Details Of Certain Accounts - Accrued Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Accrued payroll and related benefits	$ 20,660	$ 14,775
Deferred revenue	12,789	12,841
Accrued interest	969	4,854
Derivative liability (Note 14)	17,721	23,192
Taxes payable excluding income tax payable	9,018	8,136
Other	8,747	7,843
Total accrued liabilities	$ 69,904	$ 71,641