CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Cash flows from operating activities:
Net cash used in operating activities (Note 18)	$ (16,788)	$ (22,919)
Cash flows from investing activities:
Sale of available for sale investments	198
Proceeds from sale of assets	3,842	2,494
Capitalized costs and acquisitions of property, plant and equipment	(1,667)	(5,161)
Net cash used in investing activities	2,373	(2,667)
Net increase (decrease) in cash and cash equivalents	(14,415)	(25,586)
Cash and cash equivalents - beginning of period	44,406	48,649
Cash and cash equivalents - end of period	$ 29,991	$ 23,063