Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) (USD $) In Thousands, except Share data, unless otherwise specified	9 Months Ended	12 Months Ended
	Sep. 30, 2014	Dec. 31, 2013
Pledged securities (in Dollars)	$ 683,914	$ 853,223
Assets of consolidated variable interest entity (VIEs) (in Dollars)	8,776,429	8,665,829
Accrued expenses and other liabilities, related parties (in Dollars)	5,297	951
Variable Interest Entity, Consolidated, Carrying Amount, Liabilities (in Dollars)	$ 8,419,738	$ 8,365,345
Preferred stock, par value (in Dollars per share)	$ 0.01
Preferred stock, shares issued	3,000,000	3,000,000
Preferred stock, shares authorized	200,000,000
Preferred stock, shares outstanding	3,000,000	3,000,000
Common stock, par value (in Dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	400,000,000	400,000,000
Common Stock, Shares Issued	90,684,546	64,102,029
Common stock, shares outstanding	90,684,546	64,102,029
Series B Preferred Stock [Member]
Preferred stock, par value (in Dollars per share)	$ 0.01	$ 0.01
Preferred stock, liquidation preference per share (in Dollars per share)	$ 25	$ 25
Preferred stock, shares issued	3,000,000	3,000,000
Preferred stock, shares authorized	3,450,000	3,450,000
Preferred stock, shares outstanding	3,000,000	3,000,000
Preferred stock, Series B cumulative redeemable, dividend rate	7.75%	7.75%