Regulatory Matters (Schedule of Compliance with Regulatory Capital Requirements) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Capital	$ 71,775	$ 66,716
Capital to Risk Weighted Assets	15.88%	15.57%
Capital Required for Capital Adequacy	36,153	34,275
Capital Required for Capital Adequacy to Risk Weighted Assets	8.00%	8.00%
Tier One Risk Based Capital	66,115	61,354
Tier One Risk Based Capital to Risk Weighted Assets	14.63%	14.32%
Tier One Risk Based Capital Required for Capital Adequacy	18,076	17,138
Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets	4.00%	4.00%
Tier One Leverage Capital	66,115	61,354
Tier One Leverage Capital to Average Assets	10.50%	10.14%
Tier One Leverage Capital Required for Capital Adequacy	25,189	24,205
Tier One Leverage Capital Required for Capital Adequacy to Average Assets	4.00%	4.00%
DNB First, N.A. [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Capital	71,737	66,692
Capital to Risk Weighted Assets	15.89%	15.58%
Capital Required for Capital Adequacy	36,119	34,242
Capital Required for Capital Adequacy to Risk Weighted Assets	8.00%	8.00%
Capital Required to be Well Capitalized	45,149	42,803
Capital Required to be Well Capitalized to Risk Weighted Assets	10.00%	10.00%
Tier One Risk Based Capital	66,077	61,330
Tier One Risk Based Capital to Risk Weighted Assets	14.64%	14.33%
Tier One Risk Based Capital Required for Capital Adequacy	18,060	17,121
Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets	4.00%	4.00%
Tier One Risk Based Capital Required to be Well Capitalized	27,090	25,682
Tier One Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets	6.00%	6.00%
Tier One Leverage Capital	66,077	61,330
Tier One Leverage Capital to Average Assets	10.53%	10.14%
Tier One Leverage Capital Required for Capital Adequacy	25,110	24,188
Tier One Leverage Capital Required for Capital Adequacy to Average Assets	4.00%	4.00%
Tier One Leverage Capital Required to be Well Capitalized	$ 31,387	$ 30,235
Tier One Leverage Capital Required to be Well Capitalized to Average Assets	5.00%	5.00%