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Investment Securities (Tables) | 3 Months Ended
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Mar. 31, 2013
Investment Securities [Abstract] |
Amortized cost, gross unrealized gains, gross unrealized losses and approximate fair values of available-for-sale securities |
|  |  |  |  | Gross |  |  | Gross |  |  |  |
|  | Amortized |  |  | Unrealized |  |  | Unrealized |  |  | Fair |
|  | Cost |  |  | Gains |  |  | Losses |  |  | Value |
March 31, 2013: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U. S. Government agency bonds |  | $ | 7,500,000 |  |  | $ | 17,280 |  |  | $ | (1,512 | ) |  | $ | 7,515,768 |
U. S. Government agency mortgage-backed securities |  |  | 25,167,949 |  |  |  | — |  |  |  | (175,006 | ) |  |  | 24,992,943 |
Corporate bonds |  |  | 9,000,000 |  |  |  | — |  |  |  | (403,581 | ) |  |  | 8,596,419 |
|  | $ | 41,667,949 |  |  | $ | 17,280 |  |  | $ | (580,099 | ) |  | $ | 41,105,130 |
December 31, 2012: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U. S. Government agency bonds |  | $ | 7,500,000 |  |  | $ | 26,170 |  |  | $ | — |  |  | $ | 7,526,170 |
U. S. Government agency mortgage-backed securities |  |  | 25,837,100 |  |  |  | — |  |  |  | (130,209 | ) |  |  | 25,706,891 |
Corporate bonds |  |  | 9,000,000 |  |  |  | — |  |  |  | (513,741 | ) |  |  | 8,486,259 |
|  | $ | 42,337,100 |  |  | $ | 26,170 |  |  | $ | (643,950 | ) |  | $ | 41,719,320 |
Gross unrealized loss and fair value of available-for-sale securities, aggregated by the length of time |
|  | Less Than 12 Months |  |  | 12 Months or More |  |  | Total |
|  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |
|  | Value |  |  | Loss |  |  | Value |  |  | Loss |  |  | Value |  |  | Loss |
March 31, 2013: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U. S. Government agency bonds |  | $ | 2,498,488 |  |  | $ | (1,512 | ) |  | $ | — |  |  | $ | — |  |  | $ | 2,498,488 |  |  | $ | (1,512 | )
U. S. Government agency mortgage—backed securities |  |  | 24,984,401 |  |  |  | (175,006 | ) |  |  | — |  |  |  | — |  |  |  | 24,984,401 |  |  |  | (175,006 | )
Corporate bonds |  |  | 2,803,191 |  |  |  | (196,809 | ) |  |  | 5,793,228 |  |  |  | (206,772 | ) |  |  | 8,596,419 |  |  |  | (403,581 | )
Totals |  | $ | 30,286,080 |  |  | $ | (373,327 | ) |  | $ | 5,793,228 |  |  | $ | (206,772 | ) |  | $ | 36,079,308 |  |  | $ | (580,099 | )
December 31, 2012: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U. S. Government agency mortgage—backed securities |  | $ | 25,670,832 |  |  | $ | (130,209 | ) |  | $ | — |  |  | $ | — |  |  | $ | 25,670,832 |  |  | $ | (130,209 | )
Corporate bonds |  |  | 2,842,368 |  |  |  | (157,632 | ) |  |  | 5,643,891 |  |  |  | (356,109 | ) |  |  | 8,486,259 |  |  |  | (513,741 | )
Totals |  | $ | 28,513,200 |  |  | $ | (287,841 | ) |  | $ | 5,643,891 |  |  | $ | (356,109 | ) |  | $ | 34,157,091 |  |  | $ | (643,950 | )
Amortized cost and fair value of available-for-sale debt securities by contractual maturity |
|  | Amortized Cost |  |  | Fair Value |
Maturity: |  |  |  |  |  |  |  |
Corporate bonds 5 to 10 years |  | $ | 9,000,000 |  |  | $ | 8,596,419 |
U.S. Government agency bonds 5 to 10 years |  |  | 7,500,000 |  |  |  | 7,515,768 |
U.S. Government agency mortgage-backed securities |  |  | 25,167,949 |  |  |  | 24,992,943 |
Total |  | $ | 41,667,949 |  |  | $ | 41,105,130 |

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- Definition For all investments in an unrealized loss position, including those for which other-than-temporary impairments have not been recognized in earnings (including investments for which a portion of an other-than-temporary impairment has been recognized in other comprehensive income), a tabular disclosure of the aggregate related fair value of investments with unrealized losses and the aggregate amount of unrealized losses (that is, the amount by which amortized cost basis exceeds fair value). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27290-111563 + Details
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