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Investment Securities (Schedule of Unrealized Losses Not Recognized in Income) (Details) (USD $) | 6 Months Ended | 12 Months Ended
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Jun. 30, 2012 | Dec. 31, 2011
Schedule of Investments [Line Items] |  |
Investment Securities Available-for-Sale: Less than 12 months, fair value | $ 78,908,000 |
Investment Securities Available-for-Sale: Less than 12 months, unrealized losses | (864,000) |
Investment Securities Available-for-Sale: 12 Months or Longer, fair value | 48,781,000 |
Investment Securities Available-for-Sale: 12 months or longer, unrealized losses | (4,207,000) |
Investment Securities Available-for-Sale: Total, fair value | 127,689,000 |
Investment Securities Available-for-Sale: Total, unrealized losses | (5,071,000) |
Investment Securities Held-to-Maturity: Less than 12 months, fair value | 7,697,000 | 18,187,000
Investment Securities Held-to-Maturity: 12 months or less, unrealized losses | (31,000) | (103,000)
Investment Securities Held-to-Maturity: Total, fair value | 7,697,000 | 18,187,000
Investment Securities Held-to-Maturity: Total, unrealized losses | (31,000) | (103,000)
Temporarily Impaired Securities, Total Fair Value | 135,386 | 143,892,000
Temporarily Impaired Securities, Total Unrealized Losses | (5,102) | (10,249,000)
Temporarily Impaired Securities, Less than 12 Months, Fair Value | 86,605 | 122,295,000
Temporarily Impaired Securities, Less than 12 Months, Aggregate Losses | (895) | (4,817,000)
Temporarily Impaired Securities, 12 months or longer, Fair Value | 48,781 | 21,597,000
Temporarily Impaired Securities, 12 months or longer, Aggregate losses | (4,207) | (5,432,000)
Commercial mortgage-backed securities [Member] |  |
Schedule of Investments [Line Items] |  |
Investment Securities Available-for-Sale: Less than 12 months, fair value | 3,080,000 |
Investment Securities Available-for-Sale: Less than 12 months, unrealized losses | (17,000) |
Investment Securities Available-for-Sale: Total, fair value | 3,080,000 |
Investment Securities Available-for-Sale: Total, unrealized losses | (17,000) |
Investment Securities Held-to-Maturity: Less than 12 months, fair value | 1,538,000 |
Investment Securities Held-to-Maturity: 12 months or less, unrealized losses | (8,000) |
Investment Securities Held-to-Maturity: Total, fair value | 1,538,000 |
Investment Securities Held-to-Maturity: Total, unrealized losses | (8,000) |
Residential mortgage-backed securities [Member] |  |
Schedule of Investments [Line Items] |  |
Investment Securities Available-for-Sale: Less than 12 months, fair value |  | 2,013,000
Investment Securities Available-for-Sale: Less than 12 months, unrealized losses |  | (6,000)
Investment Securities Available-for-Sale: Total, fair value |  | 2,013,000
Investment Securities Available-for-Sale: Total, unrealized losses |  | (6,000)
Obligations of U.S. states and political subdivisions [Member] |  |
Schedule of Investments [Line Items] |  |
Investment Securities Available-for-Sale: Less than 12 months, fair value | 13,166,000 | 4,352,000
Investment Securities Available-for-Sale: Less than 12 months, unrealized losses | (203,000) | (36,000)
Investment Securities Available-for-Sale: Total, fair value | 13,166,000 | 4,352,000
Investment Securities Available-for-Sale: Total, unrealized losses | (203,000) | (36,000)
Investment Securities Held-to-Maturity: Less than 12 months, fair value | 1,021,000 |
Investment Securities Held-to-Maturity: 12 months or less, unrealized losses | (1,000) |
Investment Securities Held-to-Maturity: Total, fair value | 1,021,000 |
Investment Securities Held-to-Maturity: Total, unrealized losses | (1,000) |
Trust preferred securities [Member] |  |
Schedule of Investments [Line Items] |  |
Investment Securities Available-for-Sale: Less than 12 months, fair value |  | 4,325,000
Investment Securities Available-for-Sale: Less than 12 months, unrealized losses |  | (996,000)
Investment Securities Available-for-Sale: 12 Months or Longer, fair value | 14,059,000 | 10,947,000
Investment Securities Available-for-Sale: 12 months or longer, unrealized losses | (1,827,000) | (3,398,000)
Investment Securities Available-for-Sale: Total, fair value | 14,059,000 | 15,272,000
Investment Securities Available-for-Sale: Total, unrealized losses | (1,827,000) | (4,394,000)
Corporate bonds and notes [Member] |  |
Schedule of Investments [Line Items] |  |
Investment Securities Available-for-Sale: Less than 12 months, fair value | 54,310,000 | 89,534,000
Investment Securities Available-for-Sale: Less than 12 months, unrealized losses | (517,000) | (3,663,000)
Investment Securities Available-for-Sale: 12 Months or Longer, fair value | 31,643,000 | 7,509,000
Investment Securities Available-for-Sale: 12 months or longer, unrealized losses | (1,070,000) | (414,000)
Investment Securities Available-for-Sale: Total, fair value | 85,953,000 | 97,043,000
Investment Securities Available-for-Sale: Total, unrealized losses | (1,587,000) | (4,077,000)
Collateralized mortgage obligations [Member] |  |
Schedule of Investments [Line Items] |  |
Investment Securities Available-for-Sale: 12 Months or Longer, fair value | 1,752,000 | 1,899,000
Investment Securities Available-for-Sale: 12 months or longer, unrealized losses | (1,102,000) | (1,327,000)
Investment Securities Available-for-Sale: Total, fair value | 1,752,000 | 1,899,000
Investment Securities Available-for-Sale: Total, unrealized losses | (1,102,000) | (1,327,000)
Investment Securities Held-to-Maturity: Less than 12 months, fair value |  | 6,207,000
Investment Securities Held-to-Maturity: 12 months or less, unrealized losses |  | (69,000)
Investment Securities Held-to-Maturity: Total, fair value |  | 6,207,000
Investment Securities Held-to-Maturity: Total, unrealized losses |  | (69,000)
Asset-backed securities [Member] |  |
Schedule of Investments [Line Items] |  |
Investment Securities Available-for-Sale: Less than 12 months, fair value | 8,352,000 | 3,884,000
Investment Securities Available-for-Sale: Less than 12 months, unrealized losses | (127,000) | (13,000)
Investment Securities Available-for-Sale: Total, fair value | 8,352,000 | 3,884,000
Investment Securities Available-for-Sale: Total, unrealized losses | (127,000) | (13,000)
Equity securities [Member] |  |
Schedule of Investments [Line Items] |  |
Investment Securities Available-for-Sale: 12 Months or Longer, fair value | 349,000 | 262,000
Investment Securities Available-for-Sale: 12 months or longer, unrealized losses | (187,000) | (273,000)
Investment Securities Available-for-Sale: Total, fair value | 349,000 | 262,000
Investment Securities Available-for-Sale: Total, unrealized losses | (187,000) | (273,000)
Other securities [Member] |  |
Schedule of Investments [Line Items] |  |
Investment Securities Available-for-Sale: 12 Months or Longer, fair value | 978,000 | 980,000
Investment Securities Available-for-Sale: 12 months or longer, unrealized losses | (21,000) | (20,000)
Investment Securities Available-for-Sale: Total, fair value | 978,000 | 980,000
Investment Securities Available-for-Sale: Total, unrealized losses | (21,000) | (20,000)
Federal agency obligations [Member] |  |
Schedule of Investments [Line Items] |  |
Investment Securities Held-to-Maturity: Less than 12 months, fair value | 5,138,000 | 11,980,000
Investment Securities Held-to-Maturity: 12 months or less, unrealized losses | (22,000) | (34,000)
Investment Securities Held-to-Maturity: Total, fair value | 5,138,000 | 11,980,000
Investment Securities Held-to-Maturity: Total, unrealized losses | $ (22,000) | $ (34,000)

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