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Consolidated Statements of Comprehensive Income (Parenthetical) (USD $)
In Millions, unless otherwise specified |
12 Months Ended | |
|---|---|---|
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Dec. 31, 2013
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Dec. 31, 2012
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| Statement Of Income And Comprehensive Income [Abstract] | ||
| Tax effect on change in unrealized holding (losses) gains on available-for-sale securities arising during period | $ 1.60 | $ (0.08) |