CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified					6 Months Ended	12 Months Ended	6 Months Ended
	Jun. 30, 2011	Dec. 31, 2010	Jun. 30, 2011 Consolidated VIE's	Dec. 31, 2010 Consolidated VIE's	Jun. 30, 2011 Preferred Stock, Series A	Dec. 31, 2010 Preferred Stock, Series A	Jun. 30, 2011 Preferred Stock, Series D
Cash and cash equivalents (in dollars)	$ 144,728	$ 276,034	$ 1,634	$ 1,365
Restricted cash (in dollars)	61,143	54,954	3,077	3,581
Accounts receivable, net (in dollars)	36,760	17,285	4,510	1,885
Inventories (in dollars)	2,276	2,101	208	159
Other assets, net (in dollars)	111,840	12,743	0	3
Accounts payable and accrued expenses (in dollars)	28,044	20,889	834	713
Accrued payroll and employee benefits (in dollars)	17,013	12,674	1,060	1,123
Other current liabilities (in dollars)	27,662	16,907	2,229	1,439
Other liabilities (in dollars)	$ 10,263	$ 8,724	$ 15	$ 30
Preferred stock, Series C Cumulative Convertible Redeemable Preferred Stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, Series C Cumulative Convertible Redeemable Preferred Stock, shares authorized	4,102,564	4,102,564
Preferred stock, Series C Cumulative Convertible Redeemable Preferred Stock, shares issued	4,102,564	4,102,564
Preferred stock, Series C Cumulative Convertible Redeemable Preferred Stock, shares outstanding	4,102,564	4,102,564
Preferred stock, Series C Cumulative Convertible Redeemable Preferred Stock, liquidation preference (in dollars per share)	$ 24.375	$ 24.375
Preferred stock, 8.0% Cumulative Redeemable Preferred Stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, 8.0% Cumulative Redeemable Preferred Stock, shares authorized	100,000,000	100,000,000
Preferred stock, 8.0% Cumulative Redeemable Preferred Stock, shares issued					7,050,000	7,050,000	4,600,000
Preferred stock, 8.0% Cumulative Redeemable Preferred Stock, shares outstanding					7,050,000	7,050,000	4,600,000
Preferred stock, 8.0% Cumulative Redeemable Preferred Stock, dividend rate (as a percent)					8.00%	8.00%	8.00%
Preferred stock, 8.0% Cumulative Redeemable Preferred Stock, liquidation preference (in dollars per share)					$ 25.00	$ 25.00	$ 25.00
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	500,000,000	500,000,000
Common stock, shares issued	117,242,818	116,950,504
Common stock, shares outstanding	117,242,818	116,950,504