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Loans Impaired Loans by Class (Details) (USD $) | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2013 | Jun. 30, 2012 | Jun. 30, 2013 | Jun. 30, 2012 | Dec. 31, 2012
Schedule of Financing Receivables [Line Items] |  |  |  |  |
Recorded Investment | $ 46,331,000 | $ 43,374,000 | $ 46,331,000 | $ 43,374,000 | $ 45,744,000
Unpaid Principal Balance | 50,948,000 | 43,374,000 | 50,948,000 | 43,374,000 | 49,542,000
Related Allowance | 3,006,000 | 4,177,000 | 3,006,000 | 4,177,000 | 3,539,000
Average Recorded Investment | 46,774,000 | 44,170,000 | 47,046,000 | 42,883,000 | 45,019,000
Recognized Interest Income | 388,000 | 270,000 | 784,000 | 422,000 | 1,039,000
With No Related Allowance Recorded [Member] |  |  |  |  |
Schedule of Financing Receivables [Line Items] |  |  |  |  |
Recorded Investment | 33,040,000 | 24,463,000 | 33,040,000 | 24,463,000 | 28,282,000
Unpaid Principal Balance | 36,574,000 | 24,463,000 | 36,574,000 | 24,463,000 | 31,303,000
Related Allowance | 0 | 0 | 0 | 0 | 0
Average Recorded Investment | 31,519,000 | 25,951,000 | 29,998,000 | 25,934,000 | 26,837,000
Recognized Interest Income | 315,000 | 146,000 | 550,000 | 224,000 | 468,000
With an Allowance Recorded [Member] |  |  |  |  |
Schedule of Financing Receivables [Line Items] |  |  |  |  |
Recorded Investment | 13,291,000 | 18,911,000 | 13,291,000 | 18,911,000 | 17,462,000
Unpaid Principal Balance | 14,374,000 | 18,911,000 | 14,374,000 | 18,911,000 | 18,239,000
Related Allowance | 3,006,000 | 4,177,000 | 3,006,000 | 4,177,000 | 3,539,000
Average Recorded Investment | 15,255,000 | 18,219,000 | 17,048,000 | 16,949,000 | 18,182,000
Recognized Interest Income | 73,000 | 124,000 | 234,000 | 198,000 | 571,000
Commercial Real Estate [Member] |  |  |  |  |
Schedule of Financing Receivables [Line Items] |  |  |  |  |
Recorded Investment | 17,332,000 | 13,795,000 | 17,332,000 | 13,795,000 | 15,774,000
Unpaid Principal Balance | 18,470,000 | 13,795,000 | 18,470,000 | 13,795,000 | 16,981,000
Related Allowance | 1,510,000 | 1,133,000 | 1,510,000 | 1,133,000 | 1,523,000
Average Recorded Investment | 17,660,000 | 14,788,000 | 17,309,000 | 13,755,000 | 14,716,000
Recognized Interest Income | 147,000 | 77,000 | 310,000 | 127,000 | 410,000
Commercial Real Estate [Member] | With No Related Allowance Recorded [Member] |  |  |  |  |
Schedule of Financing Receivables [Line Items] |  |  |  |  |
Recorded Investment | 11,452,000 | 10,313,000 | 11,452,000 | 10,313,000 | 9,386,000
Unpaid Principal Balance | 11,851,000 | 10,313,000 | 11,851,000 | 10,313,000 | 9,963,000
Related Allowance | 0 | 0 | 0 | 0 | 0
Average Recorded Investment | 11,083,000 | 11,013,000 | 10,621,000 | 9,729,000 | 10,102,000
Recognized Interest Income | 99,000 | 71,000 | 200,000 | 111,000 | 199,000
Commercial Real Estate [Member] | With an Allowance Recorded [Member] |  |  |  |  |
Schedule of Financing Receivables [Line Items] |  |  |  |  |
Recorded Investment | 5,880,000 | 3,482,000 | 5,880,000 | 3,482,000 | 6,388,000
Unpaid Principal Balance | 6,619,000 | 3,482,000 | 6,619,000 | 3,482,000 | 7,018,000
Related Allowance | 1,510,000 | 1,133,000 | 1,510,000 | 1,133,000 | 1,523,000
Average Recorded Investment | 6,577,000 | 3,775,000 | 6,688,000 | 4,026,000 | 4,614,000
Recognized Interest Income | 48,000 | 6,000 | 110,000 | 16,000 | 211,000
Commercial Real Estate Construction Financing Receivable [Member] |  |  |  |  |
Schedule of Financing Receivables [Line Items] |  |  |  |  |
Recorded Investment | 1,819,000 | 3,619,000 | 1,819,000 | 3,619,000 | 3,354,000
Unpaid Principal Balance | 2,367,000 | 3,619,000 | 2,367,000 | 3,619,000 | 3,368,000
Related Allowance | 266,000 | 787,000 | 266,000 | 787,000 | 969,000
Average Recorded Investment | 2,002,000 | 3,550,000 | 2,507,000 | 3,565,000 | 4,349,000
Recognized Interest Income | 20,000 | 50,000 | 47,000 | 63,000 | 85,000
Commercial Real Estate Construction Financing Receivable [Member] | With No Related Allowance Recorded [Member] |  |  |  |  |
Schedule of Financing Receivables [Line Items] |  |  |  |  |
Recorded Investment | 517,000 | 1,464,000 | 517,000 | 1,464,000 | 101,000
Unpaid Principal Balance | 1,065,000 | 1,464,000 | 1,065,000 | 1,464,000 | 115,000
Related Allowance | 0 | 0 | 0 | 0 | 0
Average Recorded Investment | 376,000 | 1,395,000 | 210,000 | 2,189,000 | 2,533,000
Recognized Interest Income | 27,000 | 13,000 | 28,000 | 26,000 | 0
Commercial Real Estate Construction Financing Receivable [Member] | With an Allowance Recorded [Member] |  |  |  |  |
Schedule of Financing Receivables [Line Items] |  |  |  |  |
Recorded Investment | 1,302,000 | 2,155,000 | 1,302,000 | 2,155,000 | 3,253,000
Unpaid Principal Balance | 1,302,000 | 2,155,000 | 1,302,000 | 2,155,000 | 3,253,000
Related Allowance | 266,000 | 787,000 | 266,000 | 787,000 | 969,000
Average Recorded Investment | 1,626,000 | 2,155,000 | 2,297,000 | 1,376,000 | 1,816,000
Recognized Interest Income | (7,000) | 37,000 | 19,000 | 37,000 | 85,000
Commercial Other [Member] |  |  |  |  |
Schedule of Financing Receivables [Line Items] |  |  |  |  |
Recorded Investment | 5,790,000 | 4,100,000 | 5,790,000 | 4,100,000 | 5,861,000
Unpaid Principal Balance | 6,218,000 | 4,100,000 | 6,218,000 | 4,100,000 | 6,471,000
Related Allowance | 1,005,000 | 932,000 | 1,005,000 | 932,000 | 652,000
Average Recorded Investment | 5,679,000 | 4,241,000 | 5,735,000 | 4,723,000 | 4,851,000
Recognized Interest Income | 34,000 | 34,000 | 70,000 | 34,000 | 91,000
Commercial Other [Member] | With No Related Allowance Recorded [Member] |  |  |  |  |
Schedule of Financing Receivables [Line Items] |  |  |  |  |
Recorded Investment | 4,017,000 | 2,249,000 | 4,017,000 | 2,249,000 | 4,737,000
Unpaid Principal Balance | 4,325,000 | 2,249,000 | 4,325,000 | 2,249,000 | 5,345,000
Related Allowance | 0 | 0 | 0 | 0 | 0
Average Recorded Investment | 3,759,000 | 2,439,000 | 3,726,000 | 2,710,000 | 2,877,000
Recognized Interest Income | 32,000 | 21,000 | 59,000 | 16,000 | 53,000
Commercial Other [Member] | With an Allowance Recorded [Member] |  |  |  |  |
Schedule of Financing Receivables [Line Items] |  |  |  |  |
Recorded Investment | 1,773,000 | 1,851,000 | 1,773,000 | 1,851,000 | 1,124,000
Unpaid Principal Balance | 1,893,000 | 1,851,000 | 1,893,000 | 1,851,000 | 1,126,000
Related Allowance | 1,005,000 | 932,000 | 1,005,000 | 932,000 | 652,000
Average Recorded Investment | 1,920,000 | 1,802,000 | 2,008,000 | 2,013,000 | 1,974,000
Recognized Interest Income | 2,000 | 13,000 | 11,000 | 18,000 | 38,000
Residential Term [Member] |  |  |  |  |
Schedule of Financing Receivables [Line Items] |  |  |  |  |
Recorded Investment | 19,695,000 | 19,052,000 | 19,695,000 | 19,052,000 | 19,444,000
Unpaid Principal Balance | 21,961,000 | 19,052,000 | 21,961,000 | 19,052,000 | 21,282,000
Related Allowance | 218,000 | 966,000 | 218,000 | 966,000 | 395,000
Average Recorded Investment | 19,753,000 | 18,847,000 | 19,822,000 | 18,149,000 | 18,867,000
Recognized Interest Income | 179,000 | 109,000 | 341,000 | 198,000 | 426,000
Residential Term [Member] | With No Related Allowance Recorded [Member] |  |  |  |  |
Schedule of Financing Receivables [Line Items] |  |  |  |  |
Recorded Investment | 15,399,000 | 8,695,000 | 15,399,000 | 8,695,000 | 12,747,000
Unpaid Principal Balance | 17,441,000 | 8,695,000 | 17,441,000 | 8,695,000 | 14,440,000
Related Allowance | 0 | 0 | 0 | 0 | 0
Average Recorded Investment | 14,636,000 | 9,322,000 | 13,862,000 | 9,662,000 | 9,801,000
Recognized Interest Income | 150,000 | 41,000 | 248,000 | 71,000 | 189,000
Residential Term [Member] | With an Allowance Recorded [Member] |  |  |  |  |
Schedule of Financing Receivables [Line Items] |  |  |  |  |
Recorded Investment | 4,296,000 | 10,357,000 | 4,296,000 | 10,357,000 | 6,697,000
Unpaid Principal Balance | 4,520,000 | 10,357,000 | 4,520,000 | 10,357,000 | 6,842,000
Related Allowance | 218,000 | 966,000 | 218,000 | 966,000 | 395,000
Average Recorded Investment | 5,117,000 | 9,525,000 | 5,961,000 | 8,487,000 | 9,066,000
Recognized Interest Income | 29,000 | 68,000 | 93,000 | 127,000 | 237,000
Residential Construction [Member] |  |  |  |  |
Schedule of Financing Receivables [Line Items] |  |  |  |  |
Recorded Investment | 0 | 1,336,000 | 0 | 1,336,000 | 0
Unpaid Principal Balance | 0 | 1,336,000 | 0 | 1,336,000 | 0
Related Allowance | 0 | 48,000 | 0 | 48,000 | 0
Average Recorded Investment | 0 | 1,376,000 | 0 | 1,346,000 | 821,000
Recognized Interest Income | 0 | 0 | 0 | 0 | 0
Residential Construction [Member] | With No Related Allowance Recorded [Member] |  |  |  |  |
Schedule of Financing Receivables [Line Items] |  |  |  |  |
Recorded Investment | 0 | 1,002,000 | 0 | 1,002,000 | 0
Unpaid Principal Balance | 0 | 1,002,000 | 0 | 1,002,000 | 0
Related Allowance | 0 | 0 | 0 | 0 | 0
Average Recorded Investment | 0 | 1,042,000 | 0 | 880,000 | 560,000
Recognized Interest Income | 0 | 0 | 0 | 0 | 0
Residential Construction [Member] | With an Allowance Recorded [Member] |  |  |  |  |
Schedule of Financing Receivables [Line Items] |  |  |  |  |
Recorded Investment | 0 | 334,000 | 0 | 334,000 | 0
Unpaid Principal Balance | 0 | 334,000 | 0 | 334,000 | 0
Related Allowance | 0 | 48,000 | 0 | 48,000 | 0
Average Recorded Investment | 0 | 334,000 | 0 | 466,000 | 261,000
Recognized Interest Income | 0 | 0 | 0 | 0 | 0
Home Equity [Member] |  |  |  |  |
Schedule of Financing Receivables [Line Items] |  |  |  |  |
Recorded Investment | 1,695,000 | 1,456,000 | 1,695,000 | 1,456,000 | 1,311,000
Unpaid Principal Balance | 1,932,000 | 1,456,000 | 1,932,000 | 1,456,000 | 1,440,000
Related Allowance | 7,000 | 300,000 | 7,000 | 300,000 | 0
Average Recorded Investment | 1,680,000 | 1,353,000 | 1,673,000 | 1,324,000 | 1,403,000
Recognized Interest Income | 8,000 | 0 | 16,000 | 0 | 27,000
Home Equity [Member] | With No Related Allowance Recorded [Member] |  |  |  |  |
Schedule of Financing Receivables [Line Items] |  |  |  |  |
Recorded Investment | 1,655,000 | 740,000 | 1,655,000 | 740,000 | 1,311,000
Unpaid Principal Balance | 1,892,000 | 740,000 | 1,892,000 | 740,000 | 1,440,000
Related Allowance | 0 | 0 | 0 | 0 | 0
Average Recorded Investment | 1,665,000 | 740,000 | 1,579,000 | 758,000 | 961,000
Recognized Interest Income | 7,000 | 0 | 15,000 | 0 | 27,000
Home Equity [Member] | With an Allowance Recorded [Member] |  |  |  |  |
Schedule of Financing Receivables [Line Items] |  |  |  |  |
Recorded Investment | 40,000 | 716,000 | 40,000 | 716,000 | 0
Unpaid Principal Balance | 40,000 | 716,000 | 40,000 | 716,000 | 0
Related Allowance | 7,000 | 300,000 | 7,000 | 300,000 | 0
Average Recorded Investment | 15,000 | 613,000 | 94,000 | 566,000 | 442,000
Recognized Interest Income | 1,000 | 0 | 1,000 | 0 | 0
Consumer Loan [Member] |  |  |  |  |
Schedule of Financing Receivables [Line Items] |  |  |  |  |
Recorded Investment | 0 | 16,000 | 0 | 16,000 | 0
Unpaid Principal Balance | 0 | 16,000 | 0 | 16,000 | 0
Related Allowance | 0 | 11,000 | 0 | 11,000 | 0
Average Recorded Investment | 0 | 15,000 | 0 | 21,000 | 12,000
Recognized Interest Income | 0 | 0 | 0 | 0 | 0
Consumer Loan [Member] | With No Related Allowance Recorded [Member] |  |  |  |  |
Schedule of Financing Receivables [Line Items] |  |  |  |  |
Recorded Investment | 0 | 0 | 0 | 0 | 0
Unpaid Principal Balance | 0 | 0 | 0 | 0 | 0
Related Allowance | 0 | 0 | 0 | 0 | 0
Average Recorded Investment | 0 | 0 | 0 | 6,000 | 3,000
Recognized Interest Income | 0 | 0 | 0 | 0 | 0
Consumer Loan [Member] | With an Allowance Recorded [Member] |  |  |  |  |
Schedule of Financing Receivables [Line Items] |  |  |  |  |
Recorded Investment | 0 | 16,000 | 0 | 16,000 | 0
Unpaid Principal Balance | 0 | 16,000 | 0 | 16,000 | 0
Related Allowance | 0 | 11,000 | 0 | 11,000 | 0
Average Recorded Investment | 0 | 15,000 | 0 | 15,000 | 9,000
Recognized Interest Income | $ 0 | $ 0 | $ 0 | $ 0 | $ 0

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