year before current year	88	551
Originated two years before current year	0	134
Originated three years before current year	0	200
Originated four years before current year	66	0
Originated more than five years before current fiscal year	162	0
Revolving	0	89
Revolving to Term	1,136	1,466
Total loans	1,452	2,601
Doubtful | Commercial | Segment Portfolio Reclassification, Adjusted Balance
Risk Category Of Loans [Line Items]
Originated in current fiscal year	0	0
Originated one year before current year	178	0
Originated two years before current year	0	1,016
Originated three years before current year	288	2,748
Originated four years before current year	337	296
Originated more than five years before current fiscal year	5,275	610
Revolving	0	0
Revolving to Term	0	0
Total loans	6,078	4,670
Doubtful | Commercial real estate | Segment Portfolio Reclassification, Adjusted Balance
Risk Category Of Loans [Line Items]
Originated in current fiscal year	6,653	0
Originated one year before current year	0	1,832
Originated two years before current year	1,970	0
Originated three years before current year	342	18,926
Originated four years before current year	11,218	19,283
Originated more than five years before current fiscal year	12,513	3,274
Revolving	0	0
Revolving to Term	0	0
Total loans	32,696	43,315
Doubtful | BBCC | Segment Portfolio Reclassification, Adjusted Balance
Risk Category Of Loans [Line Items]
Originated in current fiscal year	0	0
Originated one year before current year	25	3
Originated two years before current year	284	847
Originated three years before current year	1,391	70
Originated four years before current year	0	0
Originated more than five years before current fiscal year	210	30
Revolving	0	0
Revolving to Term	0	0
Total loans	$ 1,910	$ 950

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