Earnings per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended	12 Months Ended			27 Months Ended	12 Months Ended			3 Months Ended							12 Months Ended
	Dec. 31, 2011	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Sep. 30, 2008 Class_of_stock	Dec. 31, 2011 Common Stock [Member]	Dec. 31, 2011 Series B Preferred Stock [Member]	Dec. 31, 2009 Series B Preferred Stock [Member]	Sep. 30, 2011 As Restated [Member]	Jun. 30, 2011 As Restated [Member]	Mar. 31, 2011 As Restated [Member]	Dec. 31, 2010 As Restated [Member]	Sep. 30, 2010 As Restated [Member]	Jun. 30, 2010 As Restated [Member]	Mar. 31, 2010 As Restated [Member]	Dec. 31, 2010 As Restated [Member]		Dec. 31, 2009 As Restated [Member]		Dec. 31, 2010 As Restated [Member] Common Stock [Member]	Dec. 31, 2009 As Restated [Member] Common Stock [Member]	Dec. 31, 2010 As Restated [Member] Series B Preferred Stock [Member]	Dec. 31, 2009 As Restated [Member] Series B Preferred Stock [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Number of classes of stock					2
Net income		$ 82,688	$ 2,141	$ 27,575												$ 2,141	[1]	$ 27,575	[1]
Consideration paid in excess of carrying value on the repurchase of redeemable preferred stock		0		(8,593)				(8,593)								0	[1]	(8,593)	[1]
Income (loss) applicable to common shareholders	(3,575)	82,688							(18,287)	(12,713)	(48,113)	(3,999)	(8,863)	431	10,290	2,141	[1]	18,982	[1]
Undistributed earnings allocated to participating securities						82,688	0													2,141	17,770	0	1,212
Undistributed earnings, basic		$ 82,688														$ 2,141		$ 18,982
Weighted average number of shares outstanding, basic (in shares)		42,412,000				42,412,000	0									41,173,000	[1]	34,936,000	[1]	41,173,000	32,706,000	0	2,230,000
Weighted average number diluted shares outstanding adjustment (in shares)		349,000														537,000		322,000
Weighted average number of shares outstanding, diluted (in shares)		42,761,000														41,710,000	[1]	35,258,000	[1]
Basic net income per common share (price per share)	$ 0.08	$ 1.95				$ 1.95	$ 0.00		$ 0.43	$ 0.30	$ 1.14	$ 0.10	$ 0.21	$ (0.01)	$ (0.26)	$ 0.05	[1]	$ 0.54	[1]	$ 0.05	$ 0.54	$ 0.00	$ 0.54
Diluted net income per common share (price per share)	$ 0.08	$ 1.93							$ 0.43	$ 0.30	$ 1.13	$ 0.09	$ 0.21	$ (0.01)	$ (0.26)	$ 0.05	[1]	$ 0.54	[1]
Dilutive securities excluded from computation of earnings per share, amount (in shares)		3,000	12,000	795,000

[1] As restated - See Note 23 “Restatement of Previously Issued Financial Statements” of Notes to Consolidated Financial Statements.