| **Income Tax (Details) - USD ($) $ in Thousands**              | 3 Months Ended | 9 Months Ended |
|----------------------------------------------------------------|----------------|----------------|
||
| **Reconciliation of Federal Statutory to Actual Tax Expense:** |           |           |   |   |
| Federal statutory income tax rate                              | 35.00%         | 35.00%         | 35.00% | 35.00% |
| Federal statutory income tax at 35%                            | $ 9,985        | $ 8,268        | $ 27,481 | $ 25,359 |
| Tax-exempt interest income                                     | (2,198)        | (1,949)        | (6,328) | (5,116) |
| Basis difference on sale of insurance subsidiary               |                |                |  | 2,252 |
| Stock compensation                                             | 6              | 8              | 19 | 26 |
| Earnings on life insurance                                     | (216)          | (249)          | (1,186) | (734) |
| Tax credits                                                    | (165)          | (145)          | (423) | (437) |
| Other                                                          | 57             | 624            | 196 | (103) |
| Actual Tax Expense                                             | $ 7,469        | $ 6,557        | $ 19,759 | $ 21,247 |
| Effective Tax Rate                                             | 26.20%         | 27.80%         | 25.20% | 29.30% |

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|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.
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|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Percentage of domestic federal statutory tax rate applicable to pretax income (loss).
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| - Definition
Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.
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| - Definition
Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to other deductions.
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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to the disposition of a business not qualifying as a discontinued operation.
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| - Definition
The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations.
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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to nondeductible equity-based compensation costs.
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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to other adjustments.
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| - Definition
Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to tax credits. Including, but not limited to, research credit, foreign tax credit, investment tax credit, and other tax credits.
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| - Definition
Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to income (loss) exempt from income taxes.
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