Regulatory Matters (Schedule of Actual Capital Amounts and Ratios) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total risk-based capital, amount	$ 105,669	$ 81,321
Total risk-based capital, ratio	12.50%	14.78%
Total risk-based capital for capital adequacy purposes, amount	$ 72,924	$ 44,003
Total risk-based capital for capital adequacy purposes, ratio	8.625%	8.00%
Common equity tier 1 capital, amount	$ 81,201	$ 57,448
Common equity tier 1 capital, ratio	9.60%	10.44%
Common equity tier 1 capital for capital adequacy purposes, amount	$ 43,332	$ 24,752
Common equity tier 1 capital for capital adequacy purposes, ratio	5.125%	4.50%
Tier 1 risk-based capital, amount	$ 90,201	$ 66,448
Tier 1 risk-based capital, ratio	10.67%	12.08%
Tier 1 risk-based capital required for capital adequacy, amount	$ 56,014	$ 33,002
Tier 1 risk-based capital required for capital adequacy, ratio	6.625%	6.00%
Tier 1 ( leverage) capital, amount	$ 90,201	$ 66,448
Tier 1 ( leverage) capital, ratio	8.42%	8.94%
Tier 1 ( leverage) capital required for capital adequacy, amount	$ 42,864	$ 29,717
Tier 1 ( leverage) capital required for capital adequacy, ratio	4.00%	4.00%
DNB First, N.A. [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total risk-based capital, amount	$ 103,094	$ 80,286
Total risk-based capital, ratio	12.22%	14.63%
Total risk-based capital for capital adequacy purposes, amount	$ 72,785	$ 43,904
Total risk-based capital for capital adequacy purposes, ratio	8.625%	8.00%
Total risk-based capital required to be well capitalized, amount	$ 84,388	$ 68,600
Total risk-based capital required to be well capitalized, ratio	10.00%	12.50%
Common equity tier 1 capital, amount	$ 97,376	$ 75,163
Common equity tier 1 capital, ratio	11.54%	13.70%
Common equity tier 1 capital for capital adequacy purposes, amount	$ 43,249	$ 24,696
Common equity tier 1 capital for capital adequacy purposes, ratio	5.125%	4.50%
Common equity tier 1 capital to be well capitalized, amount	$ 54,852	$ 49,392
Common equity tier 1 capital to be well capitalized, ratio	6.50%	9.00%
Tier 1 risk-based capital, amount	$ 97,376	$ 75,163
Tier 1 risk-based capital, ratio	11.54%	13.70%
Tier 1 risk-based capital required for capital adequacy, amount	$ 55,907	$ 32,928
Tier 1 risk-based capital required for capital adequacy, ratio	6.625%	6.00%
Tier 1 risk-based capital required to be well capitalized, amount	$ 67,511	$ 57,624
Tier 1 risk-based capital required to be well capitalized, ratio	8.00%	10.50%
Tier 1 ( leverage) capital, amount	$ 97,376	$ 75,163
Tier 1 ( leverage) capital, ratio	9.09%	10.13%
Tier 1 ( leverage) capital required for capital adequacy, amount	$ 42,830	$ 29,670
Tier 1 ( leverage) capital required for capital adequacy, ratio	4.00%	4.00%
Tier 1 ( leverage) capital required to be well capitalized, amount	$ 53,537	$ 37,087
Tier 1 ( leverage) capital required to be well capitalized, ratio	5.00%	5.00%