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Loans And Allowance For Loan Losses - Loan Portfolio Credit Exposure (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Financing Receivable, Credit Quality Indicator [Line Items]    
2021 $ 9,422,021 $ 8,709,446
2020 6,553,714 6,259,069
2019 4,897,449 4,981,643
2018 3,086,000 3,875,295
2017 2,559,500 2,594,349
Prior 4,731,830 4,699,763
Total $ 39,311,958 $ 38,252,984
Maximum    
Financing Receivable, Credit Quality Indicator [Line Items]    
Allowance for loan and lease losses, percent of loan amount 50.00% 50.00%
Revolving Loans Amortized Cost Basis    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total $ 7,945,964 $ 6,985,664
Revolving Loans Converted to Term Loans    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 115,480 147,755
Commercial and industrial    
Financing Receivable, Credit Quality Indicator [Line Items]    
2021 4,201,081 5,241,473
2020 2,696,735 2,722,640
2019 2,112,628 2,098,769
2018 1,549,445 1,662,981
2017 1,184,980 1,130,716
Prior 2,156,245 2,015,220
Total 19,561,161 19,520,168
Commercial and industrial | Revolving Loans Amortized Cost Basis    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 5,617,205 4,597,604
Commercial and industrial | Revolving Loans Converted to Term Loans    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 42,842 50,765
Commercial and industrial | Commercial, financial, and agricultural    
Financing Receivable, Credit Quality Indicator [Line Items]    
2021 2,416,710 3,911,053
2020 1,398,694 1,414,417
2019 981,693 904,651
2018 637,246 640,754
2017 451,760 565,886
Prior 944,049 674,588
Total 12,052,475 12,410,152
Commercial and industrial | Commercial, financial, and agricultural | Revolving Loans Amortized Cost Basis    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 5,179,481 4,248,038
Commercial and industrial | Commercial, financial, and agricultural | Revolving Loans Converted to Term Loans    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 42,842 50,765
Commercial and industrial | Owner-occupied    
Financing Receivable, Credit Quality Indicator [Line Items]    
2021 1,784,371 1,330,420
2020 1,298,041 1,308,223
2019 1,130,935 1,194,118
2018 912,199 1,022,227
2017 733,220 564,830
Prior 1,212,196 1,340,632
Total 7,508,686 7,110,016
Commercial and industrial | Owner-occupied | Revolving Loans Amortized Cost Basis    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 437,724 349,566
Commercial and industrial | Owner-occupied | Revolving Loans Converted to Term Loans    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 0 0
Commercial real estate    
Financing Receivable, Credit Quality Indicator [Line Items]    
2021 3,271,317 1,344,249
2020 1,591,162 2,469,117
2019 2,079,334 2,366,966
2018 1,256,576 1,431,516
2017 888,314 696,471
Prior 1,460,714 1,649,986
Total 10,981,490 10,325,707
Commercial real estate | Revolving Loans Amortized Cost Basis    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 434,073 367,402
Commercial real estate | Revolving Loans Converted to Term Loans    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 0 0
Commercial real estate | Investment properties    
Financing Receivable, Credit Quality Indicator [Line Items]    
2021 2,831,606 1,057,929
2020 1,463,829 2,197,597
2019 1,946,374 2,200,615
2018 1,140,792 1,247,704
2017 800,794 644,017
Prior 1,352,050 1,470,998
Total 9,869,155 9,103,379
Commercial real estate | Investment properties | Revolving Loans Amortized Cost Basis    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 333,710 284,519
Commercial real estate | Investment properties | Revolving Loans Converted to Term Loans    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 0 0
Commercial real estate | 1-4 family properties    
Financing Receivable, Credit Quality Indicator [Line Items]    
2021 297,273 199,249
2020 83,183 95,798
2019 53,146 75,087
2018 47,247 89,704
2017 49,546 40,069
Prior 59,441 99,791
Total 645,469 628,695
Commercial real estate | 1-4 family properties | Revolving Loans Amortized Cost Basis    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 55,633 28,997
Commercial real estate | 1-4 family properties | Revolving Loans Converted to Term Loans    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 0 0
Commercial real estate | Land and development    
Financing Receivable, Credit Quality Indicator [Line Items]    
2021 142,438 87,071
2020 44,150 175,722
2019 79,814 91,264
2018 68,537 94,108
2017 37,974 12,385
Prior 49,223 79,197
Total 466,866 593,633
Commercial real estate | Land and development | Revolving Loans Amortized Cost Basis    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 44,730 53,886
Commercial real estate | Land and development | Revolving Loans Converted to Term Loans    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 0 0
Consumer    
Financing Receivable, Credit Quality Indicator [Line Items]    
2021 1,949,623 2,123,724
2020 2,265,817 1,067,312
2019 705,487 515,908
2018 279,979 780,798
2017 486,206 767,162
Prior 1,114,871 1,034,557
Total 8,769,307 8,407,109
Consumer | Revolving Loans Amortized Cost Basis    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 1,894,686 2,020,658
Consumer | Revolving Loans Converted to Term Loans    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 72,638 96,990
Consumer | Consumer mortgages    
Financing Receivable, Credit Quality Indicator [Line Items]    
2021 1,294,137 1,871,545
2020 1,555,190 875,730
2019 576,292 426,459
2018 228,664 679,144
2017 398,139 686,676
Prior 1,016,321 972,897
Total 5,069,039 5,513,491
Consumer | Consumer mortgages | Revolving Loans Amortized Cost Basis    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 296 1,040
Consumer | Consumer mortgages | Revolving Loans Converted to Term Loans    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 0 0
Consumer | Home equity lines    
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
Total 1,281,989 1,537,726
Consumer | Home equity lines | Revolving Loans Amortized Cost Basis    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 1,209,351 1,440,736
Consumer | Home equity lines | Revolving Loans Converted to Term Loans    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 72,638 96,990
Consumer | Credit cards    
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
Total 299,556 281,018
Consumer | Credit cards | Revolving Loans Amortized Cost Basis    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 299,556 281,018
Consumer | Credit cards | Revolving Loans Converted to Term Loans    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 0 0
Consumer | Other consumer loans    
Financing Receivable, Credit Quality Indicator [Line Items]    
2021 655,486 252,179
2020 710,627 191,582
2019 129,195 89,449
2018 51,315 101,654
2017 88,067 80,486
Prior 98,550 61,660
Total 2,118,723 1,074,874
Consumer | Other consumer loans | Revolving Loans Amortized Cost Basis    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 385,483 297,864
Consumer | Other consumer loans | Revolving Loans Converted to Term Loans    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 0 0
Pass | Commercial and industrial | Commercial, financial, and agricultural    
Financing Receivable, Credit Quality Indicator [Line Items]    
2021 2,397,405 3,819,048
2020 1,332,549 1,333,460
2019 922,396 847,283
2018 607,918 582,612
2017 433,045 551,413
Prior 903,995 633,871
Total 11,696,285 11,920,200
Pass | Commercial and industrial | Commercial, financial, and agricultural | Revolving Loans Amortized Cost Basis    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 5,056,168 4,102,751
Pass | Commercial and industrial | Commercial, financial, and agricultural | Revolving Loans Converted to Term Loans    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 42,809 49,762
Pass | Commercial and industrial | Owner-occupied    
Financing Receivable, Credit Quality Indicator [Line Items]    
2021 1,776,086 1,321,680
2020 1,276,797 1,275,435
2019 1,117,825 1,131,183
2018 858,721 982,056
2017 708,942 555,932
Prior 1,150,386 1,297,070
Total 7,326,481 6,912,922
Pass | Commercial and industrial | Owner-occupied | Revolving Loans Amortized Cost Basis    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 437,724 349,566
Pass | Commercial and industrial | Owner-occupied | Revolving Loans Converted to Term Loans    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 0 0
Pass | Commercial real estate | Investment properties    
Financing Receivable, Credit Quality Indicator [Line Items]    
2021 2,823,978 1,055,440
2020 1,463,503 2,126,667
2019 1,905,534 1,999,345
2018 1,019,765 1,091,880
2017 738,036 483,780
Prior 1,284,013 1,301,088
Total 9,513,526 8,287,244
Pass | Commercial real estate | Investment properties | Revolving Loans Amortized Cost Basis    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 278,697 229,044
Pass | Commercial real estate | Investment properties | Revolving Loans Converted to Term Loans    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 0 0
Pass | Commercial real estate | 1-4 family properties    
Financing Receivable, Credit Quality Indicator [Line Items]    
2021 295,082 197,320
2020 82,976 95,145
2019 51,939 70,267
2018 43,025 88,454
2017 49,057 38,729
Prior 57,025 97,374
Total 634,692 614,946
Pass | Commercial real estate | 1-4 family properties | Revolving Loans Amortized Cost Basis    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 55,588 27,657
Pass | Commercial real estate | 1-4 family properties | Revolving Loans Converted to Term Loans    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 0 0
Pass | Commercial real estate | Land and development    
Financing Receivable, Credit Quality Indicator [Line Items]    
2021 141,614 84,985
2020 42,201 173,302
2019 77,868 83,734
2018 34,058 92,911
2017 37,167 12,249
Prior 44,989 76,380
Total 422,627 576,811
Pass | Commercial real estate | Land and development | Revolving Loans Amortized Cost Basis    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 44,730 53,250
Pass | Commercial real estate | Land and development | Revolving Loans Converted to Term Loans    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 0 0
Pass | Consumer | Consumer mortgages    
Financing Receivable, Credit Quality Indicator [Line Items]    
2021 1,293,106 1,871,512
2020 1,551,510 874,769
2019 570,344 425,711
2018 216,277 678,255
2017 392,422 685,810
Prior 991,080 965,382
Total 5,015,035 5,502,479
Pass | Consumer | Consumer mortgages | Revolving Loans Amortized Cost Basis    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 296 1,040
Pass | Consumer | Consumer mortgages | Revolving Loans Converted to Term Loans    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 0 0
Pass | Consumer | Home equity lines    
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
Total 1,266,774 1,520,587
Pass | Consumer | Home equity lines | Revolving Loans Amortized Cost Basis    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 1,199,635 1,429,755
Pass | Consumer | Home equity lines | Revolving Loans Converted to Term Loans    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 67,139 90,832
Pass | Consumer | Credit cards    
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
Total 298,287 279,142
Pass | Consumer | Credit cards | Revolving Loans Amortized Cost Basis    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 298,287 279,142
Pass | Consumer | Credit cards | Revolving Loans Converted to Term Loans    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 0 0
Pass | Consumer | Other consumer loans    
Financing Receivable, Credit Quality Indicator [Line Items]    
2021 654,818 252,160
2020 709,077 190,820
2019 127,131 89,187
2018 50,007 100,459
2017 86,175 80,365
Prior 97,780 61,040
Total 2,110,296 1,071,668
Pass | Consumer | Other consumer loans | Revolving Loans Amortized Cost Basis    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 385,308 297,637
Pass | Consumer | Other consumer loans | Revolving Loans Converted to Term Loans    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 0 0
Special Mention | Commercial and industrial | Commercial, financial, and agricultural    
Financing Receivable, Credit Quality Indicator [Line Items]    
2021 2,731 63,307
2020 15,166 40,618
2019 17,571 12,723
2018 10,433 22,070
2017 2,242 1,665
Prior 2,489 5,545
Total 122,628 207,158
Special Mention | Commercial and industrial | Commercial, financial, and agricultural | Revolving Loans Amortized Cost Basis    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 71,996 60,741
Special Mention | Commercial and industrial | Commercial, financial, and agricultural | Revolving Loans Converted to Term Loans    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 0 489
Special Mention | Commercial and industrial | Owner-occupied    
Financing Receivable, Credit Quality Indicator [Line Items]    
2021 702 6,170
2020 19,950 9,995
2019 4,724 10,682
2018 10,202 14,138
2017 18,109 1,582
Prior 36,481 13,768
Total 90,168 56,335
Special Mention | Commercial and industrial | Owner-occupied | Revolving Loans Amortized Cost Basis    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 0 0
Special Mention | Commercial and industrial | Owner-occupied | Revolving Loans Converted to Term Loans    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 0 0
Special Mention | Commercial real estate | Investment properties    
Financing Receivable, Credit Quality Indicator [Line Items]    
2021 6,163 1,482
2020 0 66,160
2019 32,290 176,794
2018 63,900 136,004
2017 59,194 138,362
Prior 44,532 129,401
Total 239,738 703,643
Special Mention | Commercial real estate | Investment properties | Revolving Loans Amortized Cost Basis    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 33,659 55,440
Special Mention | Commercial real estate | Investment properties | Revolving Loans Converted to Term Loans    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 0 0
Special Mention | Commercial real estate | 1-4 family properties    
Financing Receivable, Credit Quality Indicator [Line Items]    
2021 192 402
2020 207 0
2019 641 508
2018 0 109
2017 0 786
Prior 239 118
Total 1,279 1,923
Special Mention | Commercial real estate | 1-4 family properties | Revolving Loans Amortized Cost Basis    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 0 0
Special Mention | Commercial real estate | 1-4 family properties | Revolving Loans Converted to Term Loans    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 0 0
Special Mention | Commercial real estate | Land and development    
Financing Receivable, Credit Quality Indicator [Line Items]    
2021 0 857
2020 800 1,995
2019 1,900 2,866
2018 31,458 282
2017 0 0
Prior 1,179 1,332
Total 35,337 7,968
Special Mention | Commercial real estate | Land and development | Revolving Loans Amortized Cost Basis    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 0 636
Special Mention | Commercial real estate | Land and development | Revolving Loans Converted to Term Loans    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 0 0
Substandard | Commercial and industrial | Commercial, financial, and agricultural    
Financing Receivable, Credit Quality Indicator [Line Items]    
2021 16,105 28,698
2020 50,979 36,618
2019 40,125 24,867
2018 10,383 36,072
2017 16,473 12,808
Prior 37,565 35,172
Total 222,932 259,247
Substandard | Commercial and industrial | Commercial, financial, and agricultural | Revolving Loans Amortized Cost Basis    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 51,269 84,498
Substandard | Commercial and industrial | Commercial, financial, and agricultural | Revolving Loans Converted to Term Loans    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 33 514
Substandard | Commercial and industrial | Owner-occupied    
Financing Receivable, Credit Quality Indicator [Line Items]    
2021 7,312 2,570
2020 1,294 22,793
2019 8,386 42,615
2018 43,276 26,033
2017 6,169 7,316
Prior 25,329 29,794
Total 91,766 131,121
Substandard | Commercial and industrial | Owner-occupied | Revolving Loans Amortized Cost Basis    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 0 0
Substandard | Commercial and industrial | Owner-occupied | Revolving Loans Converted to Term Loans    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 0 0
Substandard | Commercial real estate | Investment properties    
Financing Receivable, Credit Quality Indicator [Line Items]    
2021 1,465 1,007
2020 326 4,770
2019 8,550 24,476
2018 57,127 19,820
2017 3,564 21,875
Prior 23,505 40,509
Total 115,891 112,492
Substandard | Commercial real estate | Investment properties | Revolving Loans Amortized Cost Basis    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 21,354 35
Substandard | Commercial real estate | Investment properties | Revolving Loans Converted to Term Loans    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 0 0
Substandard | Commercial real estate | 1-4 family properties    
Financing Receivable, Credit Quality Indicator [Line Items]    
2021 1,999 1,527
2020 0 653
2019 566 4,312
2018 4,222 1,141
2017 489 554
Prior 2,177 2,299
Total 9,498 11,826
Substandard | Commercial real estate | 1-4 family properties | Revolving Loans Amortized Cost Basis    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 45 1,340
Substandard | Commercial real estate | 1-4 family properties | Revolving Loans Converted to Term Loans    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 0 0
Substandard | Commercial real estate | Land and development    
Financing Receivable, Credit Quality Indicator [Line Items]    
2021 824 1,229
2020 1,149 425
2019 46 4,664
2018 3,021 915
2017 807 136
Prior 3,055 1,485
Total 8,902 8,854
Substandard | Commercial real estate | Land and development | Revolving Loans Amortized Cost Basis    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 0 0
Substandard | Commercial real estate | Land and development | Revolving Loans Converted to Term Loans    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 0 0
Substandard | Consumer | Consumer mortgages    
Financing Receivable, Credit Quality Indicator [Line Items]    
2021 1,031 33
2020 3,680 961
2019 5,943 748
2018 12,387 889
2017 5,717 866
Prior 25,025 7,224
Total 53,783 10,721
Substandard | Consumer | Consumer mortgages | Revolving Loans Amortized Cost Basis    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 0 0
Substandard | Consumer | Consumer mortgages | Revolving Loans Converted to Term Loans    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 0 0
Substandard | Consumer | Home equity lines    
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
Total 14,417 15,694
Substandard | Consumer | Home equity lines | Revolving Loans Amortized Cost Basis    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 9,058 9,698
Substandard | Consumer | Home equity lines | Revolving Loans Converted to Term Loans    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 5,359 5,996
Substandard | Consumer | Credit cards    
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
Total 521 595
Substandard | Consumer | Credit cards | Revolving Loans Amortized Cost Basis    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 521 595
Substandard | Consumer | Credit cards | Revolving Loans Converted to Term Loans    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 0 0
Substandard | Consumer | Other consumer loans    
Financing Receivable, Credit Quality Indicator [Line Items]    
2021 668 19
2020 1,550 762
2019 2,064 262
2018 1,308 1,195
2017 1,892 121
Prior 750 585
Total 8,407 3,171
Substandard | Consumer | Other consumer loans | Revolving Loans Amortized Cost Basis    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 175 227
Substandard | Consumer | Other consumer loans | Revolving Loans Converted to Term Loans    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 0 0
Doubtful | Commercial and industrial | Commercial, financial, and agricultural    
Financing Receivable, Credit Quality Indicator [Line Items]    
2021 469 0
2020 0 3,721
2019 1,601 19,778
2018 8,512 0
2017 0 0
Prior 0 0
Total 10,630 23,547
Doubtful | Commercial and industrial | Commercial, financial, and agricultural | Revolving Loans Amortized Cost Basis    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 48 48
Doubtful | Commercial and industrial | Commercial, financial, and agricultural | Revolving Loans Converted to Term Loans    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 0 0
Doubtful | Commercial and industrial | Owner-occupied    
Financing Receivable, Credit Quality Indicator [Line Items]    
2021 0 0
2020 0 0
2019 0 9,638
2018 0 0
2017 0 0
Prior 0 0
Total 0 9,638
Doubtful | Commercial and industrial | Owner-occupied | Revolving Loans Amortized Cost Basis    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 0 0
Doubtful | Commercial and industrial | Owner-occupied | Revolving Loans Converted to Term Loans    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 0 0
Doubtful | Consumer | Home equity lines    
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
Total 0 19
Doubtful | Consumer | Home equity lines | Revolving Loans Amortized Cost Basis    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 0 0
Doubtful | Consumer | Home equity lines | Revolving Loans Converted to Term Loans    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 0 19
Loss | Commercial and industrial | Owner-occupied    
Financing Receivable, Credit Quality Indicator [Line Items]    
2021 271  
2020 0  
2019 0  
2018 0  
2017 0  
Prior 0  
Total 271  
Loss | Commercial and industrial | Owner-occupied | Revolving Loans Amortized Cost Basis    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 0  
Loss | Commercial and industrial | Owner-occupied | Revolving Loans Converted to Term Loans    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 0  
Loss | Consumer | Consumer mortgages    
Financing Receivable, Credit Quality Indicator [Line Items]    
2021 0 0
2020 0 0
2019 5 0
2018 0 0
2017 0 0
Prior 216 291
Total 221 291
Loss | Consumer | Consumer mortgages | Revolving Loans Amortized Cost Basis    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 0 0
Loss | Consumer | Consumer mortgages | Revolving Loans Converted to Term Loans    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 0 0
Loss | Consumer | Home equity lines    
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
Total 798 1,426
Loss | Consumer | Home equity lines | Revolving Loans Amortized Cost Basis    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 658 1,283
Loss | Consumer | Home equity lines | Revolving Loans Converted to Term Loans    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 140 143
Loss | Consumer | Credit cards    
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
Total 748 1,281
Loss | Consumer | Credit cards | Revolving Loans Amortized Cost Basis    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 748 1,281
Loss | Consumer | Credit cards | Revolving Loans Converted to Term Loans    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 0 0
Loss | Consumer | Other consumer loans    
Financing Receivable, Credit Quality Indicator [Line Items]    
2021 0 0
2020 0 0
2019 0 0
2018 0 0
2017 0 0
Prior 20 35
Total 20 35
Loss | Consumer | Other consumer loans | Revolving Loans Amortized Cost Basis    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 0 0
Loss | Consumer | Other consumer loans | Revolving Loans Converted to Term Loans    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total $ 0 $ 0