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Investment Securities (Tables) | 9 Months Ended
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Sep. 30, 2012
Investment Securities [Abstract] |
Summary of cost basis and fair values of investment securities |
|  | September 30, 2012 |
|  |  |  |  | Gross |  |  | Gross |  |  |  |
|  | Cost |  |  | Unrealized |  |  | Unrealized |  |  | Fair |
|  | Basis |  |  | Gains |  |  | Losses |  |  | Value |
US Agency |  | $ | 6,848 |  |  | $ | 80 |  |  | $ | — |  |  | $ | 6,928 |
US Agency mortgage- backed securities |  |  | 145,796 |  |  |  | 7,460 |  |  |  | (8 | ) |  |  | 153,248 |
Corporate bonds |  |  | 6,991 |  |  |  | 12 |  |  |  | (70 | ) |  |  | 6,933 |
Total |  | $ | 159,635 |  |  | $ | 7,552 |  |  | $ | (78 | ) |  | $ | 167,109 |
|  | September 30, 2012 |
|  |  |  |  | Gross |  |  | Gross |  |  |  |
|  | Cost |  |  | Unrealized |  |  | Unrealized |  |  | Fair |
|  | Basis |  |  | Gains |  |  | Losses |  |  | Value |
US Agency mortgage- backed securities |  | $ | 10,215 |  |  | $ | 738 |  |  | $ | — |  |  | $ | 10,953 |
Corporate bonds and other securities |  |  | 3,995 |  |  |  | — |  |  |  | (80 | ) |  |  | 3,915 |
Total |  | $ | 14,210 |  |  | $ | 738 |  |  | $ | (80 | ) |  | $ | 14,868 |
|  | December 31, 2011 |
|  | Cost Basis |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Fair Value |
US Agency |  | $ | 10,689 |  |  | $ | 48 |  |  | $ | (28 | ) |  | $ | 10,709 |
US Agency mortgage- backed securities |  |  | 165,484 |  |  |  | 6,737 |  |  |  | (7 | ) |  |  | 172,214 |
Total |  | $ | 176,173 |  |  | $ | 6,785 |  |  | $ | (35 | ) |  | $ | 182,923 |
|  | December 31, 2011 |
|  | Cost Basis |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Fair Value |
US Agency mortgage- backed securities |  | $ | 9,280 |  |  | $ | 643 |  |  | $ | — |  |  | $ | 9,923 |
Other securities |  |  | 3,000 |  |  |  | — |  |  |  | (9 | ) |  |  | 2,991 |
Total |  | $ | 12,280 |  |  | $ | 643 |  |  | $ | (9 | ) |  | $ | 12,914 |
Information concerning investments with unrealized losses |
|  | September 30, 2012 |
|  | Less than 12 months |  |  | 12 months or longer |  |  | Total |
|  | Fair Value |  |  | Unrealized Losses |  |  | Fair Value |  |  | Unrealized Losses |  |  | Fair Value |  |  | Unrealized Losses |
US Agency mortgage- backed securities |  | $ | 1,024 |  |  | $ | (4 | ) |  | $ | 400 |  |  | $ | (4 | ) |  | $ | 1,424 |  |  | $ | (8 | )
Corporate bonds |  |  | 5,929 |  |  |  | (70 | ) |  |  | — |  |  |  | — |  |  |  | 5,929 |  |  |  | (70 | )
Total |  | $ | 6,953 |  |  | $ | (74 | ) |  | $ | 400 |  |  | $ | (4 | ) |  | $ | 7,353 |  |  | $ | (78 | )
|  | September 30, 2012 |
|  | Less than 12 months |  |  | 12 months or longer |  |  | Total |
|  | Fair Value |  |  | Unrealized Losses |  |  | Fair Value |  |  | Unrealized Losses |  |  | Fair Value |  |  | Unrealized Losses |
Corporate bonds and other securities |  | $ | 1,942 |  |  | $ | (54 | ) |  | $ | 1,973 |  |  | $ | (26 | ) |  | $ | 3,915 |  |  | $ | (80 | )
Total |  | $ | 1,942 |  |  | $ | (54 | ) |  | $ | 1,973 |  |  | $ | (26 | ) |  | $ | 3,915 |  |  | $ | (80 | )
|  | December 31, 2011 |
|  | Less than 12 months |  |  | 12 months or longer |  |  | Total |
|  | Fair Value |  |  | Unrealized Losses |  |  | Fair Value |  |  | Unrealized Losses |  |  | Fair Value |  |  | Unrealized Losses |
US Agency |  | $ | 3,161 |  |  | $ | (28 | ) |  | $ | — |  |  | $ | — |  |  | $ | 3,161 |  |  | $ | (28 | )
US Agency mortgage- backed securities |  |  | 613 |  |  |  | (7 | ) |  |  | — |  |  |  | — |  |  |  | 613 |  |  |  | (7 | )
Total |  | $ | 3,774 |  |  | $ | (35 | ) |  | $ | — |  |  | $ | — |  |  | $ | 3,774 |  |  | $ | (35 | )
|  | December 31, 2011 |
|  | Less than 12 months |  |  | 12 months or longer |  |  | Total |
|  | Fair Value |  |  | Unrealized Losses |  |  | Fair Value |  |  | Unrealized Losses |  |  | Fair Value |  |  | Unrealized Losses |
Other securities |  | $ | 1,991 |  |  | $ | (9 | ) |  | $ | — |  |  | $ | — |  |  | $ | 1,991 |  |  | $ | (9 | )
Total |  | $ | 1,991 |  |  | $ | (9 | ) |  | $ | — |  |  | $ | — |  |  | $ | 1,991 |  |  | $ | (9 | )
Contractual maturities of securities |
|  | September 30, 2012 |
Cost Basis |  | US Agency |  |  | US Agency Mortgage- Backed Securities |  |  | Corporate Bonds |  |  | Total Investment Securities Available For Sale |
After 1 year but within 5 years |  | $ | 6,848 |  |  | $ | — |  |  | $ | 6,991 |  |  | $ | 13,839 |
After 5 years but within 10 years |  |  | — |  |  |  | 15,661 |  |  |  | — |  |  |  | 15,661 |
After 10 years but within15 years |  |  | — |  |  |  | 65,666 |  |  |  | — |  |  |  | 65,666 |
Over 15 years |  |  | — |  |  |  | 64,469 |  |  |  | — |  |  |  | 64,469 |
Total |  | $ | 6,848 |  |  | $ | 145,796 |  |  | $ | 6,991 |  |  | $ | 159,635 |
|  | September 30, 2012 |
Fair Value |  | US Agency |  |  | US Agency Mortgage- Backed Securities |  |  | Corporate Bonds |  |  | Total Investment Securities Available For Sale |
After 1 year but within 5 years |  | $ | 6,928 |  |  | $ | — |  |  | $ | 6,933 |  |  | $ | 13,861 |
After 5 years but within 10 years |  |  | — |  |  |  | 16,562 |  |  |  | — |  |  |  | 16,562 |
After 10 years but within15 years |  |  | — |  |  |  | 69,047 |  |  |  | — |  |  |  | 69,047 |
Over 15 years |  |  | — |  |  |  | 67,639 |  |  |  | — |  |  |  | 67,639 |
Total |  | $ | 6,928 |  |  | $ | 153,248 |  |  | $ | 6,933 |  |  | $ | 167,109 |
|  | September 30, 2012 |
Cost Basis |  | US Agency Mortgage- Backed Securities |  |  | Corporate Bonds and Other Securities |  |  | Total Investment Securities Held To Maturity |
Within 1 year |  | $ | — |  |  | $ | 2,000 |  |  | $ | 2,000 |
After 1 year but within 5 years |  |  | — |  |  |  | 1,000 |  |  |  | 1,000 |
Over 15 years |  |  | 10,215 |  |  |  | 995 |  |  |  | 11,210 |
Total |  | $ | 10,215 |  |  | $ | 3,995 |  |  | $ | 14,210 |
|  | September 30, 2012 |
Fair Value |  | US Agency Mortgage- Backed Securities |  |  | Corporate Bonds and Other Securities |  |  | Total Investment Securities Held To Maturity |
Within 1 year |  | $ | — |  |  | $ | 1,974 |  |  | $ | 1,974 |
After 1 year but within 5 years |  |  | — |  |  |  | 961 |  |  |  | 961 |
Over 15 years |  |  | 10,953 |  |  |  | 980 |  |  |  | 11,933 |
Total |  | $ | 10,953 |  |  | $ | 3,915 |  |  | $ | 14,868 |

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- Definition Tabular disclosure of the reconciliation of available-for-sale securities from cost basis to fair value. + References No definition available. + Details
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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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