Parent Company Financial Statements (Details 1) (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
Income
Interest income	$ 17,797	$ 18,191	$ 20,894	$ 21,562	$ 22,471	$ 23,321	$ 24,863	$ 25,732	$ 78,444	$ 96,387	$ 110,748
Expenses
Non-interest expenses	14,302	17,330	17,043	16,494	16,545	14,569	15,910	16,488	65,169	63,512	68,331
Income (loss) before income taxes	4,546	(29,729)	62	3,796	7,928	(8,864)	(1,796)	2,962	(21,325)	230	(37,504)
Income tax benefit	(1,950)	2,838							888		231
Net income (loss)	2,596	(26,891)	62	3,796	7,928	(8,864)	(1,796)	2,962	(20,437)	230	(37,273)
Parent Company [Member]
Income
Interest income									7	5	349
Non-interest income (loss)									(13)	(65)	228
Total income (loss)									(6)	(60)	577
Expenses
Non-interest expenses									693	775	1,957
Total expenses									693	775	1,957
Income (loss) before income taxes									(699)	(835)	(1,380)
Income tax benefit									(22)
Loss before equity in undistributed net earnings of subsidiaries									(677)	(835)	(1,380)
Increase (decrease) in undistributed earnings of subsidiaries									(19,760)	1,065	(35,893)
Net income (loss)									$ (20,437)	$ 230	$ (37,273)