Condensed Parent Company Information (Details 2) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Operating Activities:
Net income (loss)	$ (23,406)	$ 13,642	$ 9,982
Decrease in other assets	(29,952)	(30,096)	(32,538)
Increase (decrease) in other liabilities	(2,940)	(330)	597
Net cash provided by operating activities	41,681	37,046	64,109
Investing Activities:
Net cash provided by investing activities	5,722	171,261	72,336
Financing Activities:
Proceeds from issuance of preferred stock	7,287	63,500
Proceeds from issuance of common stock	26,727	881	840
Repurchases of common stock	(2)	(228)
Repurchase of common stock warrants		(924)
Net cash provided (used) by financing activities	(22,063)	(204,142)	(275,315)
Net increase (decrease) in cash	25,340	4,165	(138,870)
Cash and cash equivalents, beginning of Year	216,167	212,002	350,872
Cash and cash equivalents, end of Year	241,507	216,167	212,002
Parent Company
Operating Activities:
Net income (loss)	(23,406)	13,642	9,982
Equity in undistributed (earnings) losses of subsidiaries	21,493	(5,862)
Dividend from subsidiaries in excess of earnings	10,000		14,536
Decrease in other assets	26	38	32
Increase (decrease) in other liabilities	199	(62)	17
Net cash provided by operating activities	8,312	7,756	24,567
Investing Activities:
Downstream cash investment in subsidiary	(33,850)	(16,250)
Cash proceeds from dissolution of subsidiary			706
Net cash provided by investing activities	(33,850)	(16,250)	706
Financing Activities:
Payment of preferred and common cash dividends	(8,463)	(8,237)	(8,609)
Proceeds from issuance of preferred stock	7,287	63,500
Redemption of preferred stock		(65,000)
Proceeds from issuance of common stock	26,727	881	840
Repurchases of common stock	(2)	(228)
Repurchase of common stock warrants		(924)
Net cash provided (used) by financing activities	25,549	(10,008)	(7,769)
Net increase (decrease) in cash	11	(18,502)	17,504
Cash and cash equivalents, beginning of Year	3,324	21,826	4,322
Cash and cash equivalents, end of Year	$ 3,335	$ 3,324	$ 21,826