Borrowings and Subordinated Debentures (Details) (USD $)	6 Months Ended
	Jun. 30, 2012	Dec. 31, 2011
Advances from Federal Home Loan Banks [Abstract]
Line of credit with federal home loan bank, amount	$ 150,000,000
Outstanding line of credit with federal home loan bank, amount	15,000,000	54,218,000
Percentage of collateralized delivery requirement with federal home loan bank (in hundredths)	105.00%
Amount [Abstract]
Advances maturing in 2012	15,000,000	52,000,000
Advances maturing in 2013	50,000,000	50,000,000
Advances maturing in 2017	15,000,000	0
Amortizing advance, due April 2012,requiring monthly principal and interest of $558,400	0	2,218,000
Total FHLB borrowings	80,000,000	104,218,000
Rate [Abstract]
Advances maturing in 2012 (in hundredths)	0.25%	2.64%
Advances maturing in 2013 (in hundredths)	2.64%	2.64%
Advances maturing in 2017 (in hundredths)	1.39%	0.00%
Amortizing advance, due April 2012,requiring monthly principal and interest of $558,400 (in hundredths)		3.46%
Other borrowings [Abstract]
Notes Payable with PNC Bank	3,600,000	3,800,000
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Aggregate principal amount	25,000,000
Junior Subordinated Debenture Owed to Unconsolidated Subsidiary Trust, Total	25,774,000
Debt securities interest rate (in hundredths)	2.62%
Debt Instrument Description Of Variable Rate Basis Mandatory Redemption	3-month LIBOR
Debt instrument, basis spread on variable rate (in hundredths)	2.15%
Trust I [Member]
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Junior Subordinated Debenture Owed to Unconsolidated Subsidiary Trust, Total	12,900,000
Trust II [Member]
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Junior Subordinated Debenture Owed to Unconsolidated Subsidiary Trust, Total	12,900,000
Trust preferred securities [Member]
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Interest Payable In Arrears	2,100,000
Trust preferred securities [Member] | Trust I [Member]
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Aggregate principal amount	12,500,000
Trust preferred securities [Member] | Trust II [Member]
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Aggregate principal amount	12,500,000
Common Securities [Member]
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Aggregate principal amount	387,000
PNC Bank [Member]
Other borrowings [Abstract]
Maturity Date	Jan. 07, 2018
Additional borrowings	$ 40,000,000
Borrowings, weighted average interest rate (in hundredths)	3.65%
Notes payable [Member] | PNC Bank [Member]
Other borrowings [Abstract]
Maturity Date	Aug. 25, 2016
Debt instrument, description of variable rate basis	one month LIBOR
Debt instrument basis points spread on variable rate (in basis points)	15
Interest rate of notes payable (in hundredths)	0.40%