Earnings Per Common Share (Computation of Basic and Diluted Earnings (Loss) Per Common Share) (Details) (USD $) In Thousands, except Per Share data	3 Months Ended				6 Months Ended				12 Months Ended
	Jun. 30, 2011		Jun. 30, 2010		Jun. 30, 2011		Jun. 30, 2010		Dec. 31, 2010
Earnings Per Common Share
Net income	$ 17,785		$ 3,463		$ 31,252		$ 11,977		$ 28,326
Preferred stock dividends							12,192		3,686
Dividends and undistributed earnings allocated to participating securities	86	[1]	16	[1]	148	[1]	31	[1]
Net earnings (loss) available to common shareholders	$ 17,699		$ 3,447		$ 31,104		$ (246)
Weighted average number of common shares outstanding - basic	114,611		110,135		114,593		101,205
Effect of potentially dilutive common shares	174	[2]	220	[2]	203	[2]	230	[2]
Preferred convertible stock			4,378
Weighted average number of common shares outstanding - diluted	114,785		114,733		114,796		101,435
Basic	$ 0.15		$ 0.03		$ 0.27
Diluted	$ 0.15		$ 0.03		$ 0.27

[1] Represents dividends paid and undistributed earnings allocated to nonvested restricted stock awards.

[2] Represents the effect of the assumed exercise of warrants, assumed exercise of stock options, vesting of non-participating restricted shares, and vesting of restricted stock units, based on the treasury stock method.