Borrowings and Subordinated Debentures (Details) (USD $)	9 Months Ended
	Sep. 30, 2013 Affiliate	Dec. 31, 2012
Advances from the Federal Home Loan Bank [Abstract]
Percentage of over collateralized delivery requirement with federal home loan bank (in hundredths)	105.00%
Line of credit with federal home loan bank, amount	$ 150,000,000
Federal Home Loan Bank, advances, general debt obligations, disclosures, collateral pledged	74,300,000
Federal Home Loan Bank, advances, general debt obligations, disclosures, collateral pledged book value	28,900,000
Amount [Abstract]
Advances maturing in 2013	14,000,000	50,000,000
Advances maturing in 2015	10,000,000	0
Advances maturing in 2016	10,000,000	0
Advances maturing in 2017	25,000,000	15,000,000
Advances maturing in 2018	10,000,000	0
Total FHLB borrowings	69,000,000	65,000,000
Rate [Abstract]
Advances maturing in 2013 (in hundredths)	0.23%	2.64%
Advances maturing in 2015 (in hundredths)	0.71%	0.00%
Advances maturing in 2016 (in hundredths)	1.11%	0.00%
Advances maturing in 2017 (in hundredths)	1.46%	1.39%
Advances maturing in 2018 (in hundredths)	2.01%	0.00%
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Number of Delaware trust affiliates	2
Interest payments in arrears on trust preferred securities	3,100,000
Interest penalty on trust preferred securities	174,000
Trust Preferred Securities [Member]
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Aggregate principal amount	25,000,000
Description of variable rate basis	3-month LIBOR
Interest penalty on trust preferred securities	174,000
Trust Preferred Securities [Member] | Trust I [Member]
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Aggregate principal amount	12,500,000
Junior subordinated debenture owed to unconsolidated subsidiary trust	12,900,000
Debt securities interest rate (in hundredths)	2.40%
Trust Preferred Securities basis spread on variable rate (in hundredths)	2.15%
Trust Preferred Securities [Member] | Trust II [Member]
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Aggregate principal amount	12,500,000
Junior subordinated debenture owed to unconsolidated subsidiary trust	12,900,000
Debt securities interest rate (in hundredths)	2.40%
Trust Preferred Securities basis spread on variable rate (in hundredths)	2.15%
Common Securities [Member] | Trust I [Member]
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Aggregate principal amount	387,000
Common Securities [Member] | Trust II [Member]
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Aggregate principal amount	387,000
PNC Bank [Member]
Other borrowings [Abstract]
Notes payable with PNC Bank	3,000,000	3,300,000
Description of variable rate basis on notes payable	one month LIBOR
Basis spread on variable rate on notes payable (in hundredths)	0.15%
Interest rate on notes payable (in hundredths)	0.33%
Other borrowings from PNC Bank outstanding	$ 40,000,000	$ 40,000,000
Weighted average interest rate on other borrowings from PNC Bank (in hundredths)	3.65%	3.65%
PNC Bank [Member] | Notes payable [Member]
Other borrowings [Abstract]
Maturity date of borrowings from PNC Bank	Aug. 25, 2016
PNC Bank [Member] | Other Borrowings [Member]
Other borrowings [Abstract]
Maturity date of borrowings from PNC Bank	Jan. 07, 2018