CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (USD $)		Common Stock [Member]		Additional Paid-In Capital [Member]		Net Income [Member]	Accumulated Deficit [Member]	Other Comprehensive Income (Loss) [Member]	Total
Balance at Dec. 31, 2009		$ 155,316	[1]	$ 724,716,076	[1]		$ (74,499,387)	$ (30,642,933)	$ 619,729,072
Balance (in shares) at Dec. 31, 2009	[1]	15,531,642
Net income (loss)		0	[1]	0	[1]	26,844,650	26,844,650	0	26,844,650
Net unrealized gain on derivatives		0	[1]	0	[1]	0	0	8,507,426	8,507,426
Vesting of restricted shares, net of shares withheld for employee tax		1,085	[1]	(737,528)	[1]	0	0	0	(736,443)
Vesting of restricted shares, net of shares withheld for employee tax (in shares)	[1]	108,442
Non-cash compensation		0	[1]	14,741,813	[1]	0	0	0	14,741,813
Balance at Dec. 31, 2010		156,401	[1]	738,720,361	[1]		(47,654,737)	(22,135,507)	669,086,518
Balance (in shares) at Dec. 31, 2010	[1]	15,640,084
Net income (loss)		0	[1]	0	[1]	(14,819,749)	(14,819,749)	0	(14,819,749)
Change in unrealized gain on investments		0	[1]	0	[1]	0	0	33,103	33,103
Net unrealized gain on derivatives		0	[1]	0	[1]	0	0	12,649,391	12,649,391
Vesting of restricted shares, net of shares withheld for employee tax		1,107	[1]	(1,681,756)	[1]	0	0	0	(1,680,649)
Vesting of restricted shares, net of shares withheld for employee tax (in shares)	[1]	110,712
Non-cash compensation		0	[1]	8,907,089	[1]	0	0	0	8,907,089
Balance at Dec. 31, 2011		157,508	[1]	745,945,694	[1]		(62,474,486)	(9,453,013)	674,175,703
Balance (in shares) at Dec. 31, 2011	[1]	15,750,796
Net income (loss)		0	[1]	0	[1]	(102,800,903)	(102,800,903)	0	(102,800,903)
Change in unrealized gain on investments		0	[1]	0	[1]	0	0	(798,712)	(798,712)
Net unrealized gain on derivatives		0	[1]	0	[1]	0	0	7,242,283	7,242,283
Vesting of restricted shares, net of shares withheld for employee tax		1,684	[1]	(240,999)	[1]	0	0	0	(239,315)
Vesting of restricted shares, net of shares withheld for employee tax (in shares)	[1]	168,380
Issuance of warrants		0	[1]	7,241,743	[1]	0	0	0	7,241,743
Exercise of warrants		7,186	[1]	(7,186)	[1]	0	0	0	0
Exercise of warrants (in shares)	[1]	718,916
Non-cash compensation		0	[1]	9,373,778	[1]	0	0	0	9,373,778
Balance at Dec. 31, 2012		$ 166,378	[1]	$ 762,313,030	[1]		$ (165,275,389)	$ (3,009,442)	$ 594,194,577
Balance (in shares) at Dec. 31, 2012	[1]	16,638,092

[1] Adjusted to give effect to the 1 for 4 reverse stock split that became effective on May 22, 2012, see Note 11.