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INCOME TAXES (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 | [1] | 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 |  |  |  |  |  |  |  |  | $ 8,762 | $ 14,730 | $ 8,248
State |  |  |  |  |  |  |  |  | 937 | 780 | 1,230
Total current |  |  |  |  |  |  |  |  | 9,699 | 15,510 | 9,478
Deferred: |  |  |  |  |  |  |  |  |  |  |
Federal |  |  |  |  |  |  |  |  | 10,251 | 2,388 | 1,457
State |  |  |  |  |  |  |  |  | (1,004) | 897 | (157)
Total deferred |  |  |  |  |  |  |  |  | 9,247 | 3,285 | 1,300
Income tax expense | $ 5,422 | $ 4,703 | $ 4,505 | $ 4,316 | $ 4,824 | $ 4,663 | $ 4,664 | $ 4,644 | $ 18,946 | $ 18,795 | $ 10,778
[1] | 2017 amount includes a charge to write-down deferred tax assets due to the enactment of the Tax Act of $7.6 million.

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