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Loans Impaired Loans by Class (Details) (USD $) | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | Dec. 31, 2012
Schedule of Financing Receivables [Line Items] |  |  |  |  |
Recorded Investment | $ 44,076,000 | $ 48,645,000 | $ 44,076,000 | $ 48,645,000 | $ 45,744,000
Unpaid Principal Balance | 48,188,000 | 50,808,000 | 48,188,000 | 50,808,000 | 49,542,000
Related Allowance | 2,845,000 | 5,062,000 | 2,845,000 | 5,062,000 | 3,539,000
Average Recorded Investment | 45,354,000 | 45,947,000 | 46,476,000 | 43,905,000 | 45,019,000
Recognized Interest Income | 476,000 | 288,000 | 1,235,000 | 710,000 | 1,039,000
With No Related Allowance Recorded [Member] |  |  |  |  |
Schedule of Financing Receivables [Line Items] |  |  |  |  |
Recorded Investment | 33,274,000 | 26,592,000 | 33,274,000 | 26,592,000 | 28,282,000
Unpaid Principal Balance | 36,612,000 | 28,313,000 | 36,612,000 | 28,313,000 | 31,303,000
Related Allowance | 0 | 0 | 0 | 0 | 0
Average Recorded Investment | 32,982,000 | 26,105,000 | 31,004,000 | 25,991,000 | 26,837,000
Recognized Interest Income | 407,000 | 82,000 | 932,000 | 306,000 | 468,000
With an Allowance Recorded [Member] |  |  |  |  |
Schedule of Financing Receivables [Line Items] |  |  |  |  |
Recorded Investment | 10,802,000 | 22,053,000 | 10,802,000 | 22,053,000 | 17,462,000
Unpaid Principal Balance | 11,576,000 | 22,495,000 | 11,576,000 | 22,495,000 | 18,239,000
Related Allowance | 2,845,000 | 5,062,000 | 2,845,000 | 5,062,000 | 3,539,000
Average Recorded Investment | 12,372,000 | 19,842,000 | 15,472,000 | 17,914,000 | 18,182,000
Recognized Interest Income | 69,000 | 206,000 | 303,000 | 404,000 | 571,000
Commercial Real Estate [Member] |  |  |  |  |
Schedule of Financing Receivables [Line Items] |  |  |  |  |
Recorded Investment | 16,970,000 | 16,321,000 | 16,970,000 | 16,321,000 | 15,774,000
Unpaid Principal Balance | 18,153,000 | 17,274,000 | 18,153,000 | 17,274,000 | 16,981,000
Related Allowance | 1,535,000 | 1,416,000 | 1,535,000 | 1,416,000 | 1,523,000
Average Recorded Investment | 17,104,000 | 15,376,000 | 17,240,000 | 14,296,000 | 14,716,000
Recognized Interest Income | 195,000 | 120,000 | 505,000 | 247,000 | 410,000
Commercial Real Estate [Member] | With No Related Allowance Recorded [Member] |  |  |  |  |
Schedule of Financing Receivables [Line Items] |  |  |  |  |
Recorded Investment | 11,848,000 | 10,142,000 | 11,848,000 | 10,142,000 | 9,386,000
Unpaid Principal Balance | 12,509,000 | 10,858,000 | 12,509,000 | 10,858,000 | 9,963,000
Related Allowance | 0 | 0 | 0 | 0 | 0
Average Recorded Investment | 11,487,000 | 11,257,000 | 10,913,000 | 10,238,000 | 10,102,000
Recognized Interest Income | 151,000 | 23,000 | 351,000 | 134,000 | 199,000
Commercial Real Estate [Member] | With an Allowance Recorded [Member] |  |  |  |  |
Schedule of Financing Receivables [Line Items] |  |  |  |  |
Recorded Investment | 5,122,000 | 6,179,000 | 5,122,000 | 6,179,000 | 6,388,000
Unpaid Principal Balance | 5,644,000 | 6,416,000 | 5,644,000 | 6,416,000 | 7,018,000
Related Allowance | 1,535,000 | 1,416,000 | 1,535,000 | 1,416,000 | 1,523,000
Average Recorded Investment | 5,617,000 | 4,119,000 | 6,327,000 | 4,058,000 | 4,614,000
Recognized Interest Income | 44,000 | 97,000 | 154,000 | 113,000 | 211,000
Commercial Real Estate Construction Financing Receivable [Member] |  |  |  |  |
Schedule of Financing Receivables [Line Items] |  |  |  |  |
Recorded Investment | 1,364,000 | 6,645,000 | 1,364,000 | 6,645,000 | 3,354,000
Unpaid Principal Balance | 1,381,000 | 6,645,000 | 1,381,000 | 6,645,000 | 3,368,000
Related Allowance | 269,000 | 696,000 | 269,000 | 696,000 | 969,000
Average Recorded Investment | 1,676,000 | 4,664,000 | 2,227,000 | 3,932,000 | 4,349,000
Recognized Interest Income | 14,000 | 32,000 | 36,000 | 95,000 | 85,000
Commercial Real Estate Construction Financing Receivable [Member] | With No Related Allowance Recorded [Member] |  |  |  |  |
Schedule of Financing Receivables [Line Items] |  |  |  |  |
Recorded Investment | 62,000 | 4,694,000 | 62,000 | 4,694,000 | 101,000
Unpaid Principal Balance | 79,000 | 4,694,000 | 79,000 | 4,694,000 | 115,000
Related Allowance | 0 | 0 | 0 | 0 | 0
Average Recorded Investment | 364,000 | 2,578,000 | 262,000 | 2,319,000 | 2,533,000
Recognized Interest Income | 1,000 | 8,000 | 4,000 | 34,000 | 0
Commercial Real Estate Construction Financing Receivable [Member] | With an Allowance Recorded [Member] |  |  |  |  |
Schedule of Financing Receivables [Line Items] |  |  |  |  |
Recorded Investment | 1,302,000 | 1,951,000 | 1,302,000 | 1,951,000 | 3,253,000
Unpaid Principal Balance | 1,302,000 | 1,951,000 | 1,302,000 | 1,951,000 | 3,253,000
Related Allowance | 269,000 | 696,000 | 269,000 | 696,000 | 969,000
Average Recorded Investment | 1,312,000 | 2,086,000 | 1,965,000 | 1,613,000 | 1,816,000
Recognized Interest Income | 13,000 | 24,000 | 32,000 | 61,000 | 85,000
Commercial Other [Member] |  |  |  |  |
Schedule of Financing Receivables [Line Items] |  |  |  |  |
Recorded Investment | 4,926,000 | 4,905,000 | 4,926,000 | 4,905,000 | 5,861,000
Unpaid Principal Balance | 5,379,000 | 5,116,000 | 5,379,000 | 5,116,000 | 6,471,000
Related Allowance | 807,000 | 1,240,000 | 807,000 | 1,240,000 | 652,000
Average Recorded Investment | 5,441,000 | 4,513,000 | 5,636,000 | 4,653,000 | 4,851,000
Recognized Interest Income | 109,000 | 16,000 | 179,000 | 50,000 | 91,000
Commercial Other [Member] | With No Related Allowance Recorded [Member] |  |  |  |  |
Schedule of Financing Receivables [Line Items] |  |  |  |  |
Recorded Investment | 3,939,000 | 2,362,000 | 3,939,000 | 2,362,000 | 4,737,000
Unpaid Principal Balance | 4,282,000 | 2,543,000 | 4,282,000 | 2,543,000 | 5,345,000
Related Allowance | 0 | 0 | 0 | 0 | 0
Average Recorded Investment | 3,923,000 | 2,223,000 | 3,793,000 | 2,548,000 | 2,877,000
Recognized Interest Income | 109,000 | 6,000 | 168,000 | 22,000 | 53,000
Commercial Other [Member] | With an Allowance Recorded [Member] |  |  |  |  |
Schedule of Financing Receivables [Line Items] |  |  |  |  |
Recorded Investment | 987,000 | 2,543,000 | 987,000 | 2,543,000 | 1,124,000
Unpaid Principal Balance | 1,097,000 | 2,573,000 | 1,097,000 | 2,573,000 | 1,126,000
Related Allowance | 807,000 | 1,240,000 | 807,000 | 1,240,000 | 652,000
Average Recorded Investment | 1,518,000 | 2,290,000 | 1,843,000 | 2,105,000 | 1,974,000
Recognized Interest Income | 0 | 10,000 | 11,000 | 28,000 | 38,000
Residential Term [Member] |  |  |  |  |
Schedule of Financing Receivables [Line Items] |  |  |  |  |
Recorded Investment | 19,138,000 | 19,305,000 | 19,138,000 | 19,305,000 | 19,444,000
Unpaid Principal Balance | 21,381,000 | 19,936,000 | 21,381,000 | 19,936,000 | 21,282,000
Related Allowance | 228,000 | 1,494,000 | 228,000 | 1,494,000 | 395,000
Average Recorded Investment | 19,448,000 | 19,149,000 | 19,696,000 | 18,482,000 | 18,867,000
Recognized Interest Income | 149,000 | 106,000 | 490,000 | 304,000 | 426,000
Residential Term [Member] | With No Related Allowance Recorded [Member] |  |  |  |  |
Schedule of Financing Receivables [Line Items] |  |  |  |  |
Recorded Investment | 15,787,000 | 8,414,000 | 15,787,000 | 8,414,000 | 12,747,000
Unpaid Principal Balance | 17,888,000 | 8,870,000 | 17,888,000 | 8,870,000 | 14,440,000
Related Allowance | 0 | 0 | 0 | 0 | 0
Average Recorded Investment | 15,564,000 | 8,477,000 | 14,435,000 | 9,267,000 | 9,801,000
Recognized Interest Income | 137,000 | 31,000 | 385,000 | 102,000 | 189,000
Residential Term [Member] | With an Allowance Recorded [Member] |  |  |  |  |
Schedule of Financing Receivables [Line Items] |  |  |  |  |
Recorded Investment | 3,351,000 | 10,891,000 | 3,351,000 | 10,891,000 | 6,697,000
Unpaid Principal Balance | 3,493,000 | 11,066,000 | 3,493,000 | 11,066,000 | 6,842,000
Related Allowance | 228,000 | 1,494,000 | 228,000 | 1,494,000 | 395,000
Average Recorded Investment | 3,884,000 | 10,672,000 | 5,261,000 | 9,215,000 | 9,066,000
Recognized Interest Income | 12,000 | 75,000 | 105,000 | 202,000 | 237,000
Residential Construction [Member] |  |  |  |  |
Schedule of Financing Receivables [Line Items] |  |  |  |  |
Recorded Investment | 0 | 23,000 | 0 | 23,000 | 0
Unpaid Principal Balance | 0 | 272,000 | 0 | 272,000 | 0
Related Allowance | 0 | 0 | 0 | 0 | 0
Average Recorded Investment | 0 | 592,000 | 0 | 1,095,000 | 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 | 23,000 | 0 | 23,000 | 0
Unpaid Principal Balance | 0 | 272,000 | 0 | 272,000 | 0
Related Allowance | 0 | 0 | 0 | 0 | 0
Average Recorded Investment | 0 | 481,000 | 0 | 747,000 | 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 | 0 | 0 | 0 | 0
Unpaid Principal Balance | 0 | 0 | 0 | 0 | 0
Related Allowance | 0 | 0 | 0 | 0 | 0
Average Recorded Investment | 0 | 111,000 | 0 | 348,000 | 261,000
Recognized Interest Income | 0 | 0 | 0 | 0 | 0
Home Equity [Member] |  |  |  |  |
Schedule of Financing Receivables [Line Items] |  |  |  |  |
Recorded Investment | 1,678,000 | 1,445,000 | 1,678,000 | 1,445,000 | 1,311,000
Unpaid Principal Balance | 1,894,000 | 1,564,000 | 1,894,000 | 1,564,000 | 1,440,000
Related Allowance | 6,000 | 215,000 | 6,000 | 215,000 | 0
Average Recorded Investment | 1,685,000 | 1,647,000 | 1,677,000 | 1,431,000 | 1,403,000
Recognized Interest Income | 9,000 | 14,000 | 25,000 | 14,000 | 27,000
Home Equity [Member] | With No Related Allowance Recorded [Member] |  |  |  |  |
Schedule of Financing Receivables [Line Items] |  |  |  |  |
Recorded Investment | 1,638,000 | 957,000 | 1,638,000 | 957,000 | 1,311,000
Unpaid Principal Balance | 1,854,000 | 1,076,000 | 1,854,000 | 1,076,000 | 1,440,000
Related Allowance | 0 | 0 | 0 | 0 | 0
Average Recorded Investment | 1,644,000 | 1,089,000 | 1,601,000 | 868,000 | 961,000
Recognized Interest Income | 9,000 | 14,000 | 24,000 | 14,000 | 27,000
Home Equity [Member] | With an Allowance Recorded [Member] |  |  |  |  |
Schedule of Financing Receivables [Line Items] |  |  |  |  |
Recorded Investment | 40,000 | 488,000 | 40,000 | 488,000 | 0
Unpaid Principal Balance | 40,000 | 488,000 | 40,000 | 488,000 | 0
Related Allowance | 6,000 | 215,000 | 6,000 | 215,000 | 0
Average Recorded Investment | 41,000 | 558,000 | 76,000 | 563,000 | 442,000
Recognized Interest Income | 0 | 0 | 1,000 | 0 | 0
Consumer Loan [Member] |  |  |  |  |
Schedule of Financing Receivables [Line Items] |  |  |  |  |
Recorded Investment | 0 | 1,000 | 0 | 1,000 | 0
Unpaid Principal Balance | 0 | 1,000 | 0 | 1,000 | 0
Related Allowance | 0 | 1,000 | 0 | 1,000 | 0
Average Recorded Investment | 0 | 6,000 | 0 | 16,000 | 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 | 4,000 | 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 | 1,000 | 0 | 1,000 | 0
Unpaid Principal Balance | 0 | 1,000 | 0 | 1,000 | 0
Related Allowance | 0 | 1,000 | 0 | 1,000 | 0
Average Recorded Investment | 0 | 6,000 | 0 | 12,000 | 9,000
Recognized Interest Income | $ 0 | $ 0 | $ 0 | $ 0 | $ 0

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