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Note 10 - Income Taxes - Components of Income Tax Expense (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Current: |  |  |  |  |  |  |  |  |  |  |
Federal |  |  |  |  |  |  |  |  | $ 20,943 | $ 26,820 | $ 59,433
State |  |  |  |  |  |  |  |  | 39,466 | 36,639 | 28,278
Total Current |  |  |  |  |  |  |  |  | 60,409 | 63,459 | 87,711
Deferred: |  |  |  |  |  |  |  |  |  |  |
Federal |  |  |  |  |  |  |  |  | 7,464 | 1,495 | 31,818
State |  |  |  |  |  |  |  |  | 2,361 | 848 | 2,736
Total Deferred |  |  |  |  |  |  |  |  | 9,825 | 2,343 | 34,554
Total income tax expense | $ 16,290 | $ 20,973 | $ 14,383 | $ 18,588 | $ 17,193 | $ 18,698 | $ 11,046 | $ 18,866 | $ 70,234 | $ 65,802 | $ 122,265

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