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Allowance for Loan and Lease Losses (Troubled Debt Restructuring) (Details)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2017
USD ($)
loans
Jun. 30, 2016
USD ($)
loans
Jun. 30, 2017
USD ($)
loans
Jun. 30, 2016
USD ($)
loans
Dec. 31, 2016
USD ($)
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Recorded Investment $ 150,891   $ 150,891   $ 150,916
Non-PCI Loans          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Number of Contracts | loans 126 110 275 221  
Financing Receivable, Modifications, Recorded Investment $ 130,696   $ 130,696   124,547
Financing Receivable, Modifications, Post-Modification Recorded Investment $ 7,466 $ 10,209 $ 17,721 $ 17,329  
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans 57 56 91 85  
Financing Receivable, Modifications, Subsequent Default, Recorded Investment $ 2,521 $ 3,113 $ 5,410 $ 4,773  
PCI Loans          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Number of Contracts | loans 3 1 5 5  
Financing Receivable, Modifications, Recorded Investment $ 20,195   $ 20,195   26,369
Financing Receivable, Modifications, Post-Modification Recorded Investment $ 384 $ 48 $ 507 $ 2,130  
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans 1 1 2 1  
Financing Receivable, Modifications, Subsequent Default, Recorded Investment $ 1,258 $ 54 $ 1,276 $ 54  
Commercial          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Recorded Investment 95,376   95,376   101,858
Commercial | Construction and land development          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Recorded Investment 3,585   3,585   3,600
Commercial | Mortgage          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Recorded Investment 79,000   79,000   84,698
Commercial | Other commercial real estate          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Recorded Investment 1,489   1,489   1,715
Commercial | Commercial and industrial          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Recorded Investment 8,855   8,855   10,629
Commercial | Lease financing          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Recorded Investment 1,785   1,785   1,074
Commercial | Other          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Recorded Investment 662   662   142
Noncommercial          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Recorded Investment 55,515   55,515   49,058
Noncommercial | Construction and land development          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Recorded Investment 237   237   240
Noncommercial | Mortgage          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Recorded Investment 44,035   44,035   39,129
Noncommercial | Revolving mortgage          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Recorded Investment 8,969   8,969   7,777
Noncommercial | Consumer and Other          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Recorded Investment 2,274   2,274   1,912
Accruing          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Recorded Investment 124,175   124,175   127,530
Accruing | Non-PCI Loans          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Recorded Investment 104,298   104,298   101,462
Accruing | PCI Loans          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Recorded Investment 19,877   19,877   26,068
Accruing | Commercial          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Recorded Investment 78,003   78,003   85,329
Accruing | Commercial | Construction and land development          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Recorded Investment 3,189   3,189   3,292
Accruing | Commercial | Mortgage          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Recorded Investment 64,031   64,031   70,263
Accruing | Commercial | Other commercial real estate          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Recorded Investment 862   862   1,635
Accruing | Commercial | Commercial and industrial          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Recorded Investment 8,234   8,234   9,193
Accruing | Commercial | Lease financing          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Recorded Investment 1,025   1,025   882
Accruing | Commercial | Other          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Recorded Investment 662   662   64
Accruing | Noncommercial          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Recorded Investment 46,172   46,172   42,201
Accruing | Noncommercial | Construction and land development          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Recorded Investment 237   237   240
Accruing | Noncommercial | Mortgage          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Recorded Investment 37,022   37,022   34,012
Accruing | Noncommercial | Revolving mortgage          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Recorded Investment 7,061   7,061   6,346
Accruing | Noncommercial | Consumer and Other          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Recorded Investment 1,852   1,852   1,603
Nonaccruing          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Recorded Investment 26,716   26,716   23,386
Nonaccruing | Non-PCI Loans          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Recorded Investment 26,398   26,398   23,085
Nonaccruing | PCI Loans          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Recorded Investment 318   318   301
Nonaccruing | Commercial          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Recorded Investment 17,373   17,373   16,529
Nonaccruing | Commercial | Construction and land development          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Recorded Investment 396   396   308
Nonaccruing | Commercial | Mortgage          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Recorded Investment 14,969   14,969   14,435
Nonaccruing | Commercial | Other commercial real estate          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Recorded Investment 627   627   80
Nonaccruing | Commercial | Commercial and industrial          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Recorded Investment 621   621   1,436
Nonaccruing | Commercial | Lease financing          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Recorded Investment 760   760   192
Nonaccruing | Commercial | Other          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Recorded Investment 0   0   78
Nonaccruing | Noncommercial          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Recorded Investment 9,343   9,343   6,857
Nonaccruing | Noncommercial | Construction and land development          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Recorded Investment 0   0   0
Nonaccruing | Noncommercial | Mortgage          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Recorded Investment 7,013   7,013   5,117
Nonaccruing | Noncommercial | Revolving mortgage          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Recorded Investment 1,908   1,908   1,431
Nonaccruing | Noncommercial | Consumer and Other          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Recorded Investment $ 422   $ 422   $ 309
Interest only period provided | Non-PCI Loans          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Number of Contracts | loans 3 0 3 1  
Financing Receivable, Modifications, Post-Modification Recorded Investment $ 571 $ 0 $ 571 $ 249  
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans 1 0 1 1  
Financing Receivable, Modifications, Subsequent Default, Recorded Investment $ 332 $ 0 $ 332 $ 249  
Interest only period provided | Commercial | Mortgage | Non-PCI Loans          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Number of Contracts | loans 2 0 2 1  
Financing Receivable, Modifications, Post-Modification Recorded Investment $ 406 $ 0 $ 406 $ 249  
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans 1 0 1 1  
Financing Receivable, Modifications, Subsequent Default, Recorded Investment $ 332 $ 0 $ 332 $ 249  
Interest only period provided | Noncommercial | Mortgage | Non-PCI Loans          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Number of Contracts | loans 1 0 1 0  
Financing Receivable, Modifications, Post-Modification Recorded Investment $ 165 $ 0 $ 165 $ 0  
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans 0 0 0 0  
Financing Receivable, Modifications, Subsequent Default, Recorded Investment $ 0 $ 0 $ 0 $ 0  
Loan term extension | Non-PCI Loans          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Number of Contracts | loans 13 8 21 13  
Financing Receivable, Modifications, Post-Modification Recorded Investment $ 1,397 $ 2,327 $ 2,070 $ 3,316  
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans 1 2 1 2  
Financing Receivable, Modifications, Subsequent Default, Recorded Investment $ 32 $ 52 $ 32 $ 52  
Loan term extension | Commercial | Construction and land development | Non-PCI Loans          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Number of Contracts | loans     0 1  
Financing Receivable, Modifications, Post-Modification Recorded Investment     $ 0 $ 401  
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans     0 0  
Financing Receivable, Modifications, Subsequent Default, Recorded Investment     $ 0 $ 0  
Loan term extension | Commercial | Mortgage | Non-PCI Loans          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Number of Contracts | loans 1 2 1 4  
Financing Receivable, Modifications, Post-Modification Recorded Investment $ 434 $ 808 $ 434 $ 1,096  
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans 0 0 0 0  
Financing Receivable, Modifications, Subsequent Default, Recorded Investment $ 0 $ 0 $ 0 $ 0  
Loan term extension | Commercial | Other commercial real estate | Non-PCI Loans          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Number of Contracts | loans 0 1 0 1  
Financing Receivable, Modifications, Post-Modification Recorded Investment $ 0 $ 841 $ 0 $ 841  
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans 0 0 0 0  
Financing Receivable, Modifications, Subsequent Default, Recorded Investment $ 0 $ 0 $ 0 $ 0  
Loan term extension | Commercial | Commercial and industrial | Non-PCI Loans          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Number of Contracts | loans 3 0 6 0  
Financing Receivable, Modifications, Post-Modification Recorded Investment $ 549 $ 0 $ 639 $ 0  
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans 0 1 0 1  
Financing Receivable, Modifications, Subsequent Default, Recorded Investment $ 0 $ 0 $ 0 $ 0  
Loan term extension | Commercial | Other | Non-PCI Loans          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Number of Contracts | loans     1 0  
Financing Receivable, Modifications, Post-Modification Recorded Investment     $ 523 $ 0  
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans     0 0  
Financing Receivable, Modifications, Subsequent Default, Recorded Investment     $ 0 $ 0  
Loan term extension | Noncommercial | Consumer | Non-PCI Loans          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Number of Contracts | loans 1 0 4 0  
Financing Receivable, Modifications, Post-Modification Recorded Investment $ 13 $ 0 $ 41 $ 0  
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans 0 0 0 0  
Financing Receivable, Modifications, Subsequent Default, Recorded Investment $ 0 $ 0 $ 0 $ 0  
Loan term extension | Noncommercial | Mortgage | Non-PCI Loans          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Number of Contracts | loans 8 5 9 7  
Financing Receivable, Modifications, Post-Modification Recorded Investment $ 401 $ 678 $ 433 $ 978  
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans 1 1 1 1  
Financing Receivable, Modifications, Subsequent Default, Recorded Investment $ 32 $ 52 $ 32 $ 52  
Below market interest rate | Non-PCI Loans          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Number of Contracts | loans 70 70 154 142  
Financing Receivable, Modifications, Post-Modification Recorded Investment $ 4,056 $ 5,798 $ 12,075 $ 10,726  
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans 31 35 47 52  
Financing Receivable, Modifications, Subsequent Default, Recorded Investment $ 1,542 $ 2,417 $ 2,955 $ 3,706  
Below market interest rate | PCI Loans          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Number of Contracts | loans 3 1 5 5  
Financing Receivable, Modifications, Post-Modification Recorded Investment $ 384 $ 48 $ 507 $ 2,130  
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans 1 1 2 1  
Financing Receivable, Modifications, Subsequent Default, Recorded Investment $ 1,258 $ 54 $ 1,276 $ 54  
Below market interest rate | Commercial | Construction and land development | Non-PCI Loans          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Number of Contracts | loans 0 4 1 6  
Financing Receivable, Modifications, Post-Modification Recorded Investment $ 0 $ 317 $ 0 $ 414  
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans 0 2 0 3  
Financing Receivable, Modifications, Subsequent Default, Recorded Investment $ 0 $ 209 $ 0 $ 227  
Below market interest rate | Commercial | Construction and land development | PCI Loans          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Number of Contracts | loans     0 1  
Financing Receivable, Modifications, Post-Modification Recorded Investment     $ 0 $ 55  
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans     0 0  
Financing Receivable, Modifications, Subsequent Default, Recorded Investment     $ 0 $ 0  
Below market interest rate | Commercial | Mortgage | Non-PCI Loans          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Number of Contracts | loans 8 12 21 22  
Financing Receivable, Modifications, Post-Modification Recorded Investment $ 1,448 $ 1,741 $ 4,734 $ 2,866  
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans 5 5 6 9  
Financing Receivable, Modifications, Subsequent Default, Recorded Investment $ 420 $ 577 $ 509 $ 1,078  
Below market interest rate | Commercial | Mortgage | PCI Loans          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Number of Contracts | loans 2 0 2 3  
Financing Receivable, Modifications, Post-Modification Recorded Investment $ 344 $ 0 $ 344 $ 2,027  
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans 1 0 1 0  
Financing Receivable, Modifications, Subsequent Default, Recorded Investment $ 1,258 $ 0 $ 1,258 $ 0  
Below market interest rate | Commercial | Other commercial real estate | Non-PCI Loans          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Number of Contracts | loans 0 1 1 1  
Financing Receivable, Modifications, Post-Modification Recorded Investment $ 0 $ 498 $ 2 $ 498  
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans 0 1 0 1  
Financing Receivable, Modifications, Subsequent Default, Recorded Investment $ 0 $ 12 $ 0 $ 12  
Below market interest rate | Commercial | Commercial and industrial | Non-PCI Loans          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Number of Contracts | loans 6 8 14 11  
Financing Receivable, Modifications, Post-Modification Recorded Investment $ 276 $ 694 $ 804 $ 704  
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans 2 5 2 5  
Financing Receivable, Modifications, Subsequent Default, Recorded Investment $ 88 $ 197 $ 88 $ 197  
Below market interest rate | Commercial | Lease financing | Non-PCI Loans          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Number of Contracts | loans     3 0  
Financing Receivable, Modifications, Post-Modification Recorded Investment     $ 760 $ 0  
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans     2 0  
Financing Receivable, Modifications, Subsequent Default, Recorded Investment     $ 701 $ 0  
Below market interest rate | Commercial | Other | Non-PCI Loans          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Number of Contracts | loans     1 1  
Financing Receivable, Modifications, Post-Modification Recorded Investment     $ 139 $ 85  
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans     1 1  
Financing Receivable, Modifications, Subsequent Default, Recorded Investment     $ 0 $ 85  
Below market interest rate | Noncommercial | Construction and land development | Non-PCI Loans          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Number of Contracts | loans 1 0 7 0  
Financing Receivable, Modifications, Post-Modification Recorded Investment $ 10 $ 0 $ 663 $ 0  
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans 0 0 0 0  
Financing Receivable, Modifications, Subsequent Default, Recorded Investment $ 0 $ 0 $ 0 $ 0  
Below market interest rate | Noncommercial | Consumer | Non-PCI Loans          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Number of Contracts | loans 6 1 10 3  
Financing Receivable, Modifications, Post-Modification Recorded Investment $ 50 $ 16 $ 73 $ 20  
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans 1 1 1 1  
Financing Receivable, Modifications, Subsequent Default, Recorded Investment $ 14 $ 0 $ 14 $ 0  
Below market interest rate | Noncommercial | Mortgage | Non-PCI Loans          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Number of Contracts | loans 48 42 95 94  
Financing Receivable, Modifications, Post-Modification Recorded Investment $ 2,266 $ 2,473 $ 4,894 $ 5,998  
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans 22 20 35 32  
Financing Receivable, Modifications, Subsequent Default, Recorded Investment $ 1,020 $ 1,337 $ 1,643 $ 2,107  
Below market interest rate | Noncommercial | Mortgage | PCI Loans          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Number of Contracts | loans 1 1 3 1  
Financing Receivable, Modifications, Post-Modification Recorded Investment $ 40 $ 48 $ 163 $ 48  
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans 0 1 1 1  
Financing Receivable, Modifications, Subsequent Default, Recorded Investment $ 0 $ 54 $ 18 $ 54  
Below market interest rate | Noncommercial | Other | Non-PCI Loans          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Number of Contracts | loans 0 0      
Financing Receivable, Modifications, Post-Modification Recorded Investment $ 0 $ 0      
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans 1 1      
Financing Receivable, Modifications, Subsequent Default, Recorded Investment $ 0 $ 85      
Below market interest rate | Noncommercial | Revolving mortgage | Non-PCI Loans          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Number of Contracts | loans 1 2 1 4  
Financing Receivable, Modifications, Post-Modification Recorded Investment $ 6 $ 59 $ 6 $ 141  
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans 0 0 0 0  
Financing Receivable, Modifications, Subsequent Default, Recorded Investment $ 0 $ 0 $ 0 $ 0  
Discharged from bankruptcy | Non-PCI Loans          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Number of Contracts | loans 40 32 97 65  
Financing Receivable, Modifications, Post-Modification Recorded Investment $ 1,442 $ 2,084 $ 3,005 $ 3,038  
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans 24 19 42 30  
Financing Receivable, Modifications, Subsequent Default, Recorded Investment $ 615 $ 644 $ 2,091 $ 766  
Discharged from bankruptcy | Commercial | Construction and land development | Non-PCI Loans          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Number of Contracts | loans 1 0 1 0  
Financing Receivable, Modifications, Post-Modification Recorded Investment $ 17 $ 0 $ 17 $ 0  
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans 1 0 1 1  
Financing Receivable, Modifications, Subsequent Default, Recorded Investment $ 17 $ 0 $ 17 $ 14  
Discharged from bankruptcy | Commercial | Mortgage | Non-PCI Loans          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Number of Contracts | loans 2 2 2 2  
Financing Receivable, Modifications, Post-Modification Recorded Investment $ 410 $ 283 $ 410 $ 283  
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans 0 0 0 0  
Financing Receivable, Modifications, Subsequent Default, Recorded Investment $ 0 $ 0 $ 0 $ 0  
Discharged from bankruptcy | Commercial | Commercial and industrial | Non-PCI Loans          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Number of Contracts | loans 1 2 1 2  
Financing Receivable, Modifications, Post-Modification Recorded Investment $ 0 $ 49 $ 0 $ 49  
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans 1 0 1 0  
Financing Receivable, Modifications, Subsequent Default, Recorded Investment $ 0 $ 0 $ 0 $ 0  
Discharged from bankruptcy | Commercial | Lease financing | Non-PCI Loans          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Number of Contracts | loans     16 0  
Financing Receivable, Modifications, Post-Modification Recorded Investment     $ 178 $ 0  
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans     0 0  
Financing Receivable, Modifications, Subsequent Default, Recorded Investment     $ 0 $ 0  
Discharged from bankruptcy | Noncommercial | Construction and land development | Non-PCI Loans          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Number of Contracts | loans 0 0 1 0  
Financing Receivable, Modifications, Post-Modification Recorded Investment $ 0 $ 0 $ 20 $ 0  
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans 1 0 1 0  
Financing Receivable, Modifications, Subsequent Default, Recorded Investment $ 20 $ 0 $ 20 $ 0  
Discharged from bankruptcy | Noncommercial | Consumer | Non-PCI Loans          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Number of Contracts | loans 16 10 40 25  
Financing Receivable, Modifications, Post-Modification Recorded Investment $ 222 $ 144 $ 510 $ 290  
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans 10 7 20 10  
Financing Receivable, Modifications, Subsequent Default, Recorded Investment $ 176 $ 79 $ 273 $ 95  
Discharged from bankruptcy | Noncommercial | Mortgage | Non-PCI Loans          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Number of Contracts | loans 8 5 16 11  
Financing Receivable, Modifications, Post-Modification Recorded Investment $ 223 $ 147 $ 777 $ 721  
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans 7 7 8 7  
Financing Receivable, Modifications, Subsequent Default, Recorded Investment $ 77 $ 506 $ 956 $ 506  
Discharged from bankruptcy | Noncommercial | Revolving mortgage | Non-PCI Loans          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Number of Contracts | loans 12 13 20 25  
Financing Receivable, Modifications, Post-Modification Recorded Investment $ 570 $ 1,461 $ 1,093 $ 1,695  
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans 4 5 11 12  
Financing Receivable, Modifications, Subsequent Default, Recorded Investment $ 325 $ 59 $ 825 $ 151