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Available for Sale Securities | 9 Months Ended
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Sep. 30, 2013
Investments, Debt and Equity Securities [Abstract] |
Available for Sale Securities | Available for Sale Securities The amortized cost and fair values of available for sale securities held as of September 30, 2013 and December 31, 2012 are as follows:
| September 30, 2013
| Amortized cost |  | Gross unrealized gains |  | Gross unrealized losses |  | Fair value
U.S. Treasury securities and obligations of U.S. government authorities and agencies | $ | 11,970 |  |  | $ | 195 |  |  | $ | (56 | ) |  | $ | 12,109 |
Corporate securities | 5,390 |  |  | 78 |  |  | (44 | ) |  | 5,424 |
Certificates of deposit | 100 |  |  | — |  |  | — |  |  | 100 |
Asset-backed securities | 86 |  |  | 2 |  |  | — |  |  | 88 |
| $ | 17,546 |  |  | $ | 275 |  |  | $ | (100 | ) |  | $ | 17,721 |
| December 31, 2012
| Amortized cost |  | Gross unrealized gains |  | Gross unrealized losses |  | Fair value
U.S. Treasury securities and obligations of U.S. government authorities and agencies | $ | 8,731 |  |  | $ | 412 |  |  | $ | (3 | ) |  | $ | 9,140 |
Obligations of states and political subdivisions | 475 |  |  | 3 |  |  | — |  |  | 478 |
Corporate securities | 6,076 |  |  | 206 |  |  | (5 | ) |  | 6,277 |
Certificates of deposit | 100 |  |  | — |  |  | — |  |  | 100 |
Asset-backed securities | 311 |  |  | 5 |  |  | (8 | ) |  | 308 |
| $ | 15,693 |  |  | $ | 626 |  |  | $ | (16 | ) |  | $ | 16,303 |
The following table summarizes the gross unrealized losses on available for sale securities in an unrealized loss position as of September 30, 2013 and December 31, 2012:
| September 30, 2013
| Less Than or Equal to One Year |  | More Than One Year
| Fair Value |  | Gross Unrealized Losses |  | Fair Value |  | Gross Unrealized Losses
U.S. Treasury securities and obligations of U.S. government authorities and agencies | $ | 3,754 |  |  | $ | (52 | ) |  | $ | 287 |  |  | $ | (4 | )
Corporate securities | 2,233 |  |  | (44 | ) |  | — |  |  | — |
Asset-backed securities | — |  |  | — |  |  | 2 |  |  | — |
Total | $ | 5,987 |  |  | $ | (96 | ) |  | $ | 289 |  |  | $ | (4 | )
| December 31, 2012
| Less Than or Equal to One Year |  | More Than One Year
| Fair Value |  | Gross Unrealized Losses |  | Fair Value |  | Gross Unrealized Losses
U.S. Treasury securities and obligations of U.S. government authorities and agencies | $ | 612 |  |  | $ | (3 | ) |  | $ | — |  |  | $ | — |
Corporate securities | 540 |  |  | (3 | ) |  | 149 |  |  | (2 | )
Asset-backed securities | — |  |  | — |  |  | 194 |  |  | (8 | )
Total | $ | 1,152 |  |  | $ | (6 | ) |  | $ | 343 |  |  | $ | (10 | )
At September 30, 2013, the Company held two securities which were in an unrealized loss position for more than one year. The total unrealized losses on these securities were $4 and the fair value was $289. At December 31, 2012, the Company had three securities that were in an unrealized loss position for more than one year. The total unrealized losses on these securities were $10 and the fair value was $343. The unrealized losses were attributable to changes in interest rates and not credit-related issues. There have been no other‑than‑temporary impairments recorded by the Company in 2013 or 2012. The amortized cost and fair values of investments of these debt securities at September 30, 2013, by contractual maturity date, are shown below. Expected maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties.
| Amortized Cost |  | Fair Value
Due in one year or less | $ | 403 |  |  | $ | 404 |
Due after one year through five years | 11,190 |  |  | 11,287 |
Due after five years through ten years | 5,287 |  |  | 5,352 |
Due after ten years through twenty years | 580 |  |  | 590 |
Asset-backed securities | 86 |  |  | 88 |
| $ | 17,546 |  |  | $ | 17,721 |
Purchases of available for sale debt securities were $7,790 and $7,091 for the periods ended September 30, 2013 and 2012, respectively. Proceeds from maturities of available for sale debt securities were $470 and $724 for these same periods. Proceeds from sales of available for sale debt securities for the period ended September 30, 2013 were $5,411 with associated gains of $74. For the same period in 2012, proceeds from sales of available for sale debt securities were $10,934 with associated gains of $455.

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