CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Cash flows from operating activities:
Net cash used in operating activities (Note 16)	$ (22,919)	$ (31,526)
Cash flows from investing activities:
Sale of available for sale investments		287
Proceeds from sale of assets	2,494	98
Capitalized costs and acquisitions of property, plant and equipment	(5,161)	(4,851)
Net cash used in investing activities	(2,667)	(4,466)
Net decrease in cash and cash equivalents	(25,586)	(35,992)
Cash and cash equivalents - beginning of period	48,649	120,990
Cash and cash equivalents - end of period	$ 23,063	$ 84,998