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INVESTMENT SECURITIES (Details 2) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Trading securities portfolio |  |  |
Trading securities portfolio | $ 1,276 | $ 1,429 |
Gains | 116 | 16 | 158
Losses | $ 8 | $ 5 |

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