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Loans and Allowance for Loan Losses (Loan Portfolio Credit Exposure) (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Dec. 31, 2022
Financing Receivable, Credit Quality Indicator [Line Items]          
Term loans amortized cost basis by origination, current fiscal year $ 2,190,641   $ 2,190,641   $ 7,049,731
Term loans amortized cost basis by origination, before current fiscal year 7,177,726   7,177,726   8,851,511
Term loans amortized cost basis by origination, two years before current fiscal year 8,384,486   8,384,486   5,710,982
Term loans amortized cost basis by origination, three years before current fiscal year 5,065,877   5,065,877   3,604,052
Term loans amortized cost basis by origination, four years before current fiscal year 3,369,762   3,369,762   2,412,071
Term loans amortized cost basis by origination, prior 6,915,907   6,915,907   5,209,357
Total loans 44,353,537   44,353,537   $ 43,716,353
Gross charge-offs          
Year One     74    
Year Two     4,495    
Year Three     18,999    
Year Four     6,145    
Year Five     2,664    
Prior     2,520    
Amortized Cost Basis     26,442    
Converted to Term Loans     252    
Total 36,256 $ 23,698 $ 61,591 $ 48,845  
Number of days past due     120 days   120 days
Number of days past due for charge-off     181 days   181 days
Total consumer          
Gross charge-offs          
Total 13,410 $ 7,934 $ 30,776 $ 16,862  
Charge-off of previously established reserves for credit losses associated with the transfer to held for sale 1,300   7,900    
Revolving Loans Amortized Cost Basis          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 10,678,373   10,678,373   $ 10,323,287
Revolving Loans Converted to Term Loans          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 570,765   $ 570,765   555,362
Doubtful          
Gross charge-offs          
Percentage of loan amount     50.00%    
Total commercial and industrial          
Financing Receivable, Credit Quality Indicator [Line Items]          
Term loans amortized cost basis by origination, current fiscal year 1,173,586   $ 1,173,586   2,855,387
Term loans amortized cost basis by origination, before current fiscal year 2,807,809   2,807,809   3,639,332
Term loans amortized cost basis by origination, two years before current fiscal year 3,258,397   3,258,397   2,286,853
Term loans amortized cost basis by origination, three years before current fiscal year 2,133,768   2,133,768   1,762,363
Term loans amortized cost basis by origination, four years before current fiscal year 1,610,315   1,610,315   1,281,244
Term loans amortized cost basis by origination, prior 3,135,104   3,135,104   2,252,438
Total loans 22,531,232   22,531,232   22,066,656
Gross charge-offs          
Year One     0    
Year Two     1,633    
Year Three     2,157    
Year Four     3,883    
Year Five     1,132    
Prior     604    
Amortized Cost Basis     21,102    
Total     30,714    
Total commercial and industrial | Revolving Loans Amortized Cost Basis          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 8,347,023   8,347,023   7,942,578
Total commercial and industrial | Revolving Loans Converted to Term Loans          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 65,230   65,230   46,461
Gross charge-offs          
Total     203    
Total commercial and industrial | Commercial, financial and agricultural          
Financing Receivable, Credit Quality Indicator [Line Items]          
Term loans amortized cost basis by origination, current fiscal year 607,054   607,054   1,294,696
Term loans amortized cost basis by origination, before current fiscal year 1,205,141   1,205,141   1,943,422
Term loans amortized cost basis by origination, two years before current fiscal year 1,639,994   1,639,994   1,060,864
Term loans amortized cost basis by origination, three years before current fiscal year 964,449   964,449   831,510
Term loans amortized cost basis by origination, four years before current fiscal year 793,145   793,145   560,122
Term loans amortized cost basis by origination, prior 1,446,606   1,446,606   1,061,683
Total loans 14,166,890   14,166,890   13,874,416
Gross charge-offs          
Year One     0    
Year Two     1,633    
Year Three     1,804    
Year Four     961    
Year Five     909    
Prior     604    
Amortized Cost Basis     21,102    
Converted to Term Loans     203    
Total     27,216    
Total commercial and industrial | Commercial, financial and agricultural | Revolving Loans Amortized Cost Basis          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 7,445,271   7,445,271   7,075,658
Total commercial and industrial | Commercial, financial and agricultural | Revolving Loans Converted to Term Loans          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 65,230   65,230   46,461
Total commercial and industrial | Commercial, financial and agricultural | Pass          
Financing Receivable, Credit Quality Indicator [Line Items]          
Term loans amortized cost basis by origination, current fiscal year 583,998   583,998   1,276,814
Term loans amortized cost basis by origination, before current fiscal year 1,186,752   1,186,752   1,911,353
Term loans amortized cost basis by origination, two years before current fiscal year 1,615,563   1,615,563   1,009,230
Term loans amortized cost basis by origination, three years before current fiscal year 923,404   923,404   782,100
Term loans amortized cost basis by origination, four years before current fiscal year 676,245   676,245   536,001
Term loans amortized cost basis by origination, prior 1,412,658   1,412,658   1,037,488
Total loans 13,549,321   13,549,321   13,458,804
Total commercial and industrial | Commercial, financial and agricultural | Pass | Revolving Loans Amortized Cost Basis          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 7,095,080   7,095,080   6,862,070
Total commercial and industrial | Commercial, financial and agricultural | Pass | Revolving Loans Converted to Term Loans          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 55,621   55,621   43,748
Total commercial and industrial | Commercial, financial and agricultural | Special Mention          
Financing Receivable, Credit Quality Indicator [Line Items]          
Term loans amortized cost basis by origination, current fiscal year 1,707   1,707   4,131
Term loans amortized cost basis by origination, before current fiscal year 3,273   3,273   14,289
Term loans amortized cost basis by origination, two years before current fiscal year 3,534   3,534   12,691
Term loans amortized cost basis by origination, three years before current fiscal year 1,739   1,739   6,637
Term loans amortized cost basis by origination, four years before current fiscal year 79,760   79,760   5,716
Term loans amortized cost basis by origination, prior 8,590   8,590   2,777
Total loans 227,012   227,012   129,840
Total commercial and industrial | Commercial, financial and agricultural | Special Mention | Revolving Loans Amortized Cost Basis          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 128,409   128,409   81,889
Total commercial and industrial | Commercial, financial and agricultural | Special Mention | Revolving Loans Converted to Term Loans          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 0   0   1,710
Total commercial and industrial | Commercial, financial and agricultural | Substandard          
Financing Receivable, Credit Quality Indicator [Line Items]          
Term loans amortized cost basis by origination, current fiscal year 21,349   21,349   13,751
Term loans amortized cost basis by origination, before current fiscal year 15,116   15,116   17,780
Term loans amortized cost basis by origination, two years before current fiscal year 20,897   20,897   38,943
Term loans amortized cost basis by origination, three years before current fiscal year 39,306   39,306   42,773
Term loans amortized cost basis by origination, four years before current fiscal year 37,140   37,140   18,405
Term loans amortized cost basis by origination, prior 24,995   24,995   21,418
Total loans 367,305   367,305   285,495
Total commercial and industrial | Commercial, financial and agricultural | Substandard | Revolving Loans Amortized Cost Basis          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 198,893   198,893   131,422
Total commercial and industrial | Commercial, financial and agricultural | Substandard | Revolving Loans Converted to Term Loans          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 9,609   9,609   1,003
Total commercial and industrial | Commercial, financial and agricultural | Doubtful          
Financing Receivable, Credit Quality Indicator [Line Items]          
Term loans amortized cost basis by origination, current fiscal year 0   0    
Term loans amortized cost basis by origination, before current fiscal year 0   0    
Term loans amortized cost basis by origination, two years before current fiscal year 0   0    
Term loans amortized cost basis by origination, three years before current fiscal year 0   0    
Term loans amortized cost basis by origination, four years before current fiscal year 0   0    
Term loans amortized cost basis by origination, prior 0   0    
Total loans 22,103   22,103    
Total commercial and industrial | Commercial, financial and agricultural | Doubtful | Revolving Loans Amortized Cost Basis          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 22,103   22,103    
Total commercial and industrial | Commercial, financial and agricultural | Doubtful | Revolving Loans Converted to Term Loans          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 0   0    
Total commercial and industrial | Commercial, financial and agricultural | Loss          
Financing Receivable, Credit Quality Indicator [Line Items]          
Term loans amortized cost basis by origination, current fiscal year 0   0   0
Term loans amortized cost basis by origination, before current fiscal year 0   0   0
Term loans amortized cost basis by origination, two years before current fiscal year 0   0   0
Term loans amortized cost basis by origination, three years before current fiscal year 0   0   0
Term loans amortized cost basis by origination, four years before current fiscal year 0   0   0
Term loans amortized cost basis by origination, prior 363   363   0
Total loans 1,149   1,149   277
Total commercial and industrial | Commercial, financial and agricultural | Loss | Revolving Loans Amortized Cost Basis          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 786   786   277
Total commercial and industrial | Commercial, financial and agricultural | Loss | Revolving Loans Converted to Term Loans          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 0   0   0
Total commercial and industrial | Owner-occupied          
Financing Receivable, Credit Quality Indicator [Line Items]          
Term loans amortized cost basis by origination, current fiscal year 566,532   566,532   1,560,691
Term loans amortized cost basis by origination, before current fiscal year 1,602,668   1,602,668   1,695,910
Term loans amortized cost basis by origination, two years before current fiscal year 1,618,403   1,618,403   1,225,989
Term loans amortized cost basis by origination, three years before current fiscal year 1,169,319   1,169,319   930,853
Term loans amortized cost basis by origination, four years before current fiscal year 817,170   817,170   721,122
Term loans amortized cost basis by origination, prior 1,688,498   1,688,498   1,190,755
Total loans 8,364,342   8,364,342   8,192,240
Gross charge-offs          
Year One     0    
Year Two     0    
Year Three     353    
Year Four     2,922    
Year Five     223    
Prior     0    
Amortized Cost Basis     0    
Converted to Term Loans     0    
Total     3,498    
Total commercial and industrial | Owner-occupied | Revolving Loans Amortized Cost Basis          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 901,752   901,752   866,920
Total commercial and industrial | Owner-occupied | Revolving Loans Converted to Term Loans          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 0   0   0
Total commercial and industrial | Owner-occupied | Pass          
Financing Receivable, Credit Quality Indicator [Line Items]          
Term loans amortized cost basis by origination, current fiscal year 564,996   564,996   1,537,016
Term loans amortized cost basis by origination, before current fiscal year 1,575,827   1,575,827   1,675,524
Term loans amortized cost basis by origination, two years before current fiscal year 1,586,180   1,586,180   1,137,889
Term loans amortized cost basis by origination, three years before current fiscal year 1,082,709   1,082,709   909,525
Term loans amortized cost basis by origination, four years before current fiscal year 793,757   793,757   664,734
Term loans amortized cost basis by origination, prior 1,533,957   1,533,957   1,103,500
Total loans 8,009,147   8,009,147   7,895,108
Total commercial and industrial | Owner-occupied | Pass | Revolving Loans Amortized Cost Basis          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 871,721   871,721   866,920
Total commercial and industrial | Owner-occupied | Pass | Revolving Loans Converted to Term Loans          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 0   0   0
Total commercial and industrial | Owner-occupied | Special Mention          
Financing Receivable, Credit Quality Indicator [Line Items]          
Term loans amortized cost basis by origination, current fiscal year 930   930   4,238
Term loans amortized cost basis by origination, before current fiscal year 3,578   3,578   6,760
Term loans amortized cost basis by origination, two years before current fiscal year 18,888   18,888   24,175
Term loans amortized cost basis by origination, three years before current fiscal year 24,065   24,065   13,913
Term loans amortized cost basis by origination, four years before current fiscal year 11,094   11,094   5,024
Term loans amortized cost basis by origination, prior 58,422   58,422   69,500
Total loans 134,759   134,759   123,610
Total commercial and industrial | Owner-occupied | Special Mention | Revolving Loans Amortized Cost Basis          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 17,782   17,782   0
Total commercial and industrial | Owner-occupied | Special Mention | Revolving Loans Converted to Term Loans          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 0   0   0
Total commercial and industrial | Owner-occupied | Substandard          
Financing Receivable, Credit Quality Indicator [Line Items]          
Term loans amortized cost basis by origination, current fiscal year 606   606   19,437
Term loans amortized cost basis by origination, before current fiscal year 23,263   23,263   13,381
Term loans amortized cost basis by origination, two years before current fiscal year 13,090   13,090   63,925
Term loans amortized cost basis by origination, three years before current fiscal year 46,545   46,545   7,415
Term loans amortized cost basis by origination, four years before current fiscal year 12,319   12,319   51,364
Term loans amortized cost basis by origination, prior 95,938   95,938   17,755
Total loans 204,010   204,010   173,277
Total commercial and industrial | Owner-occupied | Substandard | Revolving Loans Amortized Cost Basis          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 12,249   12,249   0
Total commercial and industrial | Owner-occupied | Substandard | Revolving Loans Converted to Term Loans          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 0   0   0
Total commercial and industrial | Owner-occupied | Loss          
Financing Receivable, Credit Quality Indicator [Line Items]          
Term loans amortized cost basis by origination, current fiscal year 0   0   0
Term loans amortized cost basis by origination, before current fiscal year 0   0   245
Term loans amortized cost basis by origination, two years before current fiscal year 245   245   0
Term loans amortized cost basis by origination, three years before current fiscal year 16,000   16,000   0
Term loans amortized cost basis by origination, four years before current fiscal year 0   0   0
Term loans amortized cost basis by origination, prior 181   181   0
Total loans 16,426   16,426   245
Total commercial and industrial | Owner-occupied | Loss | Revolving Loans Amortized Cost Basis          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 0   0   0
Total commercial and industrial | Owner-occupied | Loss | Revolving Loans Converted to Term Loans          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 0   0   0
Total commercial real estate          
Financing Receivable, Credit Quality Indicator [Line Items]          
Term loans amortized cost basis by origination, current fiscal year 514,008   514,008   3,050,240
Term loans amortized cost basis by origination, before current fiscal year 3,293,088   3,293,088   3,488,664
Term loans amortized cost basis by origination, two years before current fiscal year 3,729,002   3,729,002   1,600,213
Term loans amortized cost basis by origination, three years before current fiscal year 1,502,973   1,502,973   1,311,330
Term loans amortized cost basis by origination, four years before current fiscal year 1,278,391   1,278,391   910,001
Term loans amortized cost basis by origination, prior 2,400,564   2,400,564   1,674,752
Total loans 13,293,898   13,293,898   12,650,313
Gross charge-offs          
Year One     0    
Year Two     0    
Year Three     0    
Year Four     77    
Year Five     0    
Prior     24    
Amortized Cost Basis     0    
Converted to Term Loans     0    
Total     101    
Total commercial real estate | Revolving Loans Amortized Cost Basis          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 575,872   575,872   615,113
Total commercial real estate | Revolving Loans Converted to Term Loans          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 0   0   0
Total commercial real estate | Investment properties          
Financing Receivable, Credit Quality Indicator [Line Items]          
Term loans amortized cost basis by origination, current fiscal year 324,280   324,280   2,680,012
Term loans amortized cost basis by origination, before current fiscal year 3,007,629   3,007,629   3,248,674
Term loans amortized cost basis by origination, two years before current fiscal year 3,546,766   3,546,766   1,532,406
Term loans amortized cost basis by origination, three years before current fiscal year 1,445,882   1,445,882   1,237,232
Term loans amortized cost basis by origination, four years before current fiscal year 1,210,680   1,210,680   833,422
Term loans amortized cost basis by origination, prior 2,217,792   2,217,792   1,550,043
Total loans 12,270,266   12,270,266   11,644,047
Gross charge-offs          
Year One     0    
Year Two     0    
Year Three     0    
Year Four     0    
Year Five     0    
Prior     0    
Amortized Cost Basis     0    
Converted to Term Loans     0    
Total     0    
Total commercial real estate | Investment properties | Revolving Loans Amortized Cost Basis          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 517,237   517,237   562,258
Total commercial real estate | Investment properties | Revolving Loans Converted to Term Loans          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 0   0   0
Total commercial real estate | Investment properties | Pass          
Financing Receivable, Credit Quality Indicator [Line Items]          
Term loans amortized cost basis by origination, current fiscal year 319,091   319,091   2,671,660
Term loans amortized cost basis by origination, before current fiscal year 3,004,555   3,004,555   3,245,669
Term loans amortized cost basis by origination, two years before current fiscal year 3,469,385   3,469,385   1,532,230
Term loans amortized cost basis by origination, three years before current fiscal year 1,445,709   1,445,709   1,220,974
Term loans amortized cost basis by origination, four years before current fiscal year 1,198,543   1,198,543   775,747
Term loans amortized cost basis by origination, prior 2,091,311   2,091,311   1,543,724
Total loans 12,026,255   12,026,255   11,531,122
Total commercial real estate | Investment properties | Pass | Revolving Loans Amortized Cost Basis          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 497,661   497,661   541,118
Total commercial real estate | Investment properties | Pass | Revolving Loans Converted to Term Loans          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 0   0   0
Total commercial real estate | Investment properties | Special Mention          
Financing Receivable, Credit Quality Indicator [Line Items]          
Term loans amortized cost basis by origination, current fiscal year 0   0   2,379
Term loans amortized cost basis by origination, before current fiscal year 2,218   2,218   1,550
Term loans amortized cost basis by origination, two years before current fiscal year 76,076   76,076   0
Term loans amortized cost basis by origination, three years before current fiscal year 0   0   14,570
Term loans amortized cost basis by origination, four years before current fiscal year 10,476   10,476   5,908
Term loans amortized cost basis by origination, prior 61,316   61,316   2,388
Total loans 150,086   150,086   26,941
Total commercial real estate | Investment properties | Special Mention | Revolving Loans Amortized Cost Basis          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 0   0   146
Total commercial real estate | Investment properties | Special Mention | Revolving Loans Converted to Term Loans          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 0   0   0
Total commercial real estate | Investment properties | Substandard          
Financing Receivable, Credit Quality Indicator [Line Items]          
Term loans amortized cost basis by origination, current fiscal year 5,189   5,189   5,973
Term loans amortized cost basis by origination, before current fiscal year 856   856   1,455
Term loans amortized cost basis by origination, two years before current fiscal year 1,305   1,305   176
Term loans amortized cost basis by origination, three years before current fiscal year 173   173   1,688
Term loans amortized cost basis by origination, four years before current fiscal year 1,661   1,661   51,767
Term loans amortized cost basis by origination, prior 37,465   37,465   3,931
Total loans 66,225   66,225   85,984
Total commercial real estate | Investment properties | Substandard | Revolving Loans Amortized Cost Basis          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 19,576   19,576   20,994
Total commercial real estate | Investment properties | Substandard | Revolving Loans Converted to Term Loans          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 0   0   0
Total commercial real estate | Investment properties | Doubtful          
Financing Receivable, Credit Quality Indicator [Line Items]          
Term loans amortized cost basis by origination, current fiscal year 0   0    
Term loans amortized cost basis by origination, before current fiscal year 0   0    
Term loans amortized cost basis by origination, two years before current fiscal year 0   0    
Term loans amortized cost basis by origination, three years before current fiscal year 0   0    
Term loans amortized cost basis by origination, four years before current fiscal year 0   0    
Term loans amortized cost basis by origination, prior 27,635   27,635    
Total loans 27,635   27,635    
Total commercial real estate | Investment properties | Doubtful | Revolving Loans Amortized Cost Basis          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 0   0    
Total commercial real estate | Investment properties | Doubtful | Revolving Loans Converted to Term Loans          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 0   0    
Total commercial real estate | Investment properties | Loss          
Financing Receivable, Credit Quality Indicator [Line Items]          
Term loans amortized cost basis by origination, current fiscal year 0   0    
Term loans amortized cost basis by origination, before current fiscal year 0   0    
Term loans amortized cost basis by origination, two years before current fiscal year 0   0    
Term loans amortized cost basis by origination, three years before current fiscal year 0   0    
Term loans amortized cost basis by origination, four years before current fiscal year 0   0    
Term loans amortized cost basis by origination, prior 65   65    
Total loans 65   65    
Total commercial real estate | Investment properties | Loss | Revolving Loans Amortized Cost Basis          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 0   0    
Total commercial real estate | Investment properties | Loss | Revolving Loans Converted to Term Loans          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 0   0    
Total commercial real estate | 1-4 family properties          
Financing Receivable, Credit Quality Indicator [Line Items]          
Term loans amortized cost basis by origination, current fiscal year 116,484   116,484   249,728
Term loans amortized cost basis by origination, before current fiscal year 180,733   180,733   155,610
Term loans amortized cost basis by origination, two years before current fiscal year 126,406   126,406   44,859
Term loans amortized cost basis by origination, three years before current fiscal year 38,036   38,036   33,987
Term loans amortized cost basis by origination, four years before current fiscal year 33,074   33,074   27,889
Term loans amortized cost basis by origination, prior 69,061   69,061   57,083
Total loans 615,726   615,726   616,933
Gross charge-offs          
Year One     0    
Year Two     0    
Year Three     0    
Year Four     0    
Year Five     0    
Prior     24    
Amortized Cost Basis     0    
Converted to Term Loans     0    
Total     24    
Total commercial real estate | 1-4 family properties | Revolving Loans Amortized Cost Basis          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 51,932   51,932   47,777
Total commercial real estate | 1-4 family properties | Revolving Loans Converted to Term Loans          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 0   0   0
Total commercial real estate | 1-4 family properties | Pass          
Financing Receivable, Credit Quality Indicator [Line Items]          
Term loans amortized cost basis by origination, current fiscal year 114,841   114,841   248,418
Term loans amortized cost basis by origination, before current fiscal year 178,720   178,720   154,181
Term loans amortized cost basis by origination, two years before current fiscal year 125,043   125,043   44,032
Term loans amortized cost basis by origination, three years before current fiscal year 37,420   37,420   33,246
Term loans amortized cost basis by origination, four years before current fiscal year 32,360   32,360   27,053
Term loans amortized cost basis by origination, prior 67,586   67,586   55,543
Total loans 607,857   607,857   610,205
Total commercial real estate | 1-4 family properties | Pass | Revolving Loans Amortized Cost Basis          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 51,887   51,887   47,732
Total commercial real estate | 1-4 family properties | Pass | Revolving Loans Converted to Term Loans          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 0   0   0
Total commercial real estate | 1-4 family properties | Special Mention          
Financing Receivable, Credit Quality Indicator [Line Items]          
Term loans amortized cost basis by origination, current fiscal year 0   0   1
Term loans amortized cost basis by origination, before current fiscal year 408   408   0
Term loans amortized cost basis by origination, two years before current fiscal year 0   0   752
Term loans amortized cost basis by origination, three years before current fiscal year 193   193   0
Term loans amortized cost basis by origination, four years before current fiscal year 0   0   0
Term loans amortized cost basis by origination, prior 311   311   297
Total loans 912   912   1,050
Total commercial real estate | 1-4 family properties | Special Mention | Revolving Loans Amortized Cost Basis          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 0   0   0
Total commercial real estate | 1-4 family properties | Special Mention | Revolving Loans Converted to Term Loans          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 0   0   0
Total commercial real estate | 1-4 family properties | Substandard          
Financing Receivable, Credit Quality Indicator [Line Items]          
Term loans amortized cost basis by origination, current fiscal year 1,643   1,643   1,309
Term loans amortized cost basis by origination, before current fiscal year 1,605   1,605   1,429
Term loans amortized cost basis by origination, two years before current fiscal year 1,363   1,363   75
Term loans amortized cost basis by origination, three years before current fiscal year 423   423   741
Term loans amortized cost basis by origination, four years before current fiscal year 714   714   836
Term loans amortized cost basis by origination, prior 1,164   1,164   1,243
Total loans 6,957   6,957   5,678
Total commercial real estate | 1-4 family properties | Substandard | Revolving Loans Amortized Cost Basis          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 45   45   45
Total commercial real estate | 1-4 family properties | Substandard | Revolving Loans Converted to Term Loans          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 0   0   0
Total commercial real estate | Land and development          
Financing Receivable, Credit Quality Indicator [Line Items]          
Term loans amortized cost basis by origination, current fiscal year 73,244   73,244   120,500
Term loans amortized cost basis by origination, before current fiscal year 104,726   104,726   84,380
Term loans amortized cost basis by origination, two years before current fiscal year 55,830   55,830   22,948
Term loans amortized cost basis by origination, three years before current fiscal year 19,055   19,055   40,111
Term loans amortized cost basis by origination, four years before current fiscal year 34,637   34,637   48,690
Term loans amortized cost basis by origination, prior 113,711   113,711   67,626
Total loans 407,906   407,906   389,333
Gross charge-offs          
Year One     0    
Year Two     0    
Year Three     0    
Year Four     77    
Year Five     0    
Prior     0    
Amortized Cost Basis     0    
Converted to Term Loans     0    
Total     77    
Total commercial real estate | Land and development | Revolving Loans Amortized Cost Basis          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 6,703   6,703   5,078
Total commercial real estate | Land and development | Revolving Loans Converted to Term Loans          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 0   0   0
Total commercial real estate | Land and development | Pass          
Financing Receivable, Credit Quality Indicator [Line Items]          
Term loans amortized cost basis by origination, current fiscal year 72,661   72,661   119,801
Term loans amortized cost basis by origination, before current fiscal year 104,219   104,219   84,055
Term loans amortized cost basis by origination, two years before current fiscal year 55,794   55,794   21,984
Term loans amortized cost basis by origination, three years before current fiscal year 18,335   18,335   39,484
Term loans amortized cost basis by origination, four years before current fiscal year 34,027   34,027   18,600
Term loans amortized cost basis by origination, prior 82,124   82,124   64,854
Total loans 373,863   373,863   353,856
Total commercial real estate | Land and development | Pass | Revolving Loans Amortized Cost Basis          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 6,703   6,703   5,078
Total commercial real estate | Land and development | Pass | Revolving Loans Converted to Term Loans          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 0   0   0
Total commercial real estate | Land and development | Special Mention          
Financing Receivable, Credit Quality Indicator [Line Items]          
Term loans amortized cost basis by origination, current fiscal year 0   0   0
Term loans amortized cost basis by origination, before current fiscal year 507   507   0
Term loans amortized cost basis by origination, two years before current fiscal year 0   0   744
Term loans amortized cost basis by origination, three years before current fiscal year 0   0   0
Term loans amortized cost basis by origination, four years before current fiscal year 0   0   29,618
Term loans amortized cost basis by origination, prior 29,629   29,629   1,118
Total loans 30,136   30,136   31,480
Total commercial real estate | Land and development | Special Mention | Revolving Loans Amortized Cost Basis          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 0   0   0
Total commercial real estate | Land and development | Special Mention | Revolving Loans Converted to Term Loans          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 0   0   0
Total commercial real estate | Land and development | Substandard          
Financing Receivable, Credit Quality Indicator [Line Items]          
Term loans amortized cost basis by origination, current fiscal year 583   583   699
Term loans amortized cost basis by origination, before current fiscal year 0   0   325
Term loans amortized cost basis by origination, two years before current fiscal year 36   36   220
Term loans amortized cost basis by origination, three years before current fiscal year 720   720   627
Term loans amortized cost basis by origination, four years before current fiscal year 610   610   472
Term loans amortized cost basis by origination, prior 1,958   1,958   1,654
Total loans 3,907   3,907   3,997
Total commercial real estate | Land and development | Substandard | Revolving Loans Amortized Cost Basis          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 0   0   0
Total commercial real estate | Land and development | Substandard | Revolving Loans Converted to Term Loans          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 0   0   0
Total consumer          
Financing Receivable, Credit Quality Indicator [Line Items]          
Term loans amortized cost basis by origination, current fiscal year 503,047   503,047   1,144,104
Term loans amortized cost basis by origination, before current fiscal year 1,076,829   1,076,829   1,723,515
Term loans amortized cost basis by origination, two years before current fiscal year 1,397,087   1,397,087   1,823,916
Term loans amortized cost basis by origination, three years before current fiscal year 1,429,136   1,429,136   530,359
Term loans amortized cost basis by origination, four years before current fiscal year 481,056   481,056   220,826
Term loans amortized cost basis by origination, prior 1,380,239   1,380,239   1,282,167
Total loans 8,528,407   8,528,407   8,999,384
Gross charge-offs          
Year One     74    
Year Two     2,862    
Year Three     16,841    
Year Four     2,185    
Year Five     1,533    
Prior     1,892    
Amortized Cost Basis     5,340    
Converted to Term Loans     49    
Total     30,776    
Total consumer | Revolving Loans Amortized Cost Basis          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 1,755,478   1,755,478   1,765,596
Total consumer | Revolving Loans Converted to Term Loans          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 505,535   505,535   508,901
Total consumer | Consumer mortgages          
Financing Receivable, Credit Quality Indicator [Line Items]          
Term loans amortized cost basis by origination, current fiscal year 431,398   431,398   858,642
Term loans amortized cost basis by origination, before current fiscal year 855,176   855,176   1,195,104
Term loans amortized cost basis by origination, two years before current fiscal year 1,118,402   1,118,402   1,364,584
Term loans amortized cost basis by origination, three years before current fiscal year 1,290,277   1,290,277   467,887
Term loans amortized cost basis by origination, four years before current fiscal year 440,992   440,992   189,001
Term loans amortized cost basis by origination, prior 1,243,005   1,243,005   1,139,082
Total loans 5,379,284   5,379,284   5,214,443
Gross charge-offs          
Year One     22    
Year Two     58    
Year Three     251    
Year Four     320    
Year Five     297    
Prior     840    
Amortized Cost Basis     0    
Converted to Term Loans     0    
Total     1,788    
Total consumer | Consumer mortgages | Revolving Loans Amortized Cost Basis          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 34   34   143
Total consumer | Consumer mortgages | Revolving Loans Converted to Term Loans          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 0   0   0
Total consumer | Consumer mortgages | Pass          
Financing Receivable, Credit Quality Indicator [Line Items]          
Term loans amortized cost basis by origination, current fiscal year 431,398   431,398   857,489
Term loans amortized cost basis by origination, before current fiscal year 854,063   854,063   1,188,652
Term loans amortized cost basis by origination, two years before current fiscal year 1,113,312   1,113,312   1,356,065
Term loans amortized cost basis by origination, three years before current fiscal year 1,275,929   1,275,929   458,441
Term loans amortized cost basis by origination, four years before current fiscal year 433,164   433,164   182,834
Term loans amortized cost basis by origination, prior 1,218,986   1,218,986   1,118,686
Total loans 5,326,886   5,326,886   5,162,310
Total consumer | Consumer mortgages | Pass | Revolving Loans Amortized Cost Basis          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 34   34   143
Total consumer | Consumer mortgages | Pass | Revolving Loans Converted to Term Loans          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 0   0   0
Total consumer | Consumer mortgages | Substandard          
Financing Receivable, Credit Quality Indicator [Line Items]          
Term loans amortized cost basis by origination, current fiscal year 0   0   1,153
Term loans amortized cost basis by origination, before current fiscal year 1,113   1,113   6,452
Term loans amortized cost basis by origination, two years before current fiscal year 5,090   5,090   8,519
Term loans amortized cost basis by origination, three years before current fiscal year 14,348   14,348   9,442
Term loans amortized cost basis by origination, four years before current fiscal year 7,824   7,824   6,167
Term loans amortized cost basis by origination, prior 23,326   23,326   19,662
Total loans 51,701   51,701   51,395
Total consumer | Consumer mortgages | Substandard | Revolving Loans Amortized Cost Basis          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 0   0   0
Total consumer | Consumer mortgages | Substandard | Revolving Loans Converted to Term Loans          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 0   0   0
Total consumer | Consumer mortgages | Loss          
Financing Receivable, Credit Quality Indicator [Line Items]          
Term loans amortized cost basis by origination, current fiscal year 0   0   0
Term loans amortized cost basis by origination, before current fiscal year 0   0   0
Term loans amortized cost basis by origination, two years before current fiscal year 0   0   0
Term loans amortized cost basis by origination, three years before current fiscal year 0   0   4
Term loans amortized cost basis by origination, four years before current fiscal year 4   4   0
Term loans amortized cost basis by origination, prior 693   693   734
Total loans 697   697   738
Total consumer | Consumer mortgages | Loss | Revolving Loans Amortized Cost Basis          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 0   0   0
Total consumer | Consumer mortgages | Loss | Revolving Loans Converted to Term Loans          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 0   0   0
Total consumer | Home equity          
Financing Receivable, Credit Quality Indicator [Line Items]          
Term loans amortized cost basis by origination, current fiscal year 0   0   0
Term loans amortized cost basis by origination, before current fiscal year 0   0   0
Term loans amortized cost basis by origination, two years before current fiscal year 0   0   0
Term loans amortized cost basis by origination, three years before current fiscal year 0   0   0
Term loans amortized cost basis by origination, four years before current fiscal year 0   0   0
Term loans amortized cost basis by origination, prior 0   0   0
Total loans 1,773,987   1,773,987   1,757,038
Gross charge-offs          
Year One     0    
Year Two     0    
Year Three     0    
Year Four     0    
Year Five     0    
Prior     0    
Amortized Cost Basis     555    
Converted to Term Loans     49    
Total     604    
Total consumer | Home equity | Revolving Loans Amortized Cost Basis          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 1,268,452   1,268,452   1,248,137
Total consumer | Home equity | Revolving Loans Converted to Term Loans          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 505,535   505,535   508,901
Total consumer | Home equity | Pass          
Financing Receivable, Credit Quality Indicator [Line Items]          
Term loans amortized cost basis by origination, current fiscal year 0   0   0
Term loans amortized cost basis by origination, before current fiscal year 0   0   0
Term loans amortized cost basis by origination, two years before current fiscal year 0   0   0
Term loans amortized cost basis by origination, three years before current fiscal year 0   0   0
Term loans amortized cost basis by origination, four years before current fiscal year 0   0   0
Term loans amortized cost basis by origination, prior 0   0   0
Total loans 1,761,537   1,761,537   1,745,473
Total consumer | Home equity | Pass | Revolving Loans Amortized Cost Basis          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 1,260,275   1,260,275   1,241,201
Total consumer | Home equity | Pass | Revolving Loans Converted to Term Loans          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 501,262   501,262   504,272
Total consumer | Home equity | Substandard          
Financing Receivable, Credit Quality Indicator [Line Items]          
Term loans amortized cost basis by origination, current fiscal year 0   0   0
Term loans amortized cost basis by origination, before current fiscal year 0   0   0
Term loans amortized cost basis by origination, two years before current fiscal year 0   0   0
Term loans amortized cost basis by origination, three years before current fiscal year 0   0   0
Term loans amortized cost basis by origination, four years before current fiscal year 0   0   0
Term loans amortized cost basis by origination, prior 0   0   0
Total loans 12,017   12,017   11,046
Total consumer | Home equity | Substandard | Revolving Loans Amortized Cost Basis          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 7,860   7,860   6,534
Total consumer | Home equity | Substandard | Revolving Loans Converted to Term Loans          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 4,157   4,157   4,512
Total consumer | Home equity | Loss          
Financing Receivable, Credit Quality Indicator [Line Items]          
Term loans amortized cost basis by origination, current fiscal year 0   0   0
Term loans amortized cost basis by origination, before current fiscal year 0   0   0
Term loans amortized cost basis by origination, two years before current fiscal year 0   0   0
Term loans amortized cost basis by origination, three years before current fiscal year 0   0   0
Term loans amortized cost basis by origination, four years before current fiscal year 0   0   0
Term loans amortized cost basis by origination, prior 0   0   0
Total loans 433   433   519
Total consumer | Home equity | Loss | Revolving Loans Amortized Cost Basis          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 317   317   402
Total consumer | Home equity | Loss | Revolving Loans Converted to Term Loans          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 116   116   117
Total consumer | Credit cards          
Financing Receivable, Credit Quality Indicator [Line Items]          
Term loans amortized cost basis by origination, current fiscal year 0   0   0
Term loans amortized cost basis by origination, before current fiscal year 0   0   0
Term loans amortized cost basis by origination, two years before current fiscal year 0   0   0
Term loans amortized cost basis by origination, three years before current fiscal year 0   0   0
Term loans amortized cost basis by origination, four years before current fiscal year 0   0   0
Term loans amortized cost basis by origination, prior 0   0   0
Total loans 187,677   187,677   203,612
Gross charge-offs          
Year One     0    
Year Two     0    
Year Three     0    
Year Four     0    
Year Five     0    
Prior     0    
Amortized Cost Basis     3,513    
Converted to Term Loans     0    
Total     3,513    
Total consumer | Credit cards | Revolving Loans Amortized Cost Basis          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 187,677   187,677   203,612
Total consumer | Credit cards | Revolving Loans Converted to Term Loans          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 0   0   0
Total consumer | Credit cards | Pass          
Financing Receivable, Credit Quality Indicator [Line Items]          
Term loans amortized cost basis by origination, current fiscal year 0   0   0
Term loans amortized cost basis by origination, before current fiscal year 0   0   0
Term loans amortized cost basis by origination, two years before current fiscal year 0   0   0
Term loans amortized cost basis by origination, three years before current fiscal year 0   0   0
Term loans amortized cost basis by origination, four years before current fiscal year 0   0   0
Term loans amortized cost basis by origination, prior 0   0   0
Total loans 185,639   185,639   201,898
Total consumer | Credit cards | Pass | Revolving Loans Amortized Cost Basis          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 185,639   185,639   201,898
Total consumer | Credit cards | Pass | Revolving Loans Converted to Term Loans          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 0   0   0
Total consumer | Credit cards | Substandard          
Financing Receivable, Credit Quality Indicator [Line Items]          
Term loans amortized cost basis by origination, current fiscal year 0   0   0
Term loans amortized cost basis by origination, before current fiscal year 0   0   0
Term loans amortized cost basis by origination, two years before current fiscal year 0   0   0
Term loans amortized cost basis by origination, three years before current fiscal year 0   0   0
Term loans amortized cost basis by origination, four years before current fiscal year 0   0   0
Term loans amortized cost basis by origination, prior 0   0   0
Total loans 765   765   617
Total consumer | Credit cards | Substandard | Revolving Loans Amortized Cost Basis          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 765   765   617
Total consumer | Credit cards | Substandard | Revolving Loans Converted to Term Loans          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 0   0   0
Total consumer | Credit cards | Loss          
Financing Receivable, Credit Quality Indicator [Line Items]          
Term loans amortized cost basis by origination, current fiscal year 0   0   0
Term loans amortized cost basis by origination, before current fiscal year 0   0   0
Term loans amortized cost basis by origination, two years before current fiscal year 0   0   0
Term loans amortized cost basis by origination, three years before current fiscal year 0   0   0
Term loans amortized cost basis by origination, four years before current fiscal year 0   0   0
Term loans amortized cost basis by origination, prior 0   0   0
Total loans 1,273   1,273   1,097
Total consumer | Credit cards | Loss | Revolving Loans Amortized Cost Basis          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 1,273   1,273   1,097
Total consumer | Credit cards | Loss | Revolving Loans Converted to Term Loans          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 0   0   0
Total consumer | Other consumer loans          
Financing Receivable, Credit Quality Indicator [Line Items]          
Term loans amortized cost basis by origination, current fiscal year 71,649   71,649   285,462
Term loans amortized cost basis by origination, before current fiscal year 221,653   221,653   528,411
Term loans amortized cost basis by origination, two years before current fiscal year 278,685   278,685   459,332
Term loans amortized cost basis by origination, three years before current fiscal year 138,859   138,859   62,472
Term loans amortized cost basis by origination, four years before current fiscal year 40,064   40,064   31,825
Term loans amortized cost basis by origination, prior 137,234   137,234   143,085
Total loans 1,187,459   1,187,459   1,824,291
Gross charge-offs          
Year One     52    
Year Two     2,804    
Year Three     16,591    
Year Four     1,865    
Year Five     1,235    
Prior     1,052    
Amortized Cost Basis     1,272    
Converted to Term Loans     0    
Total     24,871    
Total consumer | Other consumer loans | Revolving Loans Amortized Cost Basis          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 299,315   299,315   313,704
Total consumer | Other consumer loans | Revolving Loans Converted to Term Loans          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 0   0   0
Total consumer | Other consumer loans | Pass          
Financing Receivable, Credit Quality Indicator [Line Items]          
Term loans amortized cost basis by origination, current fiscal year 71,649   71,649   284,045
Term loans amortized cost basis by origination, before current fiscal year 220,975   220,975   524,601
Term loans amortized cost basis by origination, two years before current fiscal year 275,382   275,382   457,684
Term loans amortized cost basis by origination, three years before current fiscal year 137,128   137,128   61,760
Term loans amortized cost basis by origination, four years before current fiscal year 39,518   39,518   31,662
Term loans amortized cost basis by origination, prior 136,511   136,511   142,189
Total loans 1,180,322   1,180,322   1,815,506
Total consumer | Other consumer loans | Pass | Revolving Loans Amortized Cost Basis          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 299,159   299,159   313,565
Total consumer | Other consumer loans | Pass | Revolving Loans Converted to Term Loans          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 0   0   0
Total consumer | Other consumer loans | Substandard          
Financing Receivable, Credit Quality Indicator [Line Items]          
Term loans amortized cost basis by origination, current fiscal year 0   0   1,417
Term loans amortized cost basis by origination, before current fiscal year 678   678   3,810
Term loans amortized cost basis by origination, two years before current fiscal year 3,303   3,303   1,648
Term loans amortized cost basis by origination, three years before current fiscal year 1,731   1,731   712
Term loans amortized cost basis by origination, four years before current fiscal year 546   546   163
Term loans amortized cost basis by origination, prior 717   717   888
Total loans 7,078   7,078   8,777
Total consumer | Other consumer loans | Substandard | Revolving Loans Amortized Cost Basis          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 103   103   139
Total consumer | Other consumer loans | Substandard | Revolving Loans Converted to Term Loans          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 0   0   0
Total consumer | Other consumer loans | Loss          
Financing Receivable, Credit Quality Indicator [Line Items]          
Term loans amortized cost basis by origination, current fiscal year 0   0   0
Term loans amortized cost basis by origination, before current fiscal year 0   0   0
Term loans amortized cost basis by origination, two years before current fiscal year 0   0   0
Term loans amortized cost basis by origination, three years before current fiscal year 0   0   0
Term loans amortized cost basis by origination, four years before current fiscal year 0   0   0
Term loans amortized cost basis by origination, prior 6   6   8
Total loans 59   59   8
Total consumer | Other consumer loans | Loss | Revolving Loans Amortized Cost Basis          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans 53   53   0
Total consumer | Other consumer loans | Loss | Revolving Loans Converted to Term Loans          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total loans $ 0   $ 0   $ 0