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Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Income Statement [Abstract] |  |  |
Revenues | $ 997,137 | $ 634,185 | $ 454,851
Costs and expenses: |  |  |
Instructional and support costs | 530,604 | 371,542 | 268,943
General and administration | 272,411 | 194,035 | 129,332
Amortization of intangible assets | 61,667 | 25,694 | 0
Merger and integration costs | 21,923 | 45,745 | 11,879
Fair value adjustments and impairment of intangible assets | 0 | 19,909 | (7,512)
Total costs and expenses | 886,605 | 656,925 | 402,642
Income (loss) from operations | 110,532 | (22,740) | 52,209
Other income | 13,192 | 3,601 | 437
Income (loss) before income taxes | 123,724 | (19,139) | 52,646
Provision (benefit) for income taxes | 42,586 | (3,468) | 32,034
Net income (loss) | $ 81,138 | $ (15,671) | $ 20,612
Earnings (loss) per share: |  |  |
Basic (dollars per share) | $ 3.73 | $ (1.03) | $ 1.93
Diluted (dollars per share) | $ 3.67 | $ (1.03) | $ 1.84
Weighted average shares outstanding: |  |  |
Basic (in shares) | 21,725 | 15,190 | 10,678
Diluted (in shares) | 22,097 | 15,190 | 11,199

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