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Segment Reporting - Financial Information by Reportable Segment (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2021 | Mar. 31, 2020
Revenues |  |
Revenues | $ 290,336 | $ 265,302
Income (loss) from operations |  |
Income (loss) from operations | 12,000 | 43,959
Amortization of intangible assets | (19,407) | (15,417)
Merger and integration costs | (1,012) | (3,764)
Restructuring costs | (18,267) | 0
U.S. Higher Education |  |
Revenues |  |
Revenues | 226,547 | 255,513
Income (loss) from operations |  |
Income (loss) from operations | 47,754 | 56,743
Australia / New Zealand |  |
Revenues |  |
Revenues | 51,265 | 0
Income (loss) from operations |  |
Income (loss) from operations | (2,949) | 0
Alternative Learning |  |
Revenues |  |
Revenues | 12,524 | 9,789
Income (loss) from operations |  |
Income (loss) from operations | $ 5,881 | $ 6,397

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