| **Loans and Allowance for Loan Losses (Impaired Loans, Average Recorded Investment and Interest Income Recognized) (Details) (USD $)In Thousands, unless otherwise specified** | 3 Months Ended |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|----------------|
||
| **Financing Receivable, Impaired [Line Items]**                                                                                                                                |           |   |
| With no related allowance recorded, average recorded investment                                                                                                                | $ 33,483       | $ 57,601 |
| With no related allowance recorded, interest income recognized                                                                                                                 | 127            | 113 |
| With an allowance recorded, average recorded investment                                                                                                                        | 8,031          | 16,357 |
| With an allowance recorded, interest income recognized                                                                                                                         | 51             | 17 |
| Impaired Financing Receivable, Average Recorded Investment                                                                                                                     | 41,514         | 73,958 |
| Impaired Financing Receivable, Interest Income, Cash Basis Method                                                                                                              | 178            | 130 |
| Commercial and agricultural [Member]                                                                                                                                           |           |   |
| **Financing Receivable, Impaired [Line Items]**                                                                                                                                |           |   |
| With no related allowance recorded, average recorded investment                                                                                                                | 242            | 886 |
| With no related allowance recorded, interest income recognized                                                                                                                 | 0              | 0 |
| With an allowance recorded, average recorded investment                                                                                                                        | 0              | 917 |
| With an allowance recorded, interest income recognized                                                                                                                         | 0              | 5 |
| Impaired Financing Receivable, Average Recorded Investment                                                                                                                     | 242            | 1,803 |
| Impaired Financing Receivable, Interest Income, Cash Basis Method                                                                                                              | 0              | 5 |
| Real estate - construction [Member]                                                                                                                                            |           |   |
| **Financing Receivable, Impaired [Line Items]**                                                                                                                                |           |   |
| With no related allowance recorded, average recorded investment                                                                                                                | 2,688          | 9,233 |
| With no related allowance recorded, interest income recognized                                                                                                                 | 10             | 0 |
| With an allowance recorded, average recorded investment                                                                                                                        | 650            | 2,111 |
| With an allowance recorded, interest income recognized                                                                                                                         | 2              | 0 |
| Impaired Financing Receivable, Average Recorded Investment                                                                                                                     | 3,338          | 11,344 |
| Impaired Financing Receivable, Interest Income, Cash Basis Method                                                                                                              | 12             | 0 |
| Real estate - mortgage, 1-4 family residential [Member]                                                                                                                        |           |   |
| **Financing Receivable, Impaired [Line Items]**                                                                                                                                |           |   |
| With no related allowance recorded, average recorded investment                                                                                                                | 9,050          | 13,472 |
| With no related allowance recorded, interest income recognized                                                                                                                 | 28             | 26 |
| With an allowance recorded, average recorded investment                                                                                                                        | 3,829          | 4,666 |
| With an allowance recorded, interest income recognized                                                                                                                         | 19             | 8 |
| Impaired Financing Receivable, Average Recorded Investment                                                                                                                     | 12,879         | 18,138 |
| Impaired Financing Receivable, Interest Income, Cash Basis Method                                                                                                              | 47             | 34 |
| Real estate - mortgage, commercial [Member]                                                                                                                                    |           |   |
| **Financing Receivable, Impaired [Line Items]**                                                                                                                                |           |   |
| With no related allowance recorded, average recorded investment                                                                                                                | 21,503         | 34,010 |
| With no related allowance recorded, interest income recognized                                                                                                                 | 89             | 87 |
| With an allowance recorded, average recorded investment                                                                                                                        | 3,552          | 8,663 |
| With an allowance recorded, interest income recognized                                                                                                                         | 30             | 4 |
| Impaired Financing Receivable, Average Recorded Investment                                                                                                                     | 25,055         | 42,673 |
| Impaired Financing Receivable, Interest Income, Cash Basis Method                                                                                                              | 119            | 91 |
| Consumer [Member]                                                                                                                                                              |           |   |
| **Financing Receivable, Impaired [Line Items]**                                                                                                                                |           |   |
| With no related allowance recorded, average recorded investment                                                                                                                | 0              | 0 |
| With no related allowance recorded, interest income recognized                                                                                                                 | 0              | 0 |
| With an allowance recorded, average recorded investment                                                                                                                        | 0              | 0 |
| With an allowance recorded, interest income recognized                                                                                                                         | 0              | 0 |
| Impaired Financing Receivable, Average Recorded Investment                                                                                                                     | 0              | 0 |
| Impaired Financing Receivable, Interest Income, Cash Basis Method                                                                                                              | $ 0            | $ 0 |

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|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.
+ References
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| - Definition
Amount of interest income recognized on a cash-basis method of accounting that the financing receivables (with related allowance for credit losses and without a related allowance for credit losses) were impaired.
+ References
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| - Definition
Amount of average investment of impaired financing receivables for which there is no related allowance for credit losses.
+ References
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| - Definition
Amount of interest income, recognized on cash basis, on financing receivables, for which there is no related allowance for credit losses and are recognized as impaired.
+ References
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| - Definition
Amount of average investment of impaired financing receivables for which there is a related allowance for credit losses.
+ References
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|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of interest income on financing receivables, for which there is a related allowance for credit losses, recognized on a cash-basis method of accounting that the financing receivables were impaired.
+ References
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