Quarterly report pursuant to Section 13 or 15(d)

Income Taxes (Narrative) (Detail)

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Income Taxes (Narrative) (Detail)
$ in Thousands
3 Months Ended
Mar. 31, 2016
USD ($)
Current Income Tax Expense (Benefit) $ 3,000
Angola [Member]  
Current Income Tax Expense (Benefit) $ 3,000