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Goodwill and Other Intangible Assets - Summary of Change in the Net Carrying Amount of Goodwill (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Goodwill [Roll Forward] |  |  |
Balance, beginning of period | $ 1,934,464 | $ 2,115,897 |
Acquisitions | 3,584 | 0 |
Dispositions | (488) | (148,264) |
Re-allocation of goodwill for segment change and Reclassification to Long-term assets held for sale | (32,740) | 0 |
Impairments | 0 | (23,465) | $ 0
Currency translation adjustments | 49,846 | (9,704) |
Adjustments to prior acquisitions | 0 | 0 |
Balance, end of period | 1,954,666 | 1,934,464 | 2,115,897
Brazil |  |  |
Goodwill [Roll Forward] |  |  |
Balance, beginning of period | 501,055 | 417,938 |
Acquisitions | 0 | 0 |
Dispositions | 0 | 0 |
Re-allocation of goodwill for segment change and Reclassification to Long-term assets held for sale | 0 | 0 |
Impairments | 0 | 0 | 0
Currency translation adjustments | (7,682) | 83,117 |
Adjustments to prior acquisitions | 0 | 0 |
Balance, end of period | 493,373 | 501,055 | 417,938
Mexico |  |  |
Goodwill [Roll Forward] |  |  |
Balance, beginning of period | 480,985 | 578,350 |
Acquisitions | 0 | 0 |
Dispositions | 0 | 0 |
Re-allocation of goodwill for segment change and Reclassification to Long-term assets held for sale | 0 | 0 |
Impairments | 0 | 0 | 0
Currency translation adjustments | 22,388 | (97,365) |
Adjustments to prior acquisitions | 0 | 0 |
Balance, end of period | 503,373 | 480,985 | 578,350
Andean & Iberian |  |  |
Goodwill [Roll Forward] |  |  |
Balance, beginning of period | 297,519 | 292,219 |
Acquisitions | 0 | 0 |
Dispositions | 0 | 0 |
Re-allocation of goodwill for segment change and Reclassification to Long-term assets held for sale | 0 | 0 |
Impairments | 0 | 0 | 0
Currency translation adjustments | 24,243 | 5,300 |
Adjustments to prior acquisitions | 0 | 0 |
Balance, end of period | 321,762 | 297,519 | 292,219
Central America & U.S. Campuses |  |  |
Goodwill [Roll Forward] |  |  |
Balance, beginning of period | 58,005 | 53,138 |
Acquisitions | 0 | 0 |
Dispositions | 0 | 0 |
Re-allocation of goodwill for segment change and Reclassification to Long-term assets held for sale | 0 | 4,867 |
Impairments | 0 | 0 | 0
Currency translation adjustments | 0 | 0 |
Adjustments to prior acquisitions | 0 | 0 |
Balance, end of period | 58,005 | 58,005 | 53,138
EMEAA |  |  |
Goodwill [Roll Forward] |  |  |
Balance, beginning of period | 137,114 | 314,466 |
Acquisitions | 3,584 | 0 |
Dispositions | (488) | (148,264) |
Re-allocation of goodwill for segment change and Reclassification to Long-term assets held for sale | (32,740) | (4,867) |
Impairments | 0 | (23,465) | 0
Currency translation adjustments | 9,943 | (756) |
Adjustments to prior acquisitions | 0 | 0 |
Balance, end of period | 117,413 | 137,114 | 314,466
Online & Partnerships |  |  |
Goodwill [Roll Forward] |  |  |
Balance, beginning of period | 459,786 | 459,786 |
Acquisitions | 0 | 0 |
Dispositions | 0 | 0 |
Re-allocation of goodwill for segment change and Reclassification to Long-term assets held for sale | 0 | 0 |
Impairments | 0 | 0 | 0
Currency translation adjustments | 954 | 0 |
Adjustments to prior acquisitions | 0 | 0 |
Balance, end of period | $ 460,740 | $ 459,786 | $ 459,786

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