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INCOME TAXES, Provision for Income Taxes (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
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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
Provision for income taxes [Abstract] |  |  |  |  |  |  |  |  |  |  |
Currently payable |  |  |  |  |  |  |  |  | $ 3,838 | $ 4,583 | $ 2,672
Change in corporate tax rate |  |  |  |  |  |  |  |  | 0 | 1,531 | 0
Deferred |  |  |  |  |  |  |  |  | (435) | (83) | 362
Provision for income taxes | $ 845 | $ 936 | $ 875 | $ 747 | $ 2,934 | $ 1,141 | $ 1,033 | $ 923 | $ 3,403 | $ 6,031 | $ 3,034

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