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Investment Securities (Details) (USD $) | 9 Months Ended |
--- | --- | ---
Sep. 30, 2012 | Sep. 30, 2011 | Dec. 31, 2011
Investment securities available for sale [Abstract] |  |  |
Amortized Cost | $ 272,791,000 |  | $ 316,347,000
Gross Unrealized Gains | 9,484,000 |  | 6,156,000
Gross Unrealized Losses | 490,000 |  | 1,115,000
Estimated Fair Value | 281,785,000 |  | 321,388,000
Investment securities with continuous unrealized loss position [Abstract] |  |  |
Less than 12 Months, Fair Value | 42,531,000 |  | 100,108,000
12 Months or More, Fair Value | 5,750,000 |  | 4,125,000
Total, Fair Value | 48,281,000 |  | 104,233,000
Less than 12 Months, Unrealized Losses | 425,000 |  | 1,050,000
12 Months or More, Unrealized Losses | 65,000 |  | 65,000
Total, Unrealized Losses | 490,000 |  | 1,115,000
Unrealized losses in investment securities | 490,000 |  |
Amortized Cost [Abstract] |  |  |
Due within one year | 3,611,000 |  |
Due from one to five years | 12,117,000 |  |
Due from five to ten years | 84,014,000 |  |
Due after ten years | 13,753,000 |  |
Mortgage-backed securities | 158,548,000 |  |
Equity securities | 748,000 |  |
Total | 272,791,000 |  |
Estimated Fair Value [Abstract] |  |  |
Due within one year | 3,653,000 |  |
Due from one to five years | 12,581,000 |  |
Due from five to ten years | 89,146,000 |  |
Due after ten years | 14,864,000 |  |
Mortgage-backed securities | 160,086,000 |  |
Equity securities | 1,455,000 |  |
Total | 281,785,000 |  |
Proceeds from sales of securities available for sale | 47,062,000 | 72,292,000 |
Gross gains on sales of securities available for sale | 1,300,000 | 2,500,000 |
Gross loss on sale of securities available for sale | 103,000 | 9,000 |
Securities pledged to secure public deposits and for other purposes, fair value | 88,800,000 |  | 83,600,000
Mortgage-backed securities [Member] |  |  |
Investment securities available for sale [Abstract] |  |  |
Amortized Cost | 158,548,000 |  | 213,378,000
Gross Unrealized Gains | 1,982,000 |  | 1,371,000
Gross Unrealized Losses | 444,000 |  | 1,056,000
Estimated Fair Value | 160,086,000 |  | 213,693,000
Investment securities with continuous unrealized loss position [Abstract] |  |  |
Less than 12 Months, Fair Value | 38,125,000 |  | 95,122,000
12 Months or More, Fair Value | 5,750,000 |  | 4,125,000
Total, Fair Value | 43,875,000 |  | 99,247,000
Less than 12 Months, Unrealized Losses | 379,000 |  | 991,000
12 Months or More, Unrealized Losses | 65,000 |  | 65,000
Total, Unrealized Losses | 444,000 |  | 1,056,000
U.S. Government sponsored enterprises [Member] |  |  |
Investment securities available for sale [Abstract] |  |  |
Amortized Cost | 1,254,000 |  | 7,429,000
Gross Unrealized Gains | 40,000 |  | 265,000
Gross Unrealized Losses | 0 |  | 0
Estimated Fair Value | 1,294,000 |  | 7,694,000
Investment securities with continuous unrealized loss position [Abstract] |  |  |
Number of securities issued with unrealized losses | 21 |  |
State and political subdivisions [Member] |  |  |
Investment securities available for sale [Abstract] |  |  |
Amortized Cost | 109,456,000 |  | 92,996,000
Gross Unrealized Gains | 6,739,000 |  | 4,157,000
Gross Unrealized Losses | 46,000 |  | 56,000
Estimated Fair Value | 116,149,000 |  | 97,097,000
Investment securities with continuous unrealized loss position [Abstract] |  |  |
Less than 12 Months, Fair Value | 4,406,000 |  | 4,444,000
12 Months or More, Fair Value | 0 |  | 0
Total, Fair Value | 4,406,000 |  | 4,444,000
Less than 12 Months, Unrealized Losses | 46,000 |  | 56,000
12 Months or More, Unrealized Losses | 0 |  | 0
Total, Unrealized Losses | 46,000 |  | 56,000
Number of securities issued with unrealized losses | 7 |  |
Corporate bonds [Member] |  |  |
Investment securities available for sale [Abstract] |  |  |
Amortized Cost | 1,535,000 |  | 546,000
Gross Unrealized Gains | 16,000 |  | 0
Gross Unrealized Losses | 0 |  | 3,000
Estimated Fair Value | 1,551,000 |  | 543,000
Investment securities with continuous unrealized loss position [Abstract] |  |  |
Less than 12 Months, Fair Value |  |  | 542,000
12 Months or More, Fair Value |  |  | 0
Total, Fair Value |  |  | 542,000
Less than 12 Months, Unrealized Losses |  |  | 3,000
12 Months or More, Unrealized Losses |  |  | 0
Total, Unrealized Losses |  |  | 3,000
Trust preferred securities [Member] |  |  |
Investment securities available for sale [Abstract] |  |  |
Amortized Cost | 1,250,000 |  | 1,250,000
Gross Unrealized Gains | 0 |  | 0
Gross Unrealized Losses | 0 |  | 0
Estimated Fair Value | 1,250,000 |  | 1,250,000
Equity securities [Member] |  |  |
Investment securities available for sale [Abstract] |  |  |
Amortized Cost | 748,000 |  | 748,000
Gross Unrealized Gains | 707,000 |  | 363,000
Gross Unrealized Losses | 0 |  | 0
Estimated Fair Value | $ 1,455,000 |  | $ 1,111,000
Maximum [Member] | U.S. Government sponsored enterprises [Member] |  |  |
Investment securities with continuous unrealized loss position [Abstract] |  |  |
Number of securities issued with unrealized losses | 86 |  |
Maximum [Member] | State and political subdivisions [Member] |  |  |
Investment securities with continuous unrealized loss position [Abstract] |  |  |
Number of securities issued with unrealized losses | 143 |  |

X
- Definition Amount of available-for-sale debt securities at cost, net of adjustments of equity securities. Adjustments include, but are not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized in earnings (less any cumulative-effect adjustments, as defined) and fair value hedge accounting adjustments. + References No definition available. + Details
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