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INVESTMENT SECURITIES | 12 Months Ended
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Dec. 31, 2012
INVESTMENT SECURITIES |
INVESTMENT SECURITIES | NOTE 7: INVESTMENT SECURITIES The amortized cost and estimated fair values of available-for-sale securities by balance sheet classification are as follows:
As of December 31, 2012 |  | Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value |
Municipal obligations |  | $ | 608 |  | $ | 30 |  | $ | — |  | $ | 638 |
U.S. government securities funds |  | 995 |  | — |  | (9 | ) | 986 |
Equity securities |  | 227 |  | 228 |  | (8 | ) | 447 |
Total short-term investment securities |  | $ | 1,830 |  | $ | 258 |  | $ | (17 | ) | $ | 2,071 |
As of December 31, 2011 |  | Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value |
Municipal obligations |  | $ | 1,158 |  | $ | 51 |  | $ | — |  | $ | 1,209 |
U.S. government securities funds |  | 988 |  | — |  | (5 | ) | 983 |
Short-term deposits |  | 3,104 |  | — |  | — |  | 3,104 |
Equity securities |  | 227 |  | 159 |  | (5 | ) | 381 |
Total short-term investment securities |  | $ | 5,477 |  | $ | 210 |  | $ | (10 | ) | $ | 5,677 |
The municipal obligations held at fair value of $638 at December 31, 2012, all mature in less than three years. During 2012, 2011 and 2010, the proceeds from the sales of available-for-sale securities were $3,789, $7,697 and $125, respectively. There were no gross realized gains (losses) on sales of available-for-sale securities (net of tax) for the years ended December 31, 2012, 2011 and 2010, respectively. The Company’s trading securities portfolio totaled $1,276 and $1,429 at December 31, 2012 and 2011, respectively, and generated gains of $116, $16 and $158, for the years ended December 31, 2012, 2011 and 2010, respectively. As of December 31, 2012 and 2011, the Company had unrealized losses of $8 and $5, respectively, in its municipal obligations, short-term deposits and equity securities investments. These losses are due to the interest rate sensitivity of the municipal obligations and the performance of the overall stock market for the equity securities.

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