Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2012

Benefit Plans [Abstract]

Schedule of Net Funded Status [Table Text Block]

	December 31
(Dollars in thousands)	2012		2011
Projected benefit obligation	$	(7,221)	$	(6,777)
Accumulated benefit obligation		(7,221)		(6,777)
Fair value of plan assets		5,283		5,040
Amounts recognized in the statement of financial position consist of:
Liabilities	$	(1,938)	$	(1,737)
Funded status	$	(1,938)	$	(1,737)
Amounts recognized in accumulated other comprehensive income (loss) consist of:
Net loss	$	2,233	$	2,131
Total	$	2,233	$	2,131

Schedule of Benefit Obligations in Excess of Fair Value of Plan Assets [Table Text Block]

	Year ended December 31
(Dollars in thousands)	2012		2011
Change in benefit obligation
Benefit obligation at beginning of year	$	6,777	$	6,629
Interest cost		276		346
Actuarial loss		687		514
Benefits paid		(563)		(771)
Service cost		44		59
Benefit obligation at end of year	$	7,221	$	6,777
Change in plan assets
Fair value of assets at beginning of year	$	5,040	$	5,696
Actual return on plan assets		772		(48)
Employer contribution		90		163
Benefits paid		(563)		(771)
Estimated expenses		(56)		-
Fair value of assets at end of year	$	5,283	$	5,040

Schedule of Allocation of Plan Assets [Table Text Block]

	December 31
	2012	2011
Cash and cash equivalents	15.2%	4.2%
Equity securities	22.0	44.2
Fixed income securities	62.8	51.6
Total	100.0%	100.0%

Schedule of Costs of Retirement Plans [Table Text Block]

	Year Ended December 31
(Dollars in thousands)	2012		2011
Service cost	$	44	$	59
Interest cost		276		346
Expected return on plan assets		(267)		(309)
Recognized net actuarial loss		134		56
Net periodic cost	$	187	$	152
Assumptions used:
Discount rate		3.60%		4.25%
Rate of increase in compensation level		N/A		N/A
Expected long-term rate of return on assets		5.5		5.5

Schedule of Expected Benefit Payments [Table Text Block]

(Dollars in thousands)	Period		Benefits
	2013	$	334
	2014		383
	2015		566
	2016		300
	2017		303
	2018-2022		2,878

Fair Value of Plan Assets by Asset Categories [Table Text Block]

The fair value of DNB’s pension plan assets by asset category are as follows:

	December 31, 2012
							Assets at
							Fair
(Dollars in thousands)	Level 1		Level 2		Level 3		Value
Mutual fund — equity
US equities	$	431	$	-	$	-	$	431
International equities		648		-		-		648
Real estate		84		-		-		84
Mutual funds — fixed income
Domestic fixed income		1,537		-		-		1,537
US corporate bonds, notes and cash
Corporate bonds		-		1,779		-		1,779
Cash		804		-		-		804
Total assets measured at fair value on a recurring basis	$	3,504	$	1,779	$	-	$	5,283

	December 31, 2011
							Assets at
							Fair
(Dollars in thousands)	Level 1		Level 2		Level 3		Value
Mutual fund — equity
US equities	$	1,217	$	-	$	-	$	1,217
International equities		812		-		-		812
Real estate		201		-		-		201
Mutual funds — fixed income
Domestic fixed income		577		-		-		577
US corporate bonds, notes and cash
Corporate bonds		-		2,023		-		2,023
Cash		210		-		-		210
Total assets measured at fair value on a recurring basis	$	3,017	$	2,023	$	-	$	5,040

Stock Option Activity [Table Text Block]

	Number	Weighted Average
	Outstanding	Exercise Price
Outstanding January 1, 2011	203,575	$	16.96
Issued	44,600		10.31
Exercised	-		-
Forfeited	(2,323)		12.95
Expired	(9,414)		11.16
Outstanding December 31, 2011	236,438	$	15.98
Issued	-		-
Exercised	-		-
Forfeited	(2,605)		9.69
Expired	(19,215)		16.83
Outstanding December 31, 2012	214,618	$	15.98

Weighted Average Price and Weighted Average Remaining Contractual Life [Table Text Block]

December 31, 2012
Range of			Weighted Average
Exercise	Number	Number	Exercise		Remaining			Intrinsic
Prices	Outstanding	Exercisable	Price		Contractual Life			Value
$ 6.93-10.99	86,050	-	$	8.67	5.16	years	$	588,000
14.00-19.99	61,715	61,715		17.62	2.72	years		-
20.00-22.99	18,812	18,812		22.78	1.97	years		-
23.00-24.27	48,041	48,041		24.27	2.29	years		-
Total	214,618	128,568	$	15.98	3.54	years	$	588,000

December 31, 2011
Range of			Weighted Average
Exercise	Number	Number	Exercise		Remaining			Intrinsic
Prices	Outstanding	Exercisable	Price		Contractual Life			Value
$ 6.93-13.99	88,200	-	$	8.64	6.14	years	$	180,002
14.00-19.99	81,096	81,096		17.44	2.96	years		-
20.00-22.99	19,101	19,101		22.78	2.98	years		-
23.00-24.27	48,041	48,041		24.27	3.3	years		-
Total	236,438	148,238	$	15.98	4.22	years	$	180,002

Stock Grant Activity [Table Text Block]

		Weighted Average
	Shares	Stock Price
Non-vested stock awards — January 1, 2011	22,750	$	7.91
Granted	15,000		10.31
Forfeited	(4)		9.55
Vested	(8,546)		9.55
Non-vested stock awards — December 31, 2011	29,200	$	8.67
Granted	19,070		15.56
Forfeited	-		-
Vested	-		-
Non-vested stock awards — December 31, 2012	48,270	$	11.39