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INCOME TAXES (Schedule of Total Income Tax Expense Differed from Amounts Computed by Applying U.S. Federal Income Tax Rate to Income Before Taxes) (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
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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
Income Tax Disclosure [Abstract] |  |  |  |  |  |  |  |  |  |  |
Computed “expected” tax expense |  |  |  |  |  |  |  |  | $ 13,886 | $ 12,121 | $ 19,008
(Decrease)/increase in taxes resulting from: |  |  |  |  |  |  |  |  |  |  |
Tax-exempt income |  |  |  |  |  |  |  |  | (431) | (402) | (584)
State income taxes, net of Federal benefit |  |  |  |  |  |  |  |  | 2,540 | 2,942 | 1,514
Impact of state tax reform, net of Federal benefit |  |  |  |  |  |  |  |  | 2,954 |  |
Bank owned life insurance income |  |  |  |  |  |  |  |  | (277) | (290) | (475)
Life insurance expense |  |  |  |  |  |  |  |  | 234 | 148 | 479
Gain on death benefit |  |  |  |  |  |  |  |  |  | (630) |
Interest disallowance |  |  |  |  |  |  |  |  | 146 | 115 | 124
Meals and entertainment expense |  |  |  |  |  |  |  |  | 40 | 25 | 76
Stock-based compensation |  |  |  |  |  |  |  |  | (46) | (481) | (982)
Impact of Federal tax reform |  |  |  |  |  |  |  |  |  |  | (1,648)
Other |  |  |  |  |  |  |  |  | (358) | 2 | 298
Total income tax expense | $ 5,555 | $ 5,216 | $ 3,421 | $ 4,496 | $ 2,887 | $ 3,617 | $ 3,832 | $ 3,214 | $ 18,688 | $ 13,550 | $ 17,810

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