Selected Quarterly Financial Data (Unaudited) (Details) (USD $)	3 Months Ended								12 Months Ended			15 Months Ended	36 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	Sep. 30, 2012	Dec. 31, 2012
Quarterly Financial Information Disclosure [Abstract]
Interest income	$ 18,793,000	$ 19,446,000	$ 19,744,000	$ 20,989,000	$ 20,959,000	$ 21,565,000	$ 22,728,000	$ 23,294,000	$ 78,972,000	$ 88,546,000	$ 97,840,000
Interest expense	4,048,000	4,257,000	4,586,000	5,097,000	5,355,000	5,939,000	6,839,000	7,908,000	17,988,000	26,041,000	34,344,000
NET INTEREST INCOME	14,745,000	15,189,000	15,158,000	15,892,000	15,604,000	15,626,000	15,889,000	15,386,000	60,984,000	62,505,000	63,496,000
Provision for loan losses	31,554,000	4,251,000	2,218,000	2,351,000	3,627,000	1,956,000	10,393,000	4,867,000	40,374,000	20,843,000	24,349,000
NET INTEREST INCOME AFTER PROVISION FOR LOAN LOSSES	(16,809,000)	10,938,000	12,940,000	13,541,000	11,977,000	13,670,000	5,496,000	10,519,000	20,610,000	41,662,000	39,147,000
Other income	986,000	4,665,000	4,406,000	3,509,000	4,409,000	5,222,000	3,649,000	4,900,000	13,566,000	18,180,000	21,935,000
Other expense	22,708,000	14,792,000	15,732,000	13,579,000	13,672,000	12,829,000	24,328,000	16,714,000	66,811,000	67,543,000	62,483,000
INCOME (LOSS) BEFORE INCOME TAXES	(38,531,000)	811,000	1,614,000	3,471,000	2,714,000	6,063,000	(15,183,000)	(1,295,000)	(32,635,000)	(7,701,000)	(1,401,000)	14,700,000	(41,737,000)
Income taxes	(14,632,000)	54,000	(9,383,000)	0	(211,000)	2,384,000	5,030,000	(509,000)	(23,961,000)	6,694,000	(1,389,000)
NET INCOME (LOSS)	(23,899,000)	757,000	10,997,000	3,471,000	2,925,000	3,679,000	(20,213,000)	(786,000)	(8,674,000)	(14,395,000)	(12,000)
Preferred stock dividend and accretion of preferred stock discount	1,419,000	838,000	833,000	821,000	771,000	771,000	674,000	771,000	3,911,000	2,987,000	3,181,000
NET LOSS TO COMMON SHAREHOLDERS	$ (25,318,000)	$ (81,000)	$ 10,164,000	$ 2,650,000	$ 2,154,000	$ 2,908,000	$ (20,887,000)	$ (1,557,000)	$ (12,585,107)	$ (17,382,132)	$ (3,193,377)
Earnings per share, basic	$ (1.21)	$ 0	$ 0.52	$ 0.14	$ 0.11	$ 0.15	$ (1.16)	$ (0.10)	$ (0.64)	$ (0.95)	$ (0.20)
Earnings per share, diluted	$ (1.21)	$ 0	$ 0.52	$ 0.14	$ 0.11	$ 0.15	$ (1.16)	$ (0.10)	$ (0.64)	$ (0.95)	$ (0.20)