CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (USD $) In Thousands	Total		7.875% Series A Cumulative Redeemable Preferred Stock	7.625% Series C Cumulative Redeemable Preferred Stock	7.50% Series D Cumulative Redeemable Preferred Stock	Common Stock Par Value	Additional Paid-In Capital	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit	Accumulated Deficit 7.875% Series A Cumulative Redeemable Preferred Stock	Accumulated Deficit 7.625% Series C Cumulative Redeemable Preferred Stock	Accumulated Deficit 7.50% Series D Cumulative Redeemable Preferred Stock	Total stockholders' equity	Total stockholders' equity 7.875% Series A Cumulative Redeemable Preferred Stock	Total stockholders' equity 7.625% Series C Cumulative Redeemable Preferred Stock	Total stockholders' equity 7.50% Series D Cumulative Redeemable Preferred Stock	Noncontrolling Interest	7.875% Series A Cumulative Redeemable Preferred Stock	7.625% Series C Cumulative Redeemable Preferred Stock	7.50% Series D Cumulative Redeemable Preferred Stock
Beginning balance at Dec. 31, 2013	$ 12,405,055					$ 9,474	$ 14,765,761	$ (2,748,933)	$ (534,306)				$ 12,405,055					$ 177,088	$ 290,514	$ 445,457
Net income (loss)	(203,351)								(203,351)				(203,351)
Unrealized gains (losses) on available-for-sale securities	741,172							741,172					741,172
Reclassification adjustment for net (gains) losses included in net income (loss)	(80,718)							(80,718)					(80,718)
Net proceeds from direct purchase and dividend reinvestment	607					1	606						607
Contingent beneficial conversion feature on 4% Convertible Senior Notes	4,186						4,186						4,186
Preferred dividends declared			(3,648)	(5,719)	(8,625)					(3,648)	(5,719)	(8,625)		(3,648)	(5,719)	(8,625)
Common dividends declared, $0.90 and $1.20 Per share for 2015 and 2014 respectively	(284,247)								(284,247)				(284,247)
Ending balance at Mar. 31, 2014	12,564,712					9,475	14,770,553	(2,088,479)	(1,039,896)				12,564,712					177,088	290,514	445,457
Beginning balance at Dec. 31, 2014	13,333,781	[1]				9,476	14,786,509	204,883	(2,585,436)				13,328,491				5,290	177,088	290,514	445,457
Net income (loss)	(476,409)								(476,409)				(476,409)
Net income (loss) attributable to noncontrolling interest	(90)																(90)
Unrealized gains (losses) on available-for-sale securities	631,472							631,472					631,472
Reclassification adjustment for net (gains) losses included in net income (loss)	(62,356)							(62,356)					(62,356)
Stock compensation expense	39						39						39
Net proceeds from direct purchase and dividend reinvestment	570					1	569						570
Equity contributions from (distributions to) noncontrolling interest	(115)																(115)
Preferred dividends declared			(3,648)	(5,719)	(8,625)					(3,648)	(5,719)	(8,625)		(3,648)	(5,719)	(8,625)
Common dividends declared, $0.90 and $1.20 Per share for 2015 and 2014 respectively	(284,310)								(284,310)				(284,310)
Ending balance at Mar. 31, 2015	$ 13,124,590					$ 9,477	$ 14,787,117	$ 773,999	$ (3,364,147)				$ 13,119,505				$ 5,085	$ 177,088	$ 290,514	$ 445,457

[1] Derived from the audited consolidated financial statements at December 31, 2014.