CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (USD $) In Thousands	Total USD ($)	Common Stock [Member]	Preferred Stock [Member] USD ($)	Common Stock and Paid in Capital [Member] USD ($)	Retained Earnings (Accumulated Deficit) [Member] USD ($)	Accumulated Other Comprehensive Income (Loss) [Member] USD ($)	Unearned Restricted ESOP Shares [Member] USD ($)	Carrying Value, Net of Liability, Of Shares Held in Trust for Stock-Related Compensation Plans [Member] USD ($)
Balance, beginning of the period at Dec. 31, 2009	$ 405,128		$ 117,407	$ 331,538	$ (42,077)	$ 249	$ (1,987)	$ (2)
Balance, beginning of the period, shares at Dec. 31, 2009		3,077
Net income (loss)	(61,896)				(61,896)
Change in valuation of securities - available-for-sale, net of income tax	59					59
Amortization of unrealized loss on tax exempt securities transferred from available-for-sale to held-to-maturity, net of income tax	42					42
Accretion of preferred stock discount	0		1,593		(1,593)
Gain on repurchase of preferred stock	0
Accrual of dividends on preferred stock	(6,200)				(6,200)
Accrual of dividends on common stock	(3,582)				(3,582)
Proceeds from issuance of common stock for stockholder reinvestment program, net of registration expenses amount	16,201			16,201
Cash proceeds from issuance of stock in secondary offering, net of costs	161,637			161,637
Amortization of compensation related to MRP	2							2
Amortization of compensation related to restricted stock grant	28			28
Amortization of compensation related to stock options	53			53
Issuance of unvested restricted common stock or exercise of stock options		17
Issuance of common stock for stockholder reinvestment program		837
Issuance of common stock through public offering		12,234
Net number of shares issued during the period		13,088
Balance, end of the period at Dec. 31, 2010	511,472		119,000	509,457	(115,348)	350	(1,987)	0
Balance, end of the period, shares at Dec. 31, 2010	16,131	16,165					(34)
Net income (loss)	5,457				5,457
Change in valuation of securities - available-for-sale, net of income tax	1,685					1,685
Amortization of unrealized loss on tax exempt securities transferred from available-for-sale to held-to-maturity, net of income tax	16					16
Accretion of preferred stock discount	0		1,701		(1,701)
Gain on repurchase of preferred stock	0
Accrual of dividends on preferred stock	(6,200)				(6,200)
Accrual of dividends on common stock	(1,673)				(1,673)
Proceeds from issuance of common stock for stockholder reinvestment program, net of registration expenses amount	21,556			21,556
Cash proceeds from issuance of stock in secondary offering, net of costs	0
Amortization of compensation related to restricted stock grant	111			111
Amortization of compensation related to stock options	25			25
Other	1		1
Issuance of unvested restricted common stock or exercise of stock options		16
Issuance of common stock for stockholder reinvestment program		1,372
Issuance of common stock through public offering		0
Net number of shares issued during the period		1,388
Balance, end of the period at Dec. 31, 2011	532,450		120,702	531,149	(119,465)	2,051	(1,987)	0
Balance, end of the period, shares at Dec. 31, 2011	17,519	17,553					(34)
Net income (loss)	64,882				64,882
Change in valuation of securities - available-for-sale, net of income tax	42					42
Amortization of unrealized loss on tax exempt securities transferred from available-for-sale to held-to-maturity, net of income tax	8					8
Accretion of preferred stock discount	0		3,298		(3,298)
Repurchase of preferred stock	(124,000)		(124,000)
Gain on repurchase of preferred stock	2,471				2,471
Accrual of dividends on preferred stock	(4,938)				(4,938)
Accrual of dividends on common stock	(754)				(754)
Proceeds from issuance of common stock for stockholder reinvestment program, net of registration expenses amount	36,317			36,317
Cash proceeds from issuance of stock in secondary offering, net of costs	0
Amortization of compensation related to restricted stock grant	434			434
Amortization of compensation related to stock options	7			7
Issuance of unvested restricted common stock or exercise of stock options		87
Issuance of common stock for stockholder reinvestment program		1,815
Issuance of common stock through public offering		0
Net number of shares issued during the period		1,902
Balance, end of the period at Dec. 31, 2012	$ 506,919		$ 0	$ 567,907	$ (61,102)	$ 2,101	$ (1,987)	$ 0
Balance, end of the period, shares at Dec. 31, 2012	19,421	19,455					(34)