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GOODWILL (Tables) | 12 Months Ended
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Dec. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Goodwill by Business Segment | The carrying amount of goodwill attributable to each reportable business segment with changes therein was as follows:
|  | FMS |  | SCS |  | DTS |  | Total
|  | (In thousands)
Balance at January 1, 2019 |  | $ | 243,606 |  |  | $ | 190,792 |  |  | $ | 40,808 |  |  | $ | 475,206 |
Foreign currency translation adjustment |  | 96 |  |  | (277) |  |  | — |  |  | (181) |
Balance at December 31, 2019 |  | 243,702 |  |  | 190,515 |  |  | 40,808 |  |  | 475,025 |
Foreign currency translation adjustment |  | 103 |  |  | 117 |  |  | — |  |  | 220 |
Balance at December 31, 2020 (1) |  | $ | 243,805 |  |  | $ | 190,632 |  |  | $ | 40,808 |  |  | $ | 475,245 |
_______________ (1)Accumulated impairment losses were $26 million and $19 million for FMS and SCS, respectively, as of both December 31, 2020 and 2019

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