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Segment Reporting - Financial Information by Reportable Segment (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Revenues |  |  |
Revenues | $ 1,131,686 | $ 1,027,653 | $ 997,137
Income (loss) from operations |  |  |
Income (loss) from operations | 73,912 | 109,384 | 110,532
Amortization of intangible assets | (51,495) | (64,225) | (61,667)
Merger and integration costs | (11,201) | (13,770) | (21,923)
Restructuring costs | (25,472) | (12,382) | 0
Segment Reconciling Items |  |  |
Income (loss) from operations |  |  |
Amortization of intangible assets | (51,495) | (64,225) | (61,667)
Merger and integration costs | (11,201) | (13,770) | (21,923)
Restructuring costs | (25,472) | (12,382) | 0
U.S. Higher Education |  |  |
Revenues |  |  |
Revenues | 829,270 | 966,579 | 963,052
Income (loss) from operations |  |  |
Income (loss) from operations | 104,914 | 193,393 | 172,889
Australia / New Zealand |  |  |
Revenues |  |  |
Revenues | 250,124 | 23,381 | 0
Income (loss) from operations |  |  |
Income (loss) from operations | 35,855 | (13,275) | 0
Education Technology Services |  |  |
Revenues |  |  |
Revenues | 52,292 | 37,693 | 34,085
Income (loss) from operations |  |  |
Income (loss) from operations | $ 21,311 | $ 19,643 | $ 21,233

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