Quarterly Financial Data (Unaudited) (Details) (USD $)	3 Months Ended																12 Months Ended
	Dec. 31, 2012		Sep. 30, 2012		Jun. 30, 2012		Mar. 31, 2012		Dec. 31, 2011		Sep. 30, 2011		Jun. 30, 2011		Mar. 31, 2011		Dec. 31, 2012	Dec. 31, 2011		Dec. 31, 2010
Quarterly Financial Data (Unaudited) [Abstract]
Interest income	$ 4,013,000	[1]	$ 4,043,000	[2]	$ 4,436,000	[3]	$ 4,648,000	[4]	$ 5,070,000	[5]	$ 5,064,000	[6]	$ 5,296,000	[7]	$ 5,449,000	[8]	$ 17,140,000	$ 20,879,000		$ 24,305,000
Net interest income	3,805,000	[1]	3,816,000	[2]	4,179,000	[3]	4,284,000	[4]	4,638,000	[5]	4,543,000	[6]	4,668,000	[7]	4,648,000	[8]	16,084,000	18,497,000		19,298,000
Net loss	(5,140,000)	[1]	(2,069,000)	[2]	(2,531,000)	[3]	(2,840,000)	[4]	(1,617,000)	[5]	(1,686,000)	[6]	(2,282,000)	[7]	(1,102,000)	[8]	(12,580,000)	(6,687,000)		(6,362,000)
Loss per share - basic and diluted (in dollars per share)	$ (1.27)	[1]	$ (0.55)	[2]	$ (0.66)	[3]	$ (0.73)	[4]	$ (0.44)	[5],[9]	$ (0.46)	[6],[9]	$ (0.60)	[7],[9]	$ (0.32)	[8],[9]	$ (3.21)	$ (1.81)	[9]
Provision for loan and lease losses	5,000,000		2,100,000		2,600,000		1,400,000		1,200,000		2,000,000		2,500,000		1,200,000		11,100,000	6,900,000		9,668,000
Write-down of other real estate owned	1,000,000		1,200,000		723,000		2,000,000		1,900,000		797,000		655,000		673,000		4,867,000	4,018,000		3,791,000
Loss on sale of other real estate owned							216,000										(247,000)	17,000		(236,000)
Increase in nonperforming loans													11,700,000
Reversed loan interest income for loans placed on non-accrual status			238,000
Loan and collection expenses pertaining to nonperforming loans													624,000				641,000	818,000		237,000
Impairment write-downs of securities															163,000
Gain on sale of securities									$ 250,000		$ 135,000		$ 142,000				$ 0	$ 527,000		$ 2,390,000

[1] During the fourth quarter of 2012, there was a provision for loan and lease losses of $5.0 million as collateral values declined. The Company also recognized $1.0 million of write-downs on other real estate owned as the values of these properties decreased.

[2] During the third quarter of 2012, there was a provision for loan and lease losses of $2.1 million as collateral values declined. The Company also recognized $1.2 million of write-downs on other real estate owned as the values of these properties decreased. The Company reversed $238,000 of loan interest income as loans were placed on nonaccrual status.

[3] During the second quarter 2012, there was a provision for loan and lease losses of $2.6 million as collateral values declined. The Company also recognized $723,000 of write-downs on other real estate owned as the values of these properties decreased.

[4] During the first quarter 2012, the Company recognized $2.0 million of write-downs on other real estate owned as the values of these properties decreased. A provision for loan and lease losses of $1.4 million was made as real estate values on properties used as collateral for nonperforming loans declined. The Company also recognized a net loss on the sale of other real estate owned of $216,000

[5] During the fourth quarter 2011, the Company recognized a write-down to its other real estate owned of $1.9 million as the value of these properties declined. The provision for loan and lease losses was $1.2 million as collateral values declined. The Company recognized gains on the sale of securities of $250,000.

[6] During the third quarter of 2011, the Company had a provision for loan and lease losses of $2.0 million as collateral values declined. The Company recognized a write-down to its other real estate owned of $797,000. The Company recognized gains on the sale of securities of $135,000.

[7] During the second quarter 2011, there was a provision for loan and lease losses of $2.5 million as nonperforming loans increased $11.7 million during the quarter. The Company recognized write-downs of $655,000 on its other real estate owned as real estate values declined and loan and collection expenses of $624,000 pertaining to nonperforming loans. The Company recognized gains on the sale of securities of $142,000.

[8] During the first quarter 2011, there was a provision for loan and lease losses of $1.2 million as collateral values declined. The Company also recognized $673,000 of write-downs on other real estate owned as the values of these properties decreased. The Company recognized impairment write-downs of $163,000 on its collateralized debt obligations and equity securities carried in the Company's securities portfolio

[9] Earnings per share for the quarters and fiscal year have been calculated separately. Accordingly, quarterly amounts may not add to the annual amounts because of rounding and differences to average shares outstanding from quarter to quarter.