Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Interest income:
Mortgage-backed securities	$ 70,874	$ 80,969	$ 233,506	$ 266,734
Mortgage loans	1,786		3,341
Short-term cash investments	328	330	934	959
Total interest income	72,988	81,299	237,781	267,693
Interest expense:
Repurchase agreements	20,956	31,950	72,020	105,529
Warehouse lines	292		292
Total interest expense	21,248	31,950	72,312	105,529
Net interest margin	51,740	49,349	165,469	162,164
Other income (loss):
Net mortgage servicing rights income	3,808		3,808
Management fee income	524		524
Net realized gain on sale of mortgage-backed securities	1,216	237	17,360	3,089
Net unrealized loss on mortgage-backed securities	(912)		(912)
Net gain on mortgage loans	1,361		916
Net loss on mortgage servicing rights	(539)		(539)
Net gain (loss) on derivative instruments	(130,301)	35,430	(252,501)	(61,445)
Total other income (loss)	(124,843)	35,667	(231,344)	(58,356)
Operating expenses:
Management fee	4,037	4,122	12,215	12,420
Share-based compensation	966	890	3,045	2,592
General and administrative	5,786	2,113	12,736	6,584
Total operating expenses	10,789	7,125	27,996	21,596
Net income (loss)	(83,892)	77,891	(93,871)	82,212
Dividends on preferred stock	5,480	5,480	16,441	16,441
Net income (loss) available to common shareholders	$ (89,372)	$ 72,411	$ (110,312)	$ 65,771
Earnings (loss) per share - common stock, basic	$ (0.93)	$ 0.75	$ (1.14)	$ 0.68
Earnings (loss) per share - common stock, diluted	(0.93)	0.75	(1.14)	0.68
Dividends per share of common stock	$ 0.45	$ 0.50	$ 1.45	$ 1.50
Weighted average common shares outstanding, basic	96,545,913	96,563,132	96,705,682	96,561,446
Weighted average common shares outstanding, diluted	96,545,913	96,563,132	96,705,682	96,561,446