Consolidated Statements of Changes in Stockholder's Equity (Unaudited) (USD $) In Thousands	Total	Preferred Equity	Common Stock	Surplus	Retained Earnings	Accumulated Other Comprehensive Income	Treasury Stock
Beginning balance at Dec. 31, 2009	$ 2,738,608	$ 511,107	$ 1,284	$ 1,082,335	$ 1,081,156	$ 63,432	$ (706)
Comprehensive (loss) income:
Net income (loss)	(29,168)				(29,168)
Other comprehensive income	9,741					9,741
Comprehensive income (loss)	(19,427)
Common stock issued:
Issuance of common stock	478,358		448	477,910
Stock-based compensation plans, net	1,486		5	2,566	(1,709)		624
Purchase of treasury stock	(805)						(805)
Cash dividends:
Common stock, $0.02 per share	(3,472)				(3,472)
Preferred stock	(13,125)				(13,125)
Accretion of preferred stock discount		1,617			(1,617)
Stock-based compensation expense, net	4,497			4,497
Tax benefit of stock options	7			7
Ending balance at Jun. 30, 2010	3,186,127	512,724	1,737	1,567,315	1,032,065	73,173	(887)
Beginning balance at Dec. 31, 2010	3,158,791	514,388	1,739	1,573,372	1,041,666	27,626
Comprehensive (loss) income:
Net income (loss)	57,235				57,235
Other comprehensive income	51,719					51,719
Comprehensive income (loss)	108,954
Common stock issued:
Stock-based compensation plans, net	2,283		6	2,437	(113)		(47)
Purchase of treasury stock	(616)						(616)
Cash dividends:
Common stock, $0.02 per share	(3,487)				(3,487)
Preferred stock	(10,062)				(10,062)
Redemption of preferred stock	(262,500)	(262,500)
Accretion of preferred stock discount		6,163			(6,163)
Stock-based compensation expense, net	5,774			5,774
Tax benefit of stock options	11			11
Ending balance at Jun. 30, 2011	$ 2,999,148	$ 258,051	$ 1,745	$ 1,581,594	$ 1,079,076	$ 79,345	$ (663)