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INCOME TAXES ( Summary of Income Tax Expense) (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Current federal |  |  |  |  |  |  |  |  | $ 16,871 | $ 27,064 | $ 23,749
Deferred federal |  |  |  |  |  |  |  |  | 707 | (199) | 268
Revalue deferred taxes due to tax reform |  |  |  |  |  |  |  |  | (408) | 4,137 | 0
Current state |  |  |  |  |  |  |  |  | 1,462 | 1,559 | 1,086
Deferred state |  |  |  |  |  |  |  |  | (99) | (257) | 30
Total income tax expense | $ 5,480 | $ 4,679 | $ 5,110 | $ 3,264 | $ 11,779 | $ 7,573 | $ 7,394 | $ 5,558 | $ 18,533 | $ 32,304 | $ 25,133

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