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Loans (Narrative) (Details) (USD $) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | Dec. 31, 2012
Debt Instrument [Line Items] |  |  |  |  |
Commercial loans | $ 170,325,000 |  | $ 170,325,000 |  | $ 153,043,000
Percent of participation agreement interest | 80.00% |  | 80.00% |  |
Ownership interest in each loan is participates |  |  | 20.00% |  |
Cash payments of interest | 54,000 | 120,000 | 169,000 | 289,000 |
Aggregate purchase price of loans, maximum |  |  | 45,000,000 |  |
Percent of loans risk rated for capital adequacy |  |  | 100.00% |  |
Allocated specific reserves to modified TDRs | 1,500,000 |  | 1,500,000 |  | 830,000
Total TDR's | 6,600,000 |  | 6,600,000 |  | 7,000,000
Recorded investment | 4,026,000 | 9,235,000 | 4,026,000 | 9,235,000 |
Principal repayment at the date of modification | 50,000 |  | 50,000 |  |
Stated interest rate, minimum |  |  | 3.50% |  |
Stated interest rate, maximum |  |  | 6.50% |  |
Stated interest rate, prior to change maximum | 6.00% |  |  |  |
Stated interest rate, prior to change minimum | 5.50% |  |  |  |
Interest payment impact on income statement |  |  | 5,000 |  |
Stated interest rate, after change | 5.00% |  |  |  |
TDR's term | 5 years |  |  |  |
TDR's amortizing term | 15 years |  |  |  |
TDR's associated reserves | 76,000 |  | 143,000 |  |
Number of days of default payment |  |  | 90 days |  |
Accruing TDR's | 3,933,000 |  | 3,933,000 |  | 3,684,000
Revolving Credit Facility [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Stated interest rate, minimum | 4.75% |  |  |  |
Stated interest rate, maximum | 6.75% |  |  |  |
Commercial Lines Of Credit [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Commercial loans | 13,334,000 |  | 13,334,000 |  | 11,782,000
Home Equity Line of Credit, Other [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Commercial loans | 12,056,000 |  | 12,056,000 |  | 10,447,000
Single-family residential [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Mortgage loans | $ 11,462,000 |  | $ 11,462,000 |  | $ 25,373,000
Stated interest rate, minimum |  |  | 5.00% |  |
Stated interest rate, maximum |  |  | 10.00% |  |
Previous maturity date of Receivables |  |  | 2034 |  |
Maturity date of Receivables |  |  | 2042 |  |
Reduction in stated interest rate of loan |  |  | 30 years |  |

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