Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 609,794	$ 418,855
Trade accounts receivable, net (Note 3)	50,715	70,679
Inventory (Note 4)	110,487	111,943
Deferred charges (Note 14)	6,862	7,318
Deferred tax assets (Note 14)	2,049
Prepaid income taxes	9,467	10,514
Prepaid expenses and other assets	7,302	19,735
Total current assets	796,676	639,044
Non-current assets:
Deposits (Note 5)	23,277	23,286
Property, plant and equipment, net (Note 6)	827,716	561,628
Inventory (Note 4)	10,200	4,362
Intangible assets, net (Note 8)	3,084	3,072
Investments (Note 9)	23,608	20,000
Goodwill (Note 10)	3,432	3,432
Other assets	760	301
Total non-current assets	892,077	616,081
Total assets	1,688,753	1,255,125
Current liabilities:
Trade accounts payable	203,986	161,587
Accrued expenses (Note 11)	15,502	12,898
Deferred tax liabilities (Note 14)		1,356
Debt (Note 13)	1,383	1,516
Short-term borrowing-related party (Note 20)		870
Current portion of asset retirement obligation (Note 12)	1,552	396
Total current liabilities	222,423	178,623
Non-current liabilities:
Asset retirement obligation (Note 12)	16,035	15,145
Deferred tax liabilities (Note 14)	18,580	18,899
Debt (Note 13)	197,917	196,545
Other non-current liabilities	861	683
Total non-current liabilities	233,393	231,272
Total liabilities	455,816	409,895
Commitments and contingencies (Note 18)
Stockholders' equity:
Common stock, $0.001 par value; 350,000,000 shares authorized at March 31, 2012 (Note 15)	96	84
Preferred stock, $0.001 par value; 5,000,000 shares authorized at March 31, 2012 (Note 15)	2	2
Additional paid-in capital	1,230,036	838,547
Accumulated other comprehensive loss	(5,951)	(8,481)
Surplus accumulated during the development stage	8,754	15,078
Total stockholders' equity	1,232,937	845,230
Total liabilities and stockholders' equity	$ 1,688,753	$ 1,255,125