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Allowance for Loan and Lease Losses (Troubled Debt Restructuring) (Details)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2017
USD ($)
loans
Sep. 30, 2016
USD ($)
loans
Sep. 30, 2017
USD ($)
loans
Sep. 30, 2016
USD ($)
loans
Dec. 31, 2016
USD ($)
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Recorded Investment $ 154,382   $ 154,382   $ 150,916
Non-PCI Loans          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Number of Contracts | loans 110 105 414 361  
Financing Receivable, Modifications, Recorded Investment $ 134,363   $ 134,363   124,547
Financing Receivable, Modifications, Post-Modification Recorded Investment $ 12,490 $ 10,584 $ 31,477 $ 32,321  
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans 65 42 153 115  
Financing Receivable, Modifications, Subsequent Default, Recorded Investment $ 3,848 $ 1,978 $ 10,070 $ 7,738  
PCI Loans          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Number of Contracts | loans 5 3 12 8  
Financing Receivable, Modifications, Recorded Investment $ 20,019   $ 20,019   26,369
Financing Receivable, Modifications, Post-Modification Recorded Investment $ 690 $ 3,125 $ 1,697 $ 5,252  
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans 2 1 2 1  
Financing Receivable, Modifications, Subsequent Default, Recorded Investment $ 423 $ 79 $ 423 $ 79  
Commercial          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Recorded Investment 94,767   94,767   101,858
Commercial | Construction and land development          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Recorded Investment 3,158   3,158   3,600
Commercial | Mortgage          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Recorded Investment 79,083   79,083   84,698
Commercial | Other commercial real estate          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Recorded Investment 1,536   1,536   1,715
Commercial | Commercial and industrial          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Recorded Investment 8,780   8,780   10,629
Commercial | Lease financing          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Recorded Investment 1,688   1,688   1,074
Commercial | Other          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Recorded Investment 522   522   142
Noncommercial          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Recorded Investment 59,615   59,615   49,058
Noncommercial | Construction and land development          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Recorded Investment 234   234   240
Noncommercial | Mortgage          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Recorded Investment 38,684   38,684   39,129
Noncommercial | Revolving mortgage          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Recorded Investment 18,471   18,471   7,777
Noncommercial | Consumer and Other          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Recorded Investment 2,226   2,226   1,912
Accruing          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Recorded Investment 123,664   123,664   127,530
Accruing | Non-PCI Loans          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Recorded Investment 103,945   103,945   101,462
Accruing | PCI Loans          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Recorded Investment 19,719   19,719   26,068
Accruing | Commercial          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Recorded Investment 75,005   75,005   85,329
Accruing | Commercial | Construction and land development          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Recorded Investment 2,824   2,824   3,292
Accruing | Commercial | Mortgage          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Recorded Investment 63,027   63,027   70,263
Accruing | Commercial | Other commercial real estate          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Recorded Investment 702   702   1,635
Accruing | Commercial | Commercial and industrial          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Recorded Investment 7,155   7,155   9,193
Accruing | Commercial | Lease financing          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Recorded Investment 775   775   882
Accruing | Commercial | Other          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Recorded Investment 522   522   64
Accruing | Noncommercial          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Recorded Investment 48,659   48,659   42,201
Accruing | Noncommercial | Construction and land development          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Recorded Investment 234   234   240
Accruing | Noncommercial | Mortgage          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Recorded Investment 31,398   31,398   34,012
Accruing | Noncommercial | Revolving mortgage          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Recorded Investment 15,124   15,124   6,346
Accruing | Noncommercial | Consumer and Other          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Recorded Investment 1,903   1,903   1,603
Nonaccruing          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Recorded Investment 30,718   30,718   23,386
Nonaccruing | Non-PCI Loans          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Recorded Investment 30,418   30,418   23,085
Nonaccruing | PCI Loans          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Recorded Investment 300   300   301
Nonaccruing | Commercial          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Recorded Investment 19,762   19,762   16,529
Nonaccruing | Commercial | Construction and land development          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Recorded Investment 334   334   308
Nonaccruing | Commercial | Mortgage          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Recorded Investment 16,056   16,056   14,435
Nonaccruing | Commercial | Other commercial real estate          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Recorded Investment 834   834   80
Nonaccruing | Commercial | Commercial and industrial          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Recorded Investment 1,625   1,625   1,436
Nonaccruing | Commercial | Lease financing          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Recorded Investment 913   913   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 10,956   10,956   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 7,286   7,286   5,117
Nonaccruing | Noncommercial | Revolving mortgage          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Recorded Investment 3,347   3,347   1,431
Nonaccruing | Noncommercial | Consumer and Other          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Recorded Investment $ 323   $ 323   $ 309
Interest only period provided | Non-PCI Loans          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Number of Contracts | loans 3 1 6 2  
Financing Receivable, Modifications, Post-Modification Recorded Investment $ 696 $ 124 $ 1,180 $ 369  
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans 0 1 1 2  
Financing Receivable, Modifications, Subsequent Default, Recorded Investment $ 0 $ 124 $ 328 $ 369  
Interest only period provided | Commercial | Mortgage | Non-PCI Loans          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Number of Contracts | loans 3 0 5 1  
Financing Receivable, Modifications, Post-Modification Recorded Investment $ 696 $ 0 $ 1,097 $ 245  
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans 0 0 1 1  
Financing Receivable, Modifications, Subsequent Default, Recorded Investment $ 0 $ 0 $ 328 $ 245  
Interest only period provided | Noncommercial | Mortgage | 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 $ 124 $ 0 $ 124  
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans 0 1 0 1  
Financing Receivable, Modifications, Subsequent Default, Recorded Investment $ 0 $ 124 $ 0 $ 124  
Interest only period provided | Noncommercial | Revolving mortgage | Non-PCI Loans          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Number of Contracts | loans     1 0  
Financing Receivable, Modifications, Post-Modification Recorded Investment     $ 83 $ 0  
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans     0 0  
Financing Receivable, Modifications, Subsequent Default, Recorded Investment     $ 0 $ 0  
Loan term extension | Non-PCI Loans          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Number of Contracts | loans 6 9 31 23  
Financing Receivable, Modifications, Post-Modification Recorded Investment $ 156 $ 1,924 $ 2,787 $ 5,144  
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans 0 0 1 1  
Financing Receivable, Modifications, Subsequent Default, Recorded Investment $ 0 $ 0 $ 31 $ 0  
Loan term extension | Commercial | Construction and land development | Non-PCI Loans          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Number of Contracts | loans     0 2  
Financing Receivable, Modifications, Post-Modification Recorded Investment     $ 0 $ 424  
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 0 3 1 7  
Financing Receivable, Modifications, Post-Modification Recorded Investment $ 0 $ 1,321 $ 425 $ 2,407  
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  
Financing Receivable, Modifications, Post-Modification Recorded Investment     $ 0 $ 743  
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans     0 0  
Financing Receivable, Modifications, Subsequent Default, Recorded Investment     $ 0 $ 0  
Loan term extension | Commercial | Commercial and industrial | Non-PCI Loans          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Number of Contracts | loans 1 1 7 1  
Financing Receivable, Modifications, Post-Modification Recorded Investment $ 10 $ 22 $ 411 $ 22  
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans 0 0 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     $ 522 $ 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 2 1 6 1  
Financing Receivable, Modifications, Post-Modification Recorded Investment $ 3 $ 9 $ 42 $ 9  
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 2 4 6 11  
Financing Receivable, Modifications, Post-Modification Recorded Investment $ 123 $ 572 $ 328 $ 1,539  
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 | Revolving mortgage | Non-PCI Loans          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Number of Contracts | loans 1 0 10 0  
Financing Receivable, Modifications, Post-Modification Recorded Investment $ 20 $ 0 $ 1,059 $ 0  
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans 0 0 1 0  
Financing Receivable, Modifications, Subsequent Default, Recorded Investment $ 0 $ 0 $ 31 $ 0  
Below market interest rate | Non-PCI Loans          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Number of Contracts | loans 61 71 231 229  
Financing Receivable, Modifications, Post-Modification Recorded Investment $ 6,537 $ 7,914 $ 18,611 $ 22,298  
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans 27 25 75 71  
Financing Receivable, Modifications, Subsequent Default, Recorded Investment $ 1,956 $ 1,564 $ 5,332 $ 6,372  
Below market interest rate | PCI Loans          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Number of Contracts | loans 2 2 7 7  
Financing Receivable, Modifications, Post-Modification Recorded Investment $ 322 $ 140 $ 915 $ 2,267  
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans 0 1 0 1  
Financing Receivable, Modifications, Subsequent Default, Recorded Investment $ 0 $ 79 $ 0 $ 79  
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 7 1 14  
Financing Receivable, Modifications, Post-Modification Recorded Investment $ 0 $ 128 $ 0 $ 510  
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans 0 2 0 4  
Financing Receivable, Modifications, Subsequent Default, Recorded Investment $ 0 $ 16 $ 0 $ 43  
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 $ 53  
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 10 6 33 34  
Financing Receivable, Modifications, Post-Modification Recorded Investment $ 3,643 $ 2,651 $ 8,580 $ 8,983  
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans 5 1 11 11  
Financing Receivable, Modifications, Subsequent Default, Recorded Investment $ 701 $ 32 $ 1,185 $ 1,719  
Below market interest rate | Commercial | Mortgage | PCI Loans          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Number of Contracts | loans 1 0 3 3  
Financing Receivable, Modifications, Post-Modification Recorded Investment $ 260 $ 0 $ 599 $ 2,026  
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 | Commercial | Other commercial real estate | Non-PCI Loans          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Number of Contracts | loans 2 2 3 3  
Financing Receivable, Modifications, Post-Modification Recorded Investment $ 210 $ 178 $ 211 $ 652  
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans 0 0 2 1  
Financing Receivable, Modifications, Subsequent Default, Recorded Investment $ 0 $ 0 $ 210 $ 9  
Below market interest rate | Commercial | Commercial and industrial | Non-PCI Loans          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Number of Contracts | loans 4 12 19 26  
Financing Receivable, Modifications, Post-Modification Recorded Investment $ 230 $ 2,340 $ 884 $ 3,086  
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans 2 5 5 12  
Financing Receivable, Modifications, Subsequent Default, Recorded Investment $ 30 $ 569 $ 314 $ 2,121  
Below market interest rate | Commercial | Lease financing | Non-PCI Loans          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Number of Contracts | loans 0 2 3 2  
Financing Receivable, Modifications, Post-Modification Recorded Investment $ 0 $ 81 $ 755 $ 81  
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans 0 2 2 2  
Financing Receivable, Modifications, Subsequent Default, Recorded Investment $ 0 $ 81 $ 701 $ 81  
Below market interest rate | Commercial | Other | Non-PCI Loans          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Number of Contracts | loans     1 2  
Financing Receivable, Modifications, Post-Modification Recorded Investment     $ 0 $ 125  
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans     0 1  
Financing Receivable, Modifications, Subsequent Default, Recorded Investment     $ 0 $ 81  
Below market interest rate | Noncommercial | Construction and land development | Non-PCI Loans          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Number of Contracts | loans 2 0 10 0  
Financing Receivable, Modifications, Post-Modification Recorded Investment $ 33 $ 0 $ 696 $ 0  
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans 1 0 1 0  
Financing Receivable, Modifications, Subsequent Default, Recorded Investment $ 11 $ 0 $ 11 $ 0  
Below market interest rate | Noncommercial | Consumer | Non-PCI Loans          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Number of Contracts | loans 1 3 16 6  
Financing Receivable, Modifications, Post-Modification Recorded Investment $ 4 $ 31 $ 89 $ 49  
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans 2 2 3 3  
Financing Receivable, Modifications, Subsequent Default, Recorded Investment $ 4 $ 17 $ 17 $ 17  
Below market interest rate | Noncommercial | Mortgage | Non-PCI Loans          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Number of Contracts | loans 28 37 81 137  
Financing Receivable, Modifications, Post-Modification Recorded Investment $ 1,850 $ 2,449 $ 4,570 $ 8,703  
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans 9 13 29 37  
Financing Receivable, Modifications, Subsequent Default, Recorded Investment $ 936 $ 849 $ 2,216 $ 2,301  
Below market interest rate | Noncommercial | Mortgage | PCI Loans          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Number of Contracts | loans 1 2 4 3  
Financing Receivable, Modifications, Post-Modification Recorded Investment $ 62 $ 140 $ 316 $ 188  
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans 0 1 0 1  
Financing Receivable, Modifications, Subsequent Default, Recorded Investment $ 0 $ 79 $ 0 $ 79  
Below market interest rate | Noncommercial | Other | 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 $ 44      
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans 0 0      
Financing Receivable, Modifications, Subsequent Default, Recorded Investment $ 0 $ 0      
Below market interest rate | Noncommercial | Revolving mortgage | Non-PCI Loans          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Number of Contracts | loans 14 1 64 5  
Financing Receivable, Modifications, Post-Modification Recorded Investment $ 567 $ 12 $ 2,826 $ 109  
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans 8 0 22 0  
Financing Receivable, Modifications, Subsequent Default, Recorded Investment $ 274 $ 0 $ 678 $ 0  
Discharged from bankruptcy | Non-PCI Loans          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Number of Contracts | loans 40 24 146 107  
Financing Receivable, Modifications, Post-Modification Recorded Investment $ 5,101 $ 622 $ 8,899 $ 4,510  
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans 38 16 76 41  
Financing Receivable, Modifications, Subsequent Default, Recorded Investment $ 1,892 $ 290 $ 4,379 $ 997  
Discharged from bankruptcy | PCI Loans          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Number of Contracts | loans 3 1 5 1  
Financing Receivable, Modifications, Post-Modification Recorded Investment $ 368 $ 2,985 $ 782 $ 2,985  
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans 2 0 2 0  
Financing Receivable, Modifications, Subsequent Default, Recorded Investment $ 423 $ 0 $ 423 $ 0  
Discharged from bankruptcy | Commercial | Construction and land development | 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 $ 23 $ 16 $ 23  
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans 0 1 1 1  
Financing Receivable, Modifications, Subsequent Default, Recorded Investment $ 0 $ 23 $ 16 $ 23  
Discharged from bankruptcy | Commercial | Mortgage | Non-PCI Loans          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Number of Contracts | loans 5 1 9 3  
Financing Receivable, Modifications, Post-Modification Recorded Investment $ 2,249 $ 13 $ 3,207 $ 291  
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans 1 1 2 1  
Financing Receivable, Modifications, Subsequent Default, Recorded Investment $ 429 $ 13 $ 1,134 $ 13  
Discharged from bankruptcy | Commercial | Mortgage | PCI Loans          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Number of Contracts | loans     2 1  
Financing Receivable, Modifications, Post-Modification Recorded Investment     $ 280 $ 2,985  
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans     1 0  
Financing Receivable, Modifications, Subsequent Default, Recorded Investment     $ 257 $ 0  
Discharged from bankruptcy | Commercial | Commercial and industrial | Non-PCI Loans          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Number of Contracts | loans 9 0 10 3  
Financing Receivable, Modifications, Post-Modification Recorded Investment $ 865 $ 0 $ 865 $ 135  
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans 6 0 7 0  
Financing Receivable, Modifications, Subsequent Default, Recorded Investment $ 809 $ 0 $ 809 $ 0  
Discharged from bankruptcy | Commercial | Lease financing | Non-PCI Loans          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Number of Contracts | loans 0 0 16 0  
Financing Receivable, Modifications, Post-Modification Recorded Investment $ 0 $ 0 $ 180 $ 0  
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans 15 0 15 0  
Financing Receivable, Modifications, Subsequent Default, Recorded Investment $ 180 $ 0 $ 180 $ 0  
Discharged from bankruptcy | Noncommercial | Construction and land development | Non-PCI Loans          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Number of Contracts | loans     1 0  
Financing Receivable, Modifications, Post-Modification Recorded Investment     $ 19 $ 0  
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans     1 0  
Financing Receivable, Modifications, Subsequent Default, Recorded Investment     $ 19 $ 0  
Discharged from bankruptcy | Noncommercial | Consumer | Non-PCI Loans          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Number of Contracts | loans 10 11 52 40  
Financing Receivable, Modifications, Post-Modification Recorded Investment $ 161 $ 150 $ 539 $ 467  
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans 9 5 27 12  
Financing Receivable, Modifications, Subsequent Default, Recorded Investment $ 99 $ 74 $ 212 $ 137  
Discharged from bankruptcy | Noncommercial | Mortgage | Non-PCI Loans          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Number of Contracts | loans 6 2 25 18  
Financing Receivable, Modifications, Post-Modification Recorded Investment $ 1,357 $ 29 $ 2,443 $ 1,030  
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans 2 6 10 14  
Financing Receivable, Modifications, Subsequent Default, Recorded Investment $ 186 $ 143 $ 1,134 $ 647  
Discharged from bankruptcy | Noncommercial | Mortgage | PCI Loans          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Number of Contracts | loans 2 1 3 0  
Financing Receivable, Modifications, Post-Modification Recorded Investment $ 280 $ 2,985 $ 502 $ 0  
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans 1 0 1 0  
Financing Receivable, Modifications, Subsequent Default, Recorded Investment $ 257 $ 0 $ 166 $ 0  
Discharged from bankruptcy | Noncommercial | Revolving mortgage | Non-PCI Loans          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Number of Contracts | loans 10 9 32 42  
Financing Receivable, Modifications, Post-Modification Recorded Investment $ 469 $ 407 $ 1,630 $ 2,564  
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans 5 3 13 13  
Financing Receivable, Modifications, Subsequent Default, Recorded Investment $ 189 $ 37 $ 875 $ 177  
Discharged from bankruptcy | Noncommercial | Revolving mortgage | PCI Loans          
Financing Receivable, Modifications [Line Items]          
Financing Receivable, Modifications, Number of Contracts | loans 1 0      
Financing Receivable, Modifications, Post-Modification Recorded Investment $ 88 $ 0      
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans 1 0      
Financing Receivable, Modifications, Subsequent Default, Recorded Investment $ 166 $ 0