Annual report pursuant to Section 13 and 15(d)

Income Taxes (Statutory Rate Reconciliation) (Detail)

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Income Taxes (Statutory Rate Reconciliation) (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Statutory rate reconciliation      
Tax provision computed at U.S. statutory rate $ (50,424) $ (19,273) $ 27,015
Foreign taxes not offset in U.S. by foreign tax credits (19,445) 4,433 (2,072)
Effect of change in foreign statutory rates 3,014    
Permanent Differences 1,802 135 973
Foreign Tax Credit Adjustments   8,417 (28,027)
Increase/(Decrease) in Valuation Allowance 79,640 28,762 37,752
Other   12 (1,526)
Income Tax Expense (Benefit), Total $ 14,587 $ 22,486 $ 34,115