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Business Combinations and Other Transactions - Pro Forma Information (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Actual revenue | $ 72,523 |  |  | $ 75,079 |  |  | $ 216,763 | $ 232,078
Actual earnings | $ 2,234 | $ 7,743 | $ (2,803) | $ 21,752 | $ 10,966 | $ 30,230 | $ 7,174 | $ 62,948
Actual diluted earnings per share (in usd per share) | $ 0.07 |  |  | $ 0.61 |  |  | $ 0.22 | $ 1.77
Technicolor |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Supplemental pro forma revenue |  |  |  | $ 76,034 |  |  |  | $ 238,761
Supplemental pro forma earnings |  |  |  | $ 22,884 |  |  |  | $ 55,314
Actual diluted earnings per share (in usd per share) |  |  |  |  |  |  |  | $ 1.77
Supplemental pro forma diluted earnings per share (in usd per share) |  |  |  | $ 0.64 |  |  |  | $ 1.55

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