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GOODWILL (Tables) | 6 Months Ended
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Jun. 30, 2019
Goodwill and Intangible Assets Disclosure [Abstract] |
Changes in Carrying Amount of Goodwill |
(Dollars in thousands) | June 30, 2019 |  | December 31, 2018
Balance at beginning of year | $ | 880,251 |  |  | $ | 204,084 |
Goodwill resulting from business combinations | (524 | ) |  | 676,167 |
Balance at end of period | $ | 879,727 |  |  | $ | 880,251 |

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