| **Other Comprehensive Income (Loss) (Details) (USD $)In Thousands, unless otherwise specified** | 3 Months Ended | 6 Months Ended |
|-------------------------------------------------------------------------------------------------|----------------|----------------|
||
| **Accumulated Other Comprehensive Income (Loss) [Roll Forward]**                                |           |           |   |   |
| Balance at beginning of period                                                                  | $ (1,767)      | $ 5,474        | $ (6,591) | $ 7,940 |
| Unrealized gains (losses) arising during the period                                             | 5,101          | (12,915)       | 12,558 | (16,410) |
| Reclassification of realized gains during the period                                            | (4)            | (788)          | (40) | (1,087) |
| Related deferred taxes                                                                          | (1,784)        | 4,796          | (4,381) | 6,124 |
| Net change                                                                                      | 3,313          | (8,907)        | 8,137 | (11,373) |
| Balance at end of period                                                                        | $ 1,546        | $ (3,433)      | $ 1,546 | $ (3,433) |

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| - Definition
Accumulated appreciation or loss, net of tax, in value of the total of available-for-sale securities at the end of an accounting period.
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| - Definition
Amount after tax and reclassification adjustments, of appreciation (loss) in value of unsold available-for-sale securities. Excludes amounts related to other than temporary impairment (OTTI) loss.
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Amount of tax expense (benefit), after reclassification adjustments, of appreciation (loss) in value of unsold available-for-sale securities. Excludes amounts related to other than temporary impairment (OTTI) loss.
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Amount after tax of reclassification adjustment from accumulated other comprehensive income for unrealized gain (loss) realized upon the sale of available-for-sale securities.
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| - Definition
Amount before tax and reclassification adjustments of unrealized holding gain (loss) on available-for-sale securities.
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