Loans and Leases Loans and Leases (Credit Rating) (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans and leases	$ 32,689,652	$ 32,791,975
Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
2021	3,948,788	8,459,531
2020	6,238,660	4,217,219
2019	3,857,049	2,787,346
2018	2,357,806	2,053,335
2017	1,731,057	1,647,878
Prior	3,112,959	2,238,335
Revolving	1,237,643	1,147,519
Revolving converted to term loans	6,945	6,897
Total loans and leases	22,490,907	22,558,060
Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2021	1,642,764	2,679,097
2020	2,413,528	1,444,947
2019	1,105,808	929,030
2018	666,859	728,918
2017	531,966	536,569
Prior	1,112,786	951,150
Revolving	2,189,647	2,339,505
Revolving converted to term loans	138,881	161,817
Total loans and leases	9,802,239	9,771,033
Consumer And PCD Portfolio Segments
Financing Receivable, Credit Quality Indicator [Line Items]
2021	5,591,552	11,172,270
2020	8,678,563	5,690,922
2019	4,988,425	3,749,427
2018	3,051,207	2,812,829
2017	2,289,129	2,215,777
Prior	4,486,331	3,458,369
Revolving	3,439,121	3,500,512
Revolving converted to term loans	165,324	191,869
Total loans and leases	32,689,652	32,791,975
Construction and land development | Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
2021	222,144	342,658
2020	441,661	341,862
2019	282,413	198,300
2018	167,085	56,118
2017	52,283	23,977
Prior	13,670	11,387
Revolving	4,673	11,122
Revolving converted to term loans	0	0
Total loans and leases	1,183,929	985,424
Construction and land development | Commercial | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2021	222,124	342,183
2020	441,299	341,233
2019	281,357	190,429
2018	165,495	50,776
2017	47,101	23,969
Prior	13,659	11,306
Revolving	4,395	10,969
Revolving converted to term loans	0	0
Total loans and leases	1,175,430	970,865
Construction and land development | Commercial | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
2021	20	246
2020	218	0
2019	0	6,421
2018	146	5,342
2017	72	0
Prior	0	0
Revolving	138	153
Revolving converted to term loans	0	0
Total loans and leases	594	12,162
Construction and land development | Commercial | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	229
2020	144	629
2019	1,056	1,450
2018	1,444	0
2017	5,110	8
Prior	11	81
Revolving	140	0
Revolving converted to term loans	0	0
Total loans and leases	7,905	2,397
Construction and land development | Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2021	101,107	215,112
2020	209,612	86,127
2019	38,621	24,981
2018	14,070	10,648
2017	7,064	6,093
Prior	4,085	2,637
Revolving	1,933	2,525
Revolving converted to term loans	0	0
Total loans and leases	376,492	348,123
Owner occupied commercial mortgage | Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
2021	1,430,719	3,200,021
2020	3,154,133	2,240,919
2019	2,139,092	1,671,722
2018	1,461,090	1,334,727
2017	1,139,639	1,081,293
Prior	2,085,149	1,521,016
Revolving	116,060	115,109
Revolving converted to term loans	188	205
Total loans and leases	11,526,070	11,165,012
Owner occupied commercial mortgage | Commercial | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2021	1,420,375	3,183,467
2020	3,123,179	2,201,165
2019	2,090,297	1,625,141
2018	1,417,269	1,301,412
2017	1,105,141	1,049,858
Prior	2,009,482	1,454,020
Revolving	104,492	101,556
Revolving converted to term loans	116	133
Total loans and leases	11,270,351	10,916,752
Owner occupied commercial mortgage | Commercial | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
2021	782	6,274
2020	25,052	20,702
2019	28,380	36,739
2018	33,575	12,387
2017	11,938	17,699
Prior	27,394	25,693
Revolving	3,030	5,115
Revolving converted to term loans	72	72
Total loans and leases	130,223	124,681
Owner occupied commercial mortgage | Commercial | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2021	9,562	10,280
2020	5,902	19,052
2019	20,415	9,842
2018	10,246	20,928
2017	22,560	13,736
Prior	48,273	41,303
Revolving	8,538	8,438
Revolving converted to term loans	0	0
Total loans and leases	125,496	123,579
Non-owner occupied commercial mortgage | Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
2021	314,202	868,982
2020	813,654	629,426
2019	609,725	401,226
2018	321,652	342,372
2017	310,512	302,018
Prior	611,697	410,223
Revolving	33,887	33,442
Revolving converted to term loans	0	0
Total loans and leases	3,015,329	2,987,689
Non-owner occupied commercial mortgage | Commercial | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2021	312,438	865,514
2020	801,110	609,975
2019	584,899	378,136
2018	300,019	331,800
2017	298,984	282,810
Prior	576,807	391,517
Revolving	32,061	32,149
Revolving converted to term loans	0	0
Total loans and leases	2,906,318	2,891,901
Non-owner occupied commercial mortgage | Commercial | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
2021	783	569
2020	647	905
2019	855	10,794
2018	10,678	1,808
2017	832	5,121
Prior	2,818	3,279
Revolving	500	483
Revolving converted to term loans	0	0
Total loans and leases	17,113	22,959
Non-owner occupied commercial mortgage | Commercial | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2021	981	2,899
2020	11,897	18,546
2019	23,971	12,296
2018	10,955	8,764
2017	10,696	14,087
Prior	32,072	15,427
Revolving	1,326	810
Revolving converted to term loans	0	0
Total loans and leases	91,898	72,829
Commercial and industrial | Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
2021	824,002	1,641,579
2020	1,288,517	1,005,012
2019	825,819	516,098
2018	407,979	320,118
2017	228,623	240,590
Prior	402,443	295,709
Revolving	1,083,023	987,846
Revolving converted to term loans	6,757	6,692
Total loans and leases	5,067,163	5,013,644
Commercial and industrial | Commercial | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2021	815,211	1,620,622
2020	1,272,974	983,852
2019	798,870	504,463
2018	397,616	310,468
2017	220,881	234,735
Prior	392,573	286,996
Revolving	988,180	899,978
Revolving converted to term loans	5,214	5,520
Total loans and leases	4,891,519	4,846,634
Commercial and industrial | Commercial | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
2021	2,003	3,146
2020	9,274	17,065
2019	22,326	7,265
2018	5,867	5,393
2017	4,587	3,307
Prior	5,746	4,912
Revolving	7,268	9,152
Revolving converted to term loans	192	189
Total loans and leases	57,263	50,429
Commercial and industrial | Commercial | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2021	6,788	17,811
2020	6,220	4,095
2019	4,606	4,370
2018	4,496	4,257
2017	3,155	2,548
Prior	4,124	3,801
Revolving	20,414	22,384
Revolving converted to term loans	1,351	983
Total loans and leases	51,154	60,249
Commercial and industrial | Commercial | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0
2020	49
2019	17
2018	0
2017	0
Prior	0
Revolving	1
Revolving converted to term loans	0
Total loans and leases	67
Commercial and industrial | Commercial | Ungraded
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	0
2020	0	0
2019	0	0
2018	0	0
2017	0	0
Prior	0	0
Revolving	67,160	56,332
Revolving converted to term loans	0	0
Total loans and leases	67,160	56,332
Residential mortgage | Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2021	1,147,835	1,885,273
2020	1,730,222	987,802
2019	783,095	671,657
2018	480,900	605,545
2017	446,421	476,855
Prior	1,042,241	909,361
Revolving	21,744	25,193
Revolving converted to term loans	0	0
Total loans and leases	5,652,458	5,561,686
Revolving mortgage | Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	0
2020	0	0
2019	0	0
2018	0	0
2017	0	0
Prior	0	0
Revolving	1,745,752	1,891,037
Revolving converted to term loans	138,881	161,817
Total loans and leases	1,884,633	2,052,854
Consumer auto | Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2021	315,317	524,393
2020	434,848	343,683
2019	264,842	221,383
2018	165,186	105,530
2017	72,974	50,627
Prior	34,374	9,786
Revolving	0	0
Revolving converted to term loans	0	0
Total loans and leases	1,287,541	1,255,402
Consumer other | Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2021	78,505	54,319
2020	38,846	27,335
2019	19,250	11,009
2018	6,703	7,195
2017	5,507	2,994
Prior	32,086	29,366
Revolving	420,218	420,750
Revolving converted to term loans	0	0
Total loans and leases	601,115	552,968
SBA-PPP | Commercial | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2021	1,157,721	2,406,291
2020	540,695	0
2019	0	0
2018	0	0
2017	0	0
Prior	0	0
Revolving	0	0
Revolving converted to term loans	0	0
Total loans and leases	1,698,416	2,406,291
PCD Loans
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	33,642
2020	26,375	28,756
2019	25,568	33,051
2018	26,542	30,576
2017	26,106	31,330
Prior	260,586	268,884
Revolving	11,831	13,488
Revolving converted to term loans	19,498	23,155
Total loans and leases	396,506	462,882
Current | Construction and land development | Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2021	100,826	215,112
2020	209,612	85,707
2019	38,606	24,860
2018	13,906	10,269
2017	7,060	6,093
Prior	3,669	2,218
Revolving	1,933	2,525
Revolving converted to term loans	0	0
Total loans and leases	375,612	346,784
Current | Residential mortgage | Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2021	1,146,230	1,882,683
2020	1,727,617	978,298
2019	779,136	655,798
2018	477,386	596,309
2017	440,502	461,719
Prior	1,014,974	878,634
Revolving	21,633	24,973
Revolving converted to term loans	0	0
Total loans and leases	5,607,478	5,478,414
Current | Revolving mortgage | Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	0
2020	0	0
2019	0	0
2018	0	0
2017	0	0
Prior	0	0
Revolving	1,736,398	1,879,968
Revolving converted to term loans	130,873	150,868
Total loans and leases	1,867,271	2,030,836
Current | Consumer auto | Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2021	314,523	521,719
2020	432,620	340,594
2019	262,684	219,597
2018	163,836	104,280
2017	72,275	49,872
Prior	34,050	9,604
Revolving	0	0
Revolving converted to term loans	0	0
Total loans and leases	1,279,988	1,245,666
Current | Consumer other | Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2021	78,465	53,842
2020	38,660	27,117
2019	19,115	10,911
2018	6,668	7,159
2017	5,481	2,980
Prior	31,966	29,336
Revolving	415,509	415,044
Revolving converted to term loans	0	0
Total loans and leases	595,864	546,389
Current | PCD Loans
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	31,475
2020	24,591	25,425
2019	22,834	27,183
2018	21,907	27,955
2017	23,877	28,995
Prior	227,641	232,186
Revolving	11,185	13,212
Revolving converted to term loans	17,968	21,027
Total loans and leases	350,003	407,458
30 to 59 Days past due | Construction and land development | Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2021	281	0
2020	0	420
2019	0	121
2018	114	370
2017	0	0
Prior	289	21
Revolving	0	0
Revolving converted to term loans	0	0
Total loans and leases	684	932
30 to 59 Days past due | Residential mortgage | Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2021	1,461	2,278
2020	1,343	4,573
2019	2,201	11,463
2018	1,707	3,772
2017	2,098	8,613
Prior	6,539	12,299
Revolving	38	220
Revolving converted to term loans	0	0
Total loans and leases	15,387	43,218
30 to 59 Days past due | Revolving mortgage | Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	0
2020	0	0
2019	0	0
2018	0	0
2017	0	0
Prior	0	0
Revolving	4,234	8,241
Revolving converted to term loans	3,043	3,736
Total loans and leases	7,277	11,977
30 to 59 Days past due | Consumer auto | Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2021	725	2,175
2020	1,516	1,873
2019	1,376	1,257
2018	925	842
2017	605	544
Prior	263	134
Revolving	0	0
Revolving converted to term loans	0	0
Total loans and leases	5,410	6,825
30 to 59 Days past due | Consumer other | Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2021	12	322
2020	127	114
2019	91	77
2018	25	18
2017	26	11
Prior	120	7
Revolving	2,688	3,061
Revolving converted to term loans	0	0
Total loans and leases	3,089	3,610
30 to 59 Days past due | PCD Loans
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	999
2020	632	925
2019	469	801
2018	663	718
2017	536	1,341
Prior	9,404	12,637
Revolving	513	156
Revolving converted to term loans	455	745
Total loans and leases	12,672	18,322
60 to 89 Days past due | Construction and land development | Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	0
2020	0	0
2019	15	0
2018	50	9
2017	4	0
Prior	0	68
Revolving	0	0
Revolving converted to term loans	0	0
Total loans and leases	69	77
60 to 89 Days past due | Residential mortgage | Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2021	144	30
2020	1,025	100
2019	64	1,246
2018	263	1,449
2017	451	834
Prior	3,585	4,705
Revolving	73	0
Revolving converted to term loans	0	0
Total loans and leases	5,605	8,364
60 to 89 Days past due | Revolving mortgage | Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	0
2020	0	0
2019	0	0
2018	0	0
2017	0	0
Prior	0	0
Revolving	875	527
Revolving converted to term loans	1,282	2,099
Total loans and leases	2,157	2,626
60 to 89 Days past due | Consumer auto | Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2021	69	329
2020	347	689
2019	367	312
2018	248	351
2017	16	109
Prior	51	45
Revolving	0	0
Revolving converted to term loans	0	0
Total loans and leases	1,098	1,835
60 to 89 Days past due | Consumer other | Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2021	18	102
2020	22	20
2019	25	13
2018	1	18
2017	0	3
Prior	0	23
Revolving	954	1,285
Revolving converted to term loans	0	0
Total loans and leases	1,020	1,464
60 to 89 Days past due | PCD Loans
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	447
2020	420	81
2019	66	312
2018	539	695
2017	56	97
Prior	3,553	4,098
Revolving	52	9
Revolving converted to term loans	32	337
Total loans and leases	4,718	6,076
90 Days or greater | Construction and land development | Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	0
2020	0	0
2019	0	0
2018	0	0
2017	0	0
Prior	127	330
Revolving	0	0
Revolving converted to term loans	0	0
Total loans and leases	127	330
90 Days or greater | Residential mortgage | Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	282
2020	237	4,831
2019	1,694	3,150
2018	1,544	4,015
2017	3,370	5,689
Prior	17,143	13,723
Revolving	0	0
Revolving converted to term loans	0	0
Total loans and leases	23,988	31,690
90 Days or greater | Revolving mortgage | Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	0
2020	0	0
2019	0	0
2018	0	0
2017	0	0
Prior	0	0
Revolving	4,245	2,301
Revolving converted to term loans	3,683	5,114
Total loans and leases	7,928	7,415
90 Days or greater | Consumer auto | Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	170
2020	365	527
2019	415	217
2018	177	57
2017	78	102
Prior	10	3
Revolving	0	0
Revolving converted to term loans	0	0
Total loans and leases	1,045	1,076
90 Days or greater | Consumer other | Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2021	10	53
2020	37	84
2019	19	8
2018	9	0
2017	0	0
Prior	0	0
Revolving	1,067	1,360
Revolving converted to term loans	0	0
Total loans and leases	1,142	1,505
90 Days or greater | PCD Loans
Financing Receivable, Credit Quality Indicator [Line Items]
2021	0	721
2020	732	2,325
2019	2,199	4,755
2018	3,433	1,208
2017	1,637	897
Prior	19,988	19,963
Revolving	81	111
Revolving converted to term loans	1,043	1,046
Total loans and leases	$ 29,113	$ 31,026