Earnings per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2012		Sep. 30, 2011		Sep. 30, 2012		Sep. 30, 2011
Numerator:
Net income	$ (3,320)		$ 4,202		$ 61,042		$ 6,688
Less income attributable to noncontrolling interests, in dollars	(1,114)		(244)		(1,508)		2
Dividends on preferred shares, in dollars	0		0		0		(8,428)
Net effect of the Recapitalization (A)	0	[1]	0		0	[1]	95,460
Income (loss) available to common shareholders, in dollars	$ (2,206)		$ 4,446		$ 62,550		$ 93,718
Denominator:
Weighted average common shares outstanding - basic	90,651,716		90,326,299		90,530,738		39,261,555
Weighted average common shares outstanding - diluted	91,327,558		90,818,200		91,434,982		39,427,324
Basic earnings per share:
Net income	$ (0.03)		$ 0.05		$ 0.67		$ 0.17
Less income attributable to noncontrolling interests	$ (0.01)		$ 0.00		$ (0.02)		$ 0.00
Dividends on preferred shares	$ 0.00		$ 0.00		$ 0.00		$ (0.21)
Net effect of the Recapitalization (A)	$ 0.00	[1]	$ 0.00	[1]	$ 0.00	[1]	$ (2.43)	[1]
Net income (loss) available to common shareholders	$ (0.02)		$ 0.05		$ 0.69		$ 2.39
Diluted earnings per share:
Net income	$ (0.03)		$ 0.05		$ 0.67		$ 0.17
Income (Loss) Attributable to Noncontrolling Interests Per Diluted Share	$ (0.01)		$ 0.00		$ (0.01)		$ 0.00
Dividends on preferred shares	$ 0.00		$ 0.00		$ 0.00		$ (0.21)
Convertible Preferred Stock Converted to Other Securities, Diluted Earnings Per Share Impact	$ 0.00	[1]	$ 0.00	[1]	$ 0.00	[1]	$ 2.42	[1]
Net income (loss) available to common shareholders	$ (0.02)		$ 0.05		$ 0.68		$ 2.38
Stock Options [Member]
Denominator:
Incremental shares related to share-based compensation	451,548		0		548,468		0
Nonvested Shares [Member]
Denominator:
Incremental shares related to share-based compensation	224,294		491,901		355,776		165,769

[1] The net effect of the Recapitalization includes amounts attributable to the Series C Offer and the Series D Exchange and was calculated in accordance with applicable Earnings per Share guidance. The Series C Offer amount is calculated as the difference between (1) the fair value of the consideration transferred to the holders of the Series C Preferred Stock and (2) the carrying amount of the Series C Preferred Stock. The Series D Exchange amount consists of the excess of (1) the fair value of all securities and other consideration transferred by the Company to the Series D Holders over (2) the fair value of securities issuable pursuant to the original conversion terms. See Note 14 to the condensed consolidated financial statements for further details.