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Note 18 - Income Taxes - Components of Income Tax Provision (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
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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
Federal |  |  |  |  |  |  |  |  | $ 43,935 |  | $ 51
State |  |  |  |  |  |  |  |  | 43 | (276) | 252
Foreign |  |  |  |  |  |  |  |  | 11,186 | 13,554 | 18,808
Total current income tax expense |  |  |  |  |  |  |  |  | 55,164 | 13,278 | 19,111
Federal |  |  |  |  |  |  |  |  | (55,718) | 57 | 168
State |  |  |  |  |  |  |  |  | (3,284) |  |
Foreign |  |  |  |  |  |  |  |  | 25,502 | 23,724 | (35,336)
Total deferred tax provision (benefit) |  |  |  |  |  |  |  |  | (33,500) | 23,781 | (35,168)
Total provision (benefit) for income taxes | $ (28,329) | $ 6,224 | $ 32,765 | $ 11,004 | $ 7,356 | $ 12,109 | $ 8,515 | $ 9,079 | $ 21,664 | $ 37,059 | $ (16,057)

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