Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
ASSETS
Mortgage-backed securities	$ 3,959,852	$ 4,018,161
Mortgage loans held for investment	53,804	55,423
Cash and cash equivalents	61,168	69,330
Restricted cash	18,242	13,385
Derivative assets	12,064	18,488
Principal receivable on investments	8,112	12,999
Accrued interest receivable	23,387	21,703
Other assets, net	7,653	7,648
Total assets	4,144,282	4,217,137
Liabilities:
Repurchase agreements	3,485,544	3,580,754
Payable for unsettled mortgage-backed securities	16,086	10,358
Non recourse collateralized financing	12,394	12,914
Derivative Liabilities	11,137	6,681
Accrued interest payable	2,846	2,548
Accrued dividends payable	15,612	16,601
Other liabilities	1,648	1,405
Total liabilities	3,545,267	3,631,261
Shareholders’ equity:
Common stock, par value $.01 per share, 200,000,000 shares authorized; 54,697,307 and 54,310,484 shares issued and outstanding, respectively	547	543
Additional paid-in capital	761,827	761,550
Accumulated other comprehensive income	(4,256)	(33,816)
Accumulated deficit	(268,761)	(252,059)
Total shareholders' equity	599,015	585,876
Total liabilities and shareholders’ equity	4,144,282	4,217,137
Series A Preferred Stock [Member]
Shareholders’ equity:
Preferred Stock, par value $.01 per share	55,407	55,407
Series B Preferred Stock [Member]
Shareholders’ equity:
Preferred Stock, par value $.01 per share	$ 54,251	$ 54,251