Consolidated Statements of Comprehensive Income (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Interest income:
Mortgage-backed securities	$ 102,881	$ 123,629	$ 107,728
Mortgage loans held for investment	2,763	3,503	5,820
Total interest income	105,644	127,132	113,548
Interest expense:
Repurchase agreements	25,821	38,102	33,789
Non recourse collateralized financing	94	926	1,358
Total interest expense	25,915	39,028	35,147
Net interest income	79,729	88,104	78,401
Provision for loan losses	0	(261)	(192)
Gain (loss) on derivative instruments, net	(53,393)	(10,076)	(908)
Gain (loss) on sale of investments, net	16,223	3,354	8,461
Fair value adjustments, net	208	(652)	735
Other income, net	1,046	658	281
General and administrative expenses:
Compensation and benefits	(9,509)	(7,004)	(7,635)
Other general and administrative	(6,498)	(6,054)	(5,101)
Net income (loss)	27,806	68,069	74,042
Preferred Stock Dividends	(9,176)	(7,902)	(2,036)
Net income to common shareholders	18,630	60,167	72,006
Change in fair value of available-for-sale investments	64,567	(113,343)	75,377
Reclassification adjustment for (gain) loss on sale of investments, net	(16,223)	(3,354)	(5,319)
Change in fair value of cash flow hedges	0	16,381	(28,740)
Reclassification adjustment for cash flow hedges (including de-designated hedges)	6,788	13,989	14,448
Other comprehensive (loss) income	55,132	(86,327)	55,766
Comprehensive income (loss) to common shareholders	$ 73,762	$ (26,160)	$ 127,772
Weighted average common shares - basic and diluted	54,701,485	54,647,643	53,146,416
Net income per common share - basic and diluted	$ 0.34	$ 1.10	$ 1.35