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Segment Reporting (Details) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2018 USD ($) | Sep. 30, 2018 USD ($) | Jun. 30, 2018 USD ($) | Mar. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Sep. 30, 2017 USD ($) | Jun. 30, 2017 USD ($) | Mar. 31, 2017 USD ($) | Dec. 31, 2018 USD ($) segment | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($)
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Operating segments that meet the threshold to qualify as reportable segments | segment |  |  |  |  |  |  |  |  | 2 |  |
Revenues |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | $ 634,185 | $ 454,851 | $ 441,088
Operating income (loss) |  |  |  |  |  |  |  |  |  |  |
Amortization of intangible assets |  |  |  |  |  |  |  |  | (25,694) |  |
Merger costs |  |  |  |  |  |  |  |  | (45,745) | (11,879) |
Fair value adjustments and impairment of intangible assets |  |  |  |  |  |  |  |  | (19,909) | 7,512 | 3,213
Income (loss) from operations | $ 18,875 | $ (57,127) | $ 4,184 | $ 11,328 | $ 11,688 | $ 8,224 | $ 13,854 | $ 18,443 | (22,740) | 52,209 | 57,472
Strayer University |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 471,104 | 449,547 | 435,153
Operating income (loss) |  |  |  |  |  |  |  |  |  |  |
Income (loss) from operations |  |  |  |  |  |  |  |  | 68,188 | 64,801 | 67,991
Capella University |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 154,918 |  |
Operating income (loss) |  |  |  |  |  |  |  |  |  |  |
Income (loss) from operations |  |  |  |  |  |  |  |  | 6,340 |  |
Non-Degree Programs |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 8,163 | 5,304 | 5,935
Operating income (loss) |  |  |  |  |  |  |  |  |  |  |
Income (loss) from operations |  |  |  |  |  |  |  |  | (5,920) | $ (8,225) | $ (13,732)
Segment Reconciling Items |  |  |  |  |  |  |  |  |  |  |
Operating income (loss) |  |  |  |  |  |  |  |  |  |  |
Amortization of intangible assets |  |  |  |  |  |  |  |  | $ (25,694) |  |

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