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RESTRUCTURING AND INTEGRATION CHARGES AND IMPAIRMENT LOSSES (LIABILITY CLASSIFICATION TABLE) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017
Restructuring Cost and Reserve [Line Items] |  |  |  |
Reduction in force | $ 179 | $ (200) | $ 570 | $ 1,654
Facility exit charges | 2,537 | 621 | 4,029 | 747
Restructuring charges, net | 2,716 | 6,006 | 4,599 | 9,768
Customer Management Services [Member] |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Reduction in force | 97 | (213) | 437 | 1,548
Facility exit charges | 2,462 | 600 | 3,313 | 642
Customer Growth Services [Member] |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Facility exit charges | 75 |  | 716 |
Customer Technology Services [Member] |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Reduction in force |  |  |  | 93
Facility exit charges |  |  |  | 84
Customer Strategy Services [Member] |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Reduction in force | $ 82 | 13 | $ 133 | 13
Facility exit charges |  | $ 21 |  | $ 21

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