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Loans and Allowance for Loan Losses - Schedule of Loan Portfolio Class by Regulatory Risk Grade and Origination Year (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Financing Receivable, Credit Quality Indicator [Line Items]      
Term loans amortized cost basis by origination, current fiscal year $ 3,516,478 $ 3,783,210  
Term loans amortized cost basis by origination, before current fiscal year 3,605,979 6,965,524  
Term loans amortized cost basis by origination, two years before current fiscal year 6,748,428 7,504,636  
Term loans amortized cost basis by origination, three years before current fiscal year 6,421,195 4,404,254  
Term loans amortized cost basis by origination, four years before current fiscal year 3,779,646 3,061,633  
Term loans amortized cost basis by origination, prior 7,400,153 6,216,447  
Amortized Cost Basis 10,621,961 10,932,133  
Converted to Term Loans 515,188 536,653  
Total 42,609,028 43,404,490  
Gross charge-offs      
Year one 8,272 10,540  
Year two 20,429 17,269  
Year three 9,696 38,758  
Year four 21,447 34,274  
Year five 4,769 6,975  
Prior 29,369 30,674  
Amortized Cost Basis 66,860 44,152  
Converted to Term Loans 106 432  
Total 160,948 183,074 $ 83,710
Consumer      
Gross charge-offs      
Total 31,376 51,304 $ 38,020
Charge-off of previously established reserves for credit losses associated with the transfer to held for sale   31,300  
Commercial & Industrial      
Financing Receivable, Credit Quality Indicator [Line Items]      
Term loans amortized cost basis by origination, current fiscal year 1,918,902 1,986,629  
Term loans amortized cost basis by origination, before current fiscal year 2,024,538 2,619,103  
Term loans amortized cost basis by origination, two years before current fiscal year 2,385,222 3,001,532  
Term loans amortized cost basis by origination, three years before current fiscal year 2,480,840 1,841,896  
Term loans amortized cost basis by origination, four years before current fiscal year 1,627,809 1,460,858  
Term loans amortized cost basis by origination, prior 3,341,160 2,803,594  
Amortized Cost Basis 8,470,369 8,836,288  
Converted to Term Loans 82,289 48,593  
Total 22,331,129 22,598,493  
Gross charge-offs      
Year one 7,696 9,367  
Year two 16,575 3,436  
Year three 4,329 8,608  
Year four 9,091 26,368  
Year five 2,564 2,709  
Prior 21,971 4,933  
Amortized Cost Basis 57,162 30,696  
Converted to Term Loans 0 203  
Total 119,388 86,320  
Commercial & Industrial | Commercial, financial, and agricultural      
Financing Receivable, Credit Quality Indicator [Line Items]      
Term loans amortized cost basis by origination, current fiscal year 1,223,336 1,120,645  
Term loans amortized cost basis by origination, before current fiscal year 1,034,641 1,063,760  
Term loans amortized cost basis by origination, two years before current fiscal year 816,396 1,463,949  
Term loans amortized cost basis by origination, three years before current fiscal year 1,234,324 821,205  
Term loans amortized cost basis by origination, four years before current fiscal year 671,055 727,833  
Term loans amortized cost basis by origination, prior 1,642,005 1,266,232  
Amortized Cost Basis 7,794,946 7,947,128  
Converted to Term Loans 82,289 48,593  
Total 14,498,992 14,459,345  
Gross charge-offs      
Year one 7,696 9,367  
Year two 16,499 3,436  
Year three 3,786 8,175  
Year four 8,787 19,532  
Year five 997 1,165  
Prior 4,413 2,071  
Amortized Cost Basis 53,736 30,696  
Converted to Term Loans 0 203  
Total 95,914 74,645  
Commercial & Industrial | Owner-occupied      
Financing Receivable, Credit Quality Indicator [Line Items]      
Term loans amortized cost basis by origination, current fiscal year 695,566 865,984  
Term loans amortized cost basis by origination, before current fiscal year 989,897 1,555,343  
Term loans amortized cost basis by origination, two years before current fiscal year 1,568,826 1,537,583  
Term loans amortized cost basis by origination, three years before current fiscal year 1,246,516 1,020,691  
Term loans amortized cost basis by origination, four years before current fiscal year 956,754 733,025  
Term loans amortized cost basis by origination, prior 1,699,155 1,537,362  
Amortized Cost Basis 675,423 889,160  
Converted to Term Loans 0 0  
Total 7,832,137 8,139,148  
Gross charge-offs      
Year one 0 0  
Year two 76 0  
Year three 543 433  
Year four 304 6,836  
Year five 1,567 1,544  
Prior 17,558 2,862  
Amortized Cost Basis 3,426 0  
Converted to Term Loans 0 0  
Total 23,474 11,675  
Commercial Real Estate      
Financing Receivable, Credit Quality Indicator [Line Items]      
Term loans amortized cost basis by origination, current fiscal year 989,849 902,990  
Term loans amortized cost basis by origination, before current fiscal year 815,592 3,376,295  
Term loans amortized cost basis by origination, two years before current fiscal year 3,566,392 3,229,919  
Term loans amortized cost basis by origination, three years before current fiscal year 2,838,854 1,211,860  
Term loans amortized cost basis by origination, four years before current fiscal year 934,216 1,151,962  
Term loans amortized cost basis by origination, prior 2,587,280 2,138,962  
Amortized Cost Basis 282,436 304,770  
Converted to Term Loans 0 0  
Total 12,014,619 12,316,758  
Gross charge-offs      
Year one 0 546  
Year two 103 7,685  
Year three 527 5,668  
Year four 4,752 3,878  
Year five 35 1,893  
Prior 4,767 22,671  
Amortized Cost Basis 0 3,109  
Converted to Term Loans 0 0  
Total 10,184 45,450  
Commercial Real Estate | Investment properties      
Financing Receivable, Credit Quality Indicator [Line Items]      
Term loans amortized cost basis by origination, current fiscal year 774,358 595,623  
Term loans amortized cost basis by origination, before current fiscal year 646,708 3,145,727  
Term loans amortized cost basis by origination, two years before current fiscal year 3,414,450 3,074,155  
Term loans amortized cost basis by origination, three years before current fiscal year 2,730,301 1,163,152  
Term loans amortized cost basis by origination, four years before current fiscal year 899,829 1,102,689  
Term loans amortized cost basis by origination, prior 2,488,098 2,020,221  
Amortized Cost Basis 227,460 261,737  
Converted to Term Loans 0 0  
Total 11,181,204 11,363,304  
Gross charge-offs      
Year one 0 546  
Year two 0 7,685  
Year three 527 5,668  
Year four 4,752 3,801  
Year five 0 1,893  
Prior 4,602 22,647  
Amortized Cost Basis 0 3,109  
Converted to Term Loans 0 0  
Total 9,881 45,349  
Commercial Real Estate | 1-4 family properties      
Financing Receivable, Credit Quality Indicator [Line Items]      
Term loans amortized cost basis by origination, current fiscal year 159,927 172,554  
Term loans amortized cost basis by origination, before current fiscal year 79,934 144,699  
Term loans amortized cost basis by origination, two years before current fiscal year 97,728 119,697  
Term loans amortized cost basis by origination, three years before current fiscal year 82,526 32,577  
Term loans amortized cost basis by origination, four years before current fiscal year 29,301 30,064  
Term loans amortized cost basis by origination, prior 56,324 56,766  
Amortized Cost Basis 40,178 42,145  
Converted to Term Loans 0 0  
Total 545,918 598,502  
Gross charge-offs      
Year one 0 0  
Year two 103 0  
Year three 0 0  
Year four 0 0  
Year five 0 0  
Prior 143 24  
Amortized Cost Basis 0 0  
Converted to Term Loans 0 0  
Total 246 24  
Commercial Real Estate | Land and development      
Financing Receivable, Credit Quality Indicator [Line Items]      
Term loans amortized cost basis by origination, current fiscal year 55,564 134,813  
Term loans amortized cost basis by origination, before current fiscal year 88,950 85,869  
Term loans amortized cost basis by origination, two years before current fiscal year 54,214 36,067  
Term loans amortized cost basis by origination, three years before current fiscal year 26,027 16,131  
Term loans amortized cost basis by origination, four years before current fiscal year 5,086 19,209  
Term loans amortized cost basis by origination, prior 42,858 61,975  
Amortized Cost Basis 14,798 888  
Converted to Term Loans 0 0  
Total 287,497 354,952  
Gross charge-offs      
Year one 0 0  
Year two 0 0  
Year three 0 0  
Year four 0 77  
Year five 35 0  
Prior 22 0  
Amortized Cost Basis 0 0  
Converted to Term Loans 0 0  
Total 57 77  
Consumer      
Financing Receivable, Credit Quality Indicator [Line Items]      
Term loans amortized cost basis by origination, current fiscal year 607,727 893,591  
Term loans amortized cost basis by origination, before current fiscal year 765,849 970,126  
Term loans amortized cost basis by origination, two years before current fiscal year 796,814 1,273,185  
Term loans amortized cost basis by origination, three years before current fiscal year 1,101,501 1,350,498  
Term loans amortized cost basis by origination, four years before current fiscal year 1,217,621 448,813  
Term loans amortized cost basis by origination, prior 1,471,713 1,273,891  
Amortized Cost Basis 1,869,156 1,791,075  
Converted to Term Loans 432,899 488,060  
Total 8,263,280 8,489,239  
Gross charge-offs      
Year one 576 627  
Year two 3,751 6,148  
Year three 4,840 24,482  
Year four 7,604 4,028  
Year five 2,170 2,373  
Prior 2,631 3,070  
Amortized Cost Basis 9,698 10,347  
Converted to Term Loans 106 229  
Total 31,376 51,304  
Consumer | Consumer mortgages      
Financing Receivable, Credit Quality Indicator [Line Items]      
Term loans amortized cost basis by origination, current fiscal year 457,366 758,049  
Term loans amortized cost basis by origination, before current fiscal year 683,716 787,708  
Term loans amortized cost basis by origination, two years before current fiscal year 676,242 1,049,959  
Term loans amortized cost basis by origination, three years before current fiscal year 954,512 1,235,310  
Term loans amortized cost basis by origination, four years before current fiscal year 1,137,528 419,989  
Term loans amortized cost basis by origination, prior 1,379,387 1,160,673  
Amortized Cost Basis 25 35  
Converted to Term Loans 0 0  
Total 5,288,776 5,411,723  
Gross charge-offs      
Year one 0 0  
Year two 11 108  
Year three 0 251  
Year four 3 403  
Year five 30 402  
Prior 122 965  
Amortized Cost Basis 0 5  
Converted to Term Loans 0 0  
Total 166 2,134  
Consumer | Home equity      
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  
Amortized Cost Basis 1,398,388 1,319,339  
Converted to Term Loans 432,899 488,060  
Total 1,831,287 1,807,399  
Gross charge-offs      
Year one 0 0  
Year two 0 0  
Year three 0 0  
Year four 0 0  
Year five 0 0  
Prior 0 79  
Amortized Cost Basis 230 819  
Converted to Term Loans 106 229  
Total 336 1,127  
Consumer | Credit cards      
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  
Amortized Cost Basis 185,871 194,141  
Converted to Term Loans 0 0  
Total 185,871 194,141  
Gross charge-offs      
Year one 0 0  
Year two 0 0  
Year three 0 0  
Year four 0 0  
Year five 0 0  
Prior 0 0  
Amortized Cost Basis 7,153 7,165  
Converted to Term Loans 0 0  
Total 7,153 7,165  
Consumer | Other consumer loans      
Financing Receivable, Credit Quality Indicator [Line Items]      
Term loans amortized cost basis by origination, current fiscal year 150,361 135,542  
Term loans amortized cost basis by origination, before current fiscal year 82,133 182,418  
Term loans amortized cost basis by origination, two years before current fiscal year 120,572 223,226  
Term loans amortized cost basis by origination, three years before current fiscal year 146,989 115,188  
Term loans amortized cost basis by origination, four years before current fiscal year 80,093 28,824  
Term loans amortized cost basis by origination, prior 92,326 113,218  
Amortized Cost Basis 284,872 277,560  
Converted to Term Loans 0 0  
Total 957,346 1,075,976  
Gross charge-offs      
Year one 576 627  
Year two 3,740 6,040  
Year three 4,840 24,231  
Year four 7,601 3,625  
Year five 2,140 1,971  
Prior 2,509 2,026  
Amortized Cost Basis 2,315 2,358  
Converted to Term Loans 0 0  
Total 23,721 40,878  
Pass | Commercial & Industrial | Commercial, financial, and agricultural      
Financing Receivable, Credit Quality Indicator [Line Items]      
Term loans amortized cost basis by origination, current fiscal year 1,200,861 1,078,790  
Term loans amortized cost basis by origination, before current fiscal year 1,001,989 1,040,742  
Term loans amortized cost basis by origination, two years before current fiscal year 739,134 1,408,178  
Term loans amortized cost basis by origination, three years before current fiscal year 1,195,316 782,069  
Term loans amortized cost basis by origination, four years before current fiscal year 629,109 636,341  
Term loans amortized cost basis by origination, prior 1,586,291 1,236,433  
Amortized Cost Basis 7,372,228 7,623,255  
Converted to Term Loans 81,796 46,908  
Total 13,806,724 13,852,716  
Pass | Commercial & Industrial | Owner-occupied      
Financing Receivable, Credit Quality Indicator [Line Items]      
Term loans amortized cost basis by origination, current fiscal year 691,899 859,887  
Term loans amortized cost basis by origination, before current fiscal year 981,593 1,521,469  
Term loans amortized cost basis by origination, two years before current fiscal year 1,468,946 1,501,405  
Term loans amortized cost basis by origination, three years before current fiscal year 1,220,421 958,620  
Term loans amortized cost basis by origination, four years before current fiscal year 872,744 710,634  
Term loans amortized cost basis by origination, prior 1,621,387 1,401,416  
Amortized Cost Basis 619,519 782,180  
Converted to Term Loans 0 0  
Total 7,476,509 7,735,611  
Pass | Commercial Real Estate | Investment properties      
Financing Receivable, Credit Quality Indicator [Line Items]      
Term loans amortized cost basis by origination, current fiscal year 769,775 593,540  
Term loans amortized cost basis by origination, before current fiscal year 642,808 3,140,041  
Term loans amortized cost basis by origination, two years before current fiscal year 3,306,914 2,863,327  
Term loans amortized cost basis by origination, three years before current fiscal year 2,406,325 1,161,697  
Term loans amortized cost basis by origination, four years before current fiscal year 898,363 1,052,638  
Term loans amortized cost basis by origination, prior 2,405,650 1,900,744  
Amortized Cost Basis 227,460 261,737  
Converted to Term Loans 0 0  
Total 10,657,295 10,973,724  
Pass | Commercial Real Estate | 1-4 family properties      
Financing Receivable, Credit Quality Indicator [Line Items]      
Term loans amortized cost basis by origination, current fiscal year 159,008 167,729  
Term loans amortized cost basis by origination, before current fiscal year 79,094 142,930  
Term loans amortized cost basis by origination, two years before current fiscal year 95,050 119,054  
Term loans amortized cost basis by origination, three years before current fiscal year 81,630 31,928  
Term loans amortized cost basis by origination, four years before current fiscal year 28,845 29,740  
Term loans amortized cost basis by origination, prior 53,167 55,243  
Amortized Cost Basis 40,133 42,099  
Converted to Term Loans 0 0  
Total 536,927 588,723  
Pass | Commercial Real Estate | Land and development      
Financing Receivable, Credit Quality Indicator [Line Items]      
Term loans amortized cost basis by origination, current fiscal year 55,564 105,609  
Term loans amortized cost basis by origination, before current fiscal year 87,465 84,962  
Term loans amortized cost basis by origination, two years before current fiscal year 54,214 35,993  
Term loans amortized cost basis by origination, three years before current fiscal year 26,002 16,131  
Term loans amortized cost basis by origination, four years before current fiscal year 4,933 18,616  
Term loans amortized cost basis by origination, prior 41,749 59,605  
Amortized Cost Basis 14,798 888  
Converted to Term Loans 0 0  
Total 284,725 321,804  
Pass | Consumer | Consumer mortgages      
Financing Receivable, Credit Quality Indicator [Line Items]      
Term loans amortized cost basis by origination, current fiscal year 457,176 757,485  
Term loans amortized cost basis by origination, before current fiscal year 681,844 784,898  
Term loans amortized cost basis by origination, two years before current fiscal year 670,652 1,044,442  
Term loans amortized cost basis by origination, three years before current fiscal year 947,395 1,219,397  
Term loans amortized cost basis by origination, four years before current fiscal year 1,119,610 410,511  
Term loans amortized cost basis by origination, prior 1,341,463 1,136,541  
Amortized Cost Basis 25 35  
Converted to Term Loans 0 0  
Total 5,218,165 5,353,309  
Pass | Consumer | Home equity      
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  
Amortized Cost Basis 1,386,370 1,308,934  
Converted to Term Loans 424,891 482,679  
Total 1,811,261 1,791,613  
Pass | Consumer | Credit cards      
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  
Amortized Cost Basis 184,061 192,217  
Converted to Term Loans 0 0  
Total 184,061 192,217  
Pass | Consumer | Other consumer loans      
Financing Receivable, Credit Quality Indicator [Line Items]      
Term loans amortized cost basis by origination, current fiscal year 150,051 134,969  
Term loans amortized cost basis by origination, before current fiscal year 81,087 181,455  
Term loans amortized cost basis by origination, two years before current fiscal year 119,274 219,415  
Term loans amortized cost basis by origination, three years before current fiscal year 144,297 114,006  
Term loans amortized cost basis by origination, four years before current fiscal year 78,961 28,256  
Term loans amortized cost basis by origination, prior 91,802 112,724  
Amortized Cost Basis 284,801 277,368  
Converted to Term Loans 0 0  
Total 950,273 1,068,193  
Special Mention | Commercial & Industrial | Commercial, financial, and agricultural      
Financing Receivable, Credit Quality Indicator [Line Items]      
Term loans amortized cost basis by origination, current fiscal year 1,555 5,298  
Term loans amortized cost basis by origination, before current fiscal year 20,255 8,276  
Term loans amortized cost basis by origination, two years before current fiscal year 17,775 20,027  
Term loans amortized cost basis by origination, three years before current fiscal year 18,403 1,950  
Term loans amortized cost basis by origination, four years before current fiscal year 2,464 2,552  
Term loans amortized cost basis by origination, prior 36,817 8,412  
Amortized Cost Basis 158,968 141,580  
Converted to Term Loans 0 0  
Total 256,237 188,095  
Special Mention | Commercial & Industrial | Owner-occupied      
Financing Receivable, Credit Quality Indicator [Line Items]      
Term loans amortized cost basis by origination, current fiscal year 1,099 1,709  
Term loans amortized cost basis by origination, before current fiscal year 2,466 9,114  
Term loans amortized cost basis by origination, two years before current fiscal year 65,733 22,562  
Term loans amortized cost basis by origination, three years before current fiscal year 5,397 2,593  
Term loans amortized cost basis by origination, four years before current fiscal year 34,244 4,689  
Term loans amortized cost basis by origination, prior 12,621 48,640  
Amortized Cost Basis 0 79,031  
Converted to Term Loans 0 0  
Total 121,560 168,338  
Special Mention | Commercial Real Estate | Investment properties      
Financing Receivable, Credit Quality Indicator [Line Items]      
Term loans amortized cost basis by origination, current fiscal year 4,583 0  
Term loans amortized cost basis by origination, before current fiscal year 2,211 1,616  
Term loans amortized cost basis by origination, two years before current fiscal year 97,443 169,550  
Term loans amortized cost basis by origination, three years before current fiscal year 200,780 0  
Term loans amortized cost basis by origination, four years before current fiscal year 0 48,429  
Term loans amortized cost basis by origination, prior 68,559 33,903  
Amortized Cost Basis 0 0  
Converted to Term Loans 0 0  
Total 373,576 253,498  
Special Mention | Commercial Real Estate | 1-4 family properties      
Financing Receivable, Credit Quality Indicator [Line Items]      
Term loans amortized cost basis by origination, current fiscal year 0 3,104  
Term loans amortized cost basis by origination, before current fiscal year 0 947  
Term loans amortized cost basis by origination, two years before current fiscal year 1,060 0  
Term loans amortized cost basis by origination, three years before current fiscal year 663 184  
Term loans amortized cost basis by origination, four years before current fiscal year 169 0  
Term loans amortized cost basis by origination, prior 1,300 311  
Amortized Cost Basis 0 1  
Converted to Term Loans 0 0  
Total 3,192 4,547  
Special Mention | Commercial Real Estate | Land and development      
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 138 496  
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 25 0  
Term loans amortized cost basis by origination, four years before current fiscal year 0 0  
Term loans amortized cost basis by origination, prior 390 774  
Amortized Cost Basis 0 0  
Converted to Term Loans 0 0  
Total 553 1,270  
Substandard | Commercial & Industrial | Commercial, financial, and agricultural      
Financing Receivable, Credit Quality Indicator [Line Items]      
Term loans amortized cost basis by origination, current fiscal year 20,920 36,557  
Term loans amortized cost basis by origination, before current fiscal year 12,397 14,742  
Term loans amortized cost basis by origination, two years before current fiscal year 59,487 35,744  
Term loans amortized cost basis by origination, three years before current fiscal year 14,694 37,186  
Term loans amortized cost basis by origination, four years before current fiscal year 39,482 88,940  
Term loans amortized cost basis by origination, prior 17,028 21,032  
Amortized Cost Basis 258,070 182,069  
Converted to Term Loans 493 1,685  
Total 422,571 417,955  
Substandard | Commercial & Industrial | Owner-occupied      
Financing Receivable, Credit Quality Indicator [Line Items]      
Term loans amortized cost basis by origination, current fiscal year 2,568 4,388  
Term loans amortized cost basis by origination, before current fiscal year 5,838 24,760  
Term loans amortized cost basis by origination, two years before current fiscal year 34,147 13,616  
Term loans amortized cost basis by origination, three years before current fiscal year 20,698 59,478  
Term loans amortized cost basis by origination, four years before current fiscal year 49,766 17,702  
Term loans amortized cost basis by origination, prior 65,147 87,306  
Amortized Cost Basis 55,904 27,949  
Converted to Term Loans 0 0  
Total 234,068 235,199  
Substandard | Commercial Real Estate | Investment properties      
Financing Receivable, Credit Quality Indicator [Line Items]      
Term loans amortized cost basis by origination, current fiscal year 0 2,083  
Term loans amortized cost basis by origination, before current fiscal year 1,689 4,070  
Term loans amortized cost basis by origination, two years before current fiscal year 10,093 41,278  
Term loans amortized cost basis by origination, three years before current fiscal year 83,795 1,455  
Term loans amortized cost basis by origination, four years before current fiscal year 1,466 1,622  
Term loans amortized cost basis by origination, prior 13,884 75,850  
Amortized Cost Basis 0 0  
Converted to Term Loans 0 0  
Total 110,927 126,358  
Substandard | Commercial Real Estate | 1-4 family properties      
Financing Receivable, Credit Quality Indicator [Line Items]      
Term loans amortized cost basis by origination, current fiscal year 919 1,721  
Term loans amortized cost basis by origination, before current fiscal year 840 822  
Term loans amortized cost basis by origination, two years before current fiscal year 1,618 643  
Term loans amortized cost basis by origination, three years before current fiscal year 233 465  
Term loans amortized cost basis by origination, four years before current fiscal year 287 324  
Term loans amortized cost basis by origination, prior 1,857 1,212  
Amortized Cost Basis 45 45  
Converted to Term Loans 0 0  
Total 5,799 5,232  
Substandard | Commercial Real Estate | Land and development      
Financing Receivable, Credit Quality Indicator [Line Items]      
Term loans amortized cost basis by origination, current fiscal year 0 29,204  
Term loans amortized cost basis by origination, before current fiscal year 1,347 411  
Term loans amortized cost basis by origination, two years before current fiscal year 0 74  
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 153 593  
Term loans amortized cost basis by origination, prior 719 1,596  
Amortized Cost Basis 0 0  
Converted to Term Loans 0 0  
Total 2,219 31,878  
Substandard | Consumer | Consumer mortgages      
Financing Receivable, Credit Quality Indicator [Line Items]      
Term loans amortized cost basis by origination, current fiscal year 190 564  
Term loans amortized cost basis by origination, before current fiscal year 1,872 2,810  
Term loans amortized cost basis by origination, two years before current fiscal year 5,590 5,517  
Term loans amortized cost basis by origination, three years before current fiscal year 7,117 15,913  
Term loans amortized cost basis by origination, four years before current fiscal year 17,918 9,478  
Term loans amortized cost basis by origination, prior 37,895 23,662  
Amortized Cost Basis 0 0  
Converted to Term Loans 0 0  
Total 70,582 57,944  
Substandard | Consumer | Home equity      
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  
Amortized Cost Basis 11,464 10,231  
Converted to Term Loans 7,729 5,297  
Total 19,193 15,528  
Substandard | Consumer | Credit cards      
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  
Amortized Cost Basis 701 702  
Converted to Term Loans 0 0  
Total 701 702  
Substandard | Consumer | Other consumer loans      
Financing Receivable, Credit Quality Indicator [Line Items]      
Term loans amortized cost basis by origination, current fiscal year 310 573  
Term loans amortized cost basis by origination, before current fiscal year 1,046 963  
Term loans amortized cost basis by origination, two years before current fiscal year 1,298 3,811  
Term loans amortized cost basis by origination, three years before current fiscal year 2,692 1,182  
Term loans amortized cost basis by origination, four years before current fiscal year 1,132 568  
Term loans amortized cost basis by origination, prior 524 494  
Amortized Cost Basis 59 192  
Converted to Term Loans 0 0  
Total 7,061 7,783  
Doubtful | Commercial & Industrial | Commercial, financial, and agricultural      
Financing Receivable, Credit Quality Indicator [Line Items]      
Term loans amortized cost basis by origination, current fiscal year 0    
Term loans amortized cost basis by origination, before current fiscal year 0    
Term loans amortized cost basis by origination, two years before current fiscal year 0    
Term loans amortized cost basis by origination, three years before current fiscal year 5,911    
Term loans amortized cost basis by origination, four years before current fiscal year 0    
Term loans amortized cost basis by origination, prior 1,869    
Amortized Cost Basis 5,145    
Converted to Term Loans 0    
Total 12,925    
Doubtful | Commercial Real Estate | Investment properties      
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 39,401 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 9,714  
Amortized Cost Basis 0 0  
Converted to Term Loans 0 0  
Total 39,401 9,714  
Loss | Commercial & Industrial | Commercial, financial, and agricultural      
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 0 355  
Amortized Cost Basis 535 224  
Converted to Term Loans 0 0  
Total 535 579  
Loss | Commercial Real Estate | Investment properties      
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 5 10  
Amortized Cost Basis 0 0  
Converted to Term Loans 0 0  
Total 5 10  
Loss | Consumer | Consumer mortgages      
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 29 470  
Amortized Cost Basis 0 0  
Converted to Term Loans 0 0  
Total 29 470  
Loss | Consumer | Home equity      
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  
Amortized Cost Basis 554 174  
Converted to Term Loans 279 84  
Total 833 258  
Loss | Consumer | Credit cards      
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  
Amortized Cost Basis 1,109 1,222  
Converted to Term Loans 0 0  
Total 1,109 $ 1,222  
Loss | Consumer | Other consumer loans      
Financing Receivable, Credit Quality Indicator [Line Items]      
Term loans amortized cost basis by origination, current fiscal year 0    
Term loans amortized cost basis by origination, before current fiscal year 0    
Term loans amortized cost basis by origination, two years before current fiscal year 0    
Term loans amortized cost basis by origination, three years before current fiscal year 0    
Term loans amortized cost basis by origination, four years before current fiscal year 0    
Term loans amortized cost basis by origination, prior 0    
Amortized Cost Basis 12    
Converted to Term Loans 0    
Total $ 12