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Junior Subordinated Debentures (Narrative) (Details) (USD $)
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6 Months Ended |
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Jun. 30, 2012
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DNB Capital Trust I [Member]
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| Debt Instrument [Line Items] | |
| Issuance date | Jul. 20, 2001 |
| Floating rate capital preferred securities | $ 5,000,000 |
| Description of variable rate basis | 6 month Libor plus 3.75%, with a cap of 12% |
| Maximum stated interest rate range | 12.00% |
| Principal amount, floating rate junior subordinated debentures | 5,155,000 |
| Maturity date range, start | Jul. 25, 2006 |
| Maturity date range, end | Jul. 25, 1931 |
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DNB Capital Trust II [Member]
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| Debt Instrument [Line Items] | |
| Issuance date | Mar. 30, 2005 |
| Floating rate capital preferred securities | 4,000,000 |
| Description of variable rate basis | the rate was fixed at 6.56% for the first 5 years and is now adjusting at a rate of 3-month LIBOR plus 1.77% |
| Principal amount, floating rate junior subordinated debentures | $ 4,100,000 |
| Maturity date range, start | May 23, 2010 |
| Maturity date range, end | May 23, 1935 |