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Business Acquisitions - Supplementary Information on Unaudited Pro Forma Financial Basis (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Fiscal 2022 Acquisitions |  |  |
Revenues | $ 1,407,300 | $ 1,461,178 |
Net income from continuing operations | $ 64,877 | $ 398,201 |
EPS - Basic (in usd per share) | $ 1.38 | $ 8.67 |
EPS - Diluted (in usd per share) | $ 1.38 | $ 8.31 |
Fiscal 2021 Acquisitions |  |  |
Revenues |  | $ 1,482,323 | $ 1,267,280
Net income from continuing operations |  | $ 416,348 | $ 33,351
EPS - Basic (in usd per share) |  | $ 9.06 | $ 0.72
EPS - Diluted (in usd per share) |  | $ 8.69 | $ 0.71
SEOmoz Acquisition |  |  |
Revenues |  | $ 1,438,099 | $ 1,207,910
Net income from continuing operations |  | $ 406,281 | $ 29,382
EPS - Basic (in usd per share) |  | $ 8.84 | $ 0.63
EPS - Diluted (in usd per share) |  | $ 8.48 | $ 0.62
Fiscal 2020 Acquisitions |  |  |
Revenues |  |  | $ 1,339,927
Net income from continuing operations |  |  | $ 21,450
EPS - Basic (in usd per share) |  |  | $ 0.46
EPS - Diluted (in usd per share) |  |  | $ 0.45
RetailMeNot, Inc. |  |  |
Revenues |  |  | $ 1,308,731
Net income from continuing operations |  |  | $ 23,395
EPS - Basic (in usd per share) |  |  | $ 0.50
EPS - Diluted (in usd per share) |  |  | $ 0.49

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