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Intangible Assets (Schedule Of Acquired Intangible Assets) (Details) (USD $)
In Thousands, unless otherwise specified |
Jun. 30, 2012
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Dec. 31, 2011
|
|---|---|---|
| Acquired Finite-Lived Intangible Assets [Line Items] | ||
| Gross Carrying Amount | $ 14,705 | $ 14,705 |
| Accumulated Amortization | 9,916 | 9,441 |
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Core Deposit Intangibles [Member]
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| Acquired Finite-Lived Intangible Assets [Line Items] | ||
| Gross Carrying Amount | 14,124 | 14,124 |
| Accumulated Amortization | 9,916 | 9,441 |
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Missouri Charter [Member]
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| Acquired Finite-Lived Intangible Assets [Line Items] | ||
| Gross Carrying Amount | 581 | 581 |
| Accumulated Amortization |