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Note 18 - Income Taxes - Components of Income Tax Provision (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Current: |  |  |  |  |  |  |  |  |  |  |
Federal |  |  |  |  |  |  |  |  | $ 43,850 |  | $ 51
State |  |  |  |  |  |  |  |  | 108 | (276) | 252
Foreign |  |  |  |  |  |  |  |  | 10,816 | 14,040 | 19,175
Total current income tax expense |  |  |  |  |  |  |  |  | 54,774 | 13,764 | 19,478
Deferred: |  |  |  |  |  |  |  |  |  |  |
Federal |  |  |  |  |  |  |  |  | (78,220) |  |
State |  |  |  |  |  |  |  |  | (4,544) |  |
Foreign |  |  |  |  |  |  |  |  | 26,579 | 18,073 | (34,736)
Total deferred tax benefit |  |  |  |  |  |  |  |  | (56,185) | 18,073 | (34,736)
Total provision (benefit) for income taxes | $ (29,669) | $ 11,003 | $ 6,369 | $ 10,886 | $ 2,450 | $ 11,988 | $ 7,890 | $ 9,509 | $ (1,411) | $ 31,837 | $ (15,258)

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