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Comprehensive Income Reported in Consolidated Statements of Income (Detail) (USD $)
In Thousands, unless otherwise specified |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
|
Sep. 30, 2012
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Sep. 30, 2011
|
Sep. 30, 2012
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Sep. 30, 2011
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| Comprehensive Income (Loss) [Line Items] | ||||
| Unrealized holding gains (losses) on available-for-sale securities during the period, net of tax | $ 1,313 | $ (103) | $ 2,450 | $ 1,035 |
| Unrealized gain on derivative carried at fair value during the period, net of tax | 24 | 51 | 48 | 34 |
| Accumulated Other Comprehensive Income(Loss) beginning of period | 1,723 | 544 | 562 | (577) |
| Accumulated Other Comprehensive Income, end of period | $ 3,060 | $ 492 | $ 3,060 | $ 492 |