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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables) | 12 Months Ended
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Dec. 31, 2019
Accounting Policies [Abstract] |
Schedule of Change in Accounting Policy | As a result of this accounting policy change, the following presents the effect of the change on our consolidated statements of income for periods prior to the fourth quarter of 2018 that were retrospectively adjusted:
| December 31, 2018 |  | December 31, 2017
|  |  |  |  | Impact of |  |  |  |  |  | Impact of
(dollars in thousands) | Unadjusted |  | Adjusted |  | Change |  | Unadjusted |  | Adjusted |  | Change
Other operating expense | $ | 135,687 |  |  | $ | 134,682 |  |  | $ | (1,005 | ) |  | $ | 131,817 |  |  | $ | 131,073 |  |  | $ | (744 | )
Income tax expense | 17,753 |  |  | 18,758 |  |  | 1,005 |  |  | 33,852 |  |  | 34,596 |  |  | 744 |
Net income | 59,486 |  |  | 59,486 |  |  | — |  |  | 41,204 |  |  | 41,204 |  |  | — |

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