CONSOLIDATED STATEMENTS OF STOCKHOLDERS EQUITY (USD $)	Total		7.875% Series A Cumulative Redeemable Preferred Stock [Member]	6.00% Series B Cumulative Convertible Preferred Stock [Member]	7.625% Series C Cumulative Redeemable Preferred Stock [Member]	7.50% Series D Cumulative Redeemable Preferred Stock [Member]	Common Stock Par Value	Additional Paid-In Capital	Accumulated Other Comprehensive Income	Accumulated Deficit	Accumulated Deficit 7.875% Series A Cumulative Redeemable Preferred Stock [Member]	Accumulated Deficit 6.00% Series B Cumulative Convertible Preferred Stock [Member]	Accumulated Deficit 7.625% Series C Cumulative Redeemable Preferred Stock [Member]	7.875% Series A Cumulative Redeemable Preferred Stock [Member]	7.625% Series C Cumulative Redeemable Preferred Stock [Member]	7.625% Series C Cumulative Redeemable Preferred Stock [Member]	7.50% Series D Cumulative Redeemable Preferred Stock [Member]	7.50% Series D Cumulative Redeemable Preferred Stock [Member]
Beginning balance at Dec. 31, 2010	$ 9,864,900,000						$ 6,316,000	$ 9,175,245,000	$ 1,164,642,000	$ (658,391,000)				$ 177,088,000
Net income (loss)	(101,101,000)									(101,101,000)
Other comprehensive income (loss)	1,908,846,000								1,908,846,000
Exercise of stock options	7,864,000						6,000	7,858,000
Stock option expense and long-term compensation expense	3,862,000						4,000	3,858,000
Conversion of Series B cumulative preferred stock	6,368,000						7,000	6,361,000
Net proceeds from direct purchase and dividend reinvestment	455,706,000						261,000	455,445,000
Net proceeds from follow-on offering	5,351,846,000						3,105,000	5,348,741,000
Contingent beneficial conversion feature on Convertible Senior Notes	44,853,000							44,853,000
Preferred dividends declared			(10,945,000)	(1,761,000)							(10,945,000)	(1,761,000)
Common dividends declared	(1,620,416,000)									(1,620,416,000)
Ending balance at Sep. 30, 2011	15,910,022,000						9,699,000	15,042,361,000	3,073,488,000	(2,392,614,000)				177,088,000
Beginning balance at Jun. 30, 2011
Net income (loss)	(921,813,000)
Conversion of Series B cumulative preferred stock	6,295,000
Preferred dividends declared			(3,600,000)	(524,000)
Common dividends declared	(581,800,000)
Ending balance at Sep. 30, 2011	15,910,022,000													177,088,000
Beginning balance at Dec. 31, 2011	15,760,642,000	[1]					9,702,000	15,068,870,000	3,008,988,000	(2,504,006,000)				177,088,000
Net income (loss)	1,035,405,000									1,035,405,000
Other comprehensive income (loss)	1,060,619,000								1,060,619,000
Exercise of stock options	6,061,000						5,000	6,056,000
Stock option expense and long-term compensation expense	3,857,000							3,857,000
Conversion of Series B cumulative preferred stock	32,272,000						40,000	32,232,000
Net proceeds from direct purchase and dividend reinvestment	1,979,000						1,000	1,978,000
Contingent beneficial conversion feature on Convertible Senior Notes	19,738,000							19,738,000
Equity component on 5% Convertible Senior Notes	11,717,000							11,717,000
Offering expenses	(248,000)							(248,000)
Net proceeds from preferred stock offering					290,514,000	445,457,000										290,514,000		445,457,000
Extinguishment of convertible debt
Preferred dividends declared			(10,945,000)	(289,000)	(8,579,000)						(10,945,000)	(289,000)	(8,579,000)
Common dividends declared	(1,557,537,000)									(1,557,537,000)
Ending balance at Sep. 30, 2012	$ 17,090,663,000						$ 9,748,000	$ 15,144,200,000	$ 4,069,607,000	$ (3,045,951,000)				$ 177,088,000	$ 290,514,000		$ 445,457,000

[1] Derived from the audited consolidated financial statements at December 31, 2011.