Consolidated Statements of Income (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013
Interest and Dividend Income:
Interest and fees on loans and leases	$ 19,588	$ 19,183
Interest and dividends on investment securities: Taxable	2,850us-gaap_InterestIncomeSecuritiesTaxable	2,861us-gaap_InterestIncomeSecuritiesTaxable
Interest and dividends on investment securities: Exempt from federal taxes	1,116	1,098
Interest on cash and cash equivalents	42	70
Total interest and dividend income	23,596	23,212
Interest Expense:
Interest on NOW, money market and savings	541	740
Interest on time deposits	697us-gaap_InterestExpenseTimeDeposits	1,071us-gaap_InterestExpenseTimeDeposits
Interest in brokered deposits	53
Interest on FHLB advances	613	653
Interest on repurchase agreements	39	45
Interest on junior subordinated debentures	295	303
Interest on other borrowings	73	76
Total interest expense	2,311us-gaap_InterestExpense	2,888us-gaap_InterestExpense
Net interest income	21,285us-gaap_InterestIncomeExpenseNet	20,324us-gaap_InterestIncomeExpenseNet
Provision for credit losses	1,130	2,530
Net interest income after provision for credit losses	20,155	17,794
Non-interest Income:
Service charges	1,226	1,307
Wealth management	1,314us-gaap_AssetManagementFees1	1,247us-gaap_AssetManagementFees1
Mortgage banking	92
Increase in cash surrender value of BOLI	235us-gaap_BankOwnedLifeInsuranceIncome	238us-gaap_BankOwnedLifeInsuranceIncome
Gains on sale of investment securities, net	858us-gaap_GainLossOnSaleOfSecuritiesNet	610us-gaap_GainLossOnSaleOfSecuritiesNet
Gain on sale of loans		162us-gaap_GainLossOnSalesOfLoansNet
Other fees	1,233us-gaap_FeesAndCommissionsOther	1,231us-gaap_FeesAndCommissionsOther
Total non-interest income	4,958us-gaap_NoninterestIncome	4,795us-gaap_NoninterestIncome
Non-interest Expense:
Salaries and employee benefits	9,998us-gaap_LaborAndRelatedExpense	9,437us-gaap_LaborAndRelatedExpense
Furniture and equipment	1,289us-gaap_EquipmentExpense	1,143us-gaap_EquipmentExpense
Occupancy	2,119us-gaap_OccupancyNet	2,011us-gaap_OccupancyNet
Professional and consulting	1,216us-gaap_ProfessionalFees	1,163us-gaap_ProfessionalFees
Advertising and marketing	662us-gaap_MarketingAndAdvertisingExpense	642us-gaap_MarketingAndAdvertisingExpense
Printing and supplies	165us-gaap_SuppliesAndPostageExpense	149us-gaap_SuppliesAndPostageExpense
FDIC insurance	455	512
PA shares tax	602dnbf_PaSharesTax	620dnbf_PaSharesTax
Telecommunications	252dnbf_TelephoneAndFax	231dnbf_TelephoneAndFax
Loss (gain) on sale or write down of OREO	7	(106)
Other expenses	1,867us-gaap_OtherNoninterestExpense	1,648us-gaap_OtherNoninterestExpense
Total non-interest expense	18,632us-gaap_NoninterestExpense	17,450us-gaap_NoninterestExpense
Income before income tax expense	6,481	5,139
Income tax expense	1,677us-gaap_IncomeTaxExpenseBenefit	1,220us-gaap_IncomeTaxExpenseBenefit
Net income	4,804us-gaap_NetIncomeLoss	3,919us-gaap_NetIncomeLoss
Preferred stock dividends	135	148
Net income available to Common Shareholders	$ 4,669	$ 3,771
Earnings per common share:
Basic	$ 1.69us-gaap_EarningsPerShareBasic	$ 1.38us-gaap_EarningsPerShareBasic
Diluted	$ 1.66us-gaap_EarningsPerShareDiluted	$ 1.36us-gaap_EarningsPerShareDiluted
Cash dividends per common share	$ 0.28	$ 0.28
Weighted average common shares outstanding:
Basic	2,766,723	2,742,417
Diluted	2,812,726	2,780,752

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