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Details Of Certain Accounts - Accrued Liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]    
Accrued payroll and related benefits $ 20,705 $ 14,775
Deferred revenue 8,911 12,841
Accrued interest 3,758 4,854
Derivative liability (Note 18) 18,730 23,192
Taxes payable excluding income tax payable 1,214 8,136
Other 5,296 7,843
Total accrued liabilities $ 58,614 $ 71,641