Details of Certain Accounts - Other Current Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Note receivable (Note 4)	$ 10,000	$ 17,500
Other receivables	426	423
Prepaid insurance	5,433	6,582
Other prepaids	10,751	15,541
Spare parts inventory	4,985	1,857
Value added tax receivable	7,842	9,326
Other	81	72
Total other current assets	$ 39,518	$ 51,301