Parent Company Only Condensed Financial Statements Parent Company Condensed Statements of Operations and Comprehensive Income (Loss) (Details) (USD $) In Thousands, unless otherwise specified	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
Non-interest expense	$ (9,082)	$ (8,969)	$ (8,542)	$ (10,207)	$ (10,893)	$ (9,186)	$ (11,071)	$ (9,967)	$ (36,800)	$ (41,117)	$ (37,775)
Income (loss) before income tax expense (benefit)	2,220	1,752	1,895	490	(11,935)	310	1,658	438	6,357	(9,529)	4,167
Income tax benefit	(658)	(493)	(541)	0	(638)	84	(425)	34	(1,692)	(945)	(707)
Net income (loss)	1,562	1,259	1,354	490	(12,573)	394	1,233	472	4,665	(10,474)	3,460
Net change in unrealized gains (losses) on available-for-sale securities (net of tax of $3,674, $1,872, and $65, respectively)									4,973	2,124	(185)
Total comprehensive income (loss)									8,703	(9,450)	2,824
Parent Company
Interest income									3	5	9
Non-interest expense									(697)	(847)	(1,302)
Income (loss) before income tax expense (benefit)									(694)	(842)	(1,293)
Income tax benefit									267	329	475
Net loss before equity in undistributed earnings (loss) of subsidiary									(427)	(513)	(818)
Equity in undistributed earnings (loss) of subsidiary									5,092	(9,961)	4,278
Net income (loss)									4,665	(10,474)	3,460
Net change in unrealized gains (losses) on available-for-sale securities (net of tax of $3,674, $1,872, and $65, respectively)									4,038	1,024	(636)
Total comprehensive income (loss)									$ 8,703	$ (9,450)	$ 2,824