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Segment Information (Reconciliation of Total Segment Operating Income to Consolidated Operating Income) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | $ 353,580 | $ 340,985 | $ 988,865 | $ 974,143
Total operating costs and expenses | 382,884 | 354,304 | 953,739 | 922,252
(Loss) income from operations | (29,304) | (13,319) | 35,126 | 51,891
Reportable segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 353,580 | 340,985 | 988,865 | 974,143
Total operating costs and expenses | 363,441 | 341,380 | 901,146 | 884,233
(Loss) income from operations | (9,861) | (395) | 87,719 | 89,910
Elimination of inter-segment operating expenses |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | (26) | (17) | (46) | (152)
Total operating costs and expenses | (26) | (17) | (46) | (152)
Corporate |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Total operating costs and expenses | 19,443 | 12,924 | 52,593 | 38,019
(Loss) income from operations | (19,443) | (12,924) | (52,593) | (38,019)
Digital Media | Reportable segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 283,567 | 267,951 | 774,436 | 755,032
Total operating costs and expenses | 308,309 | 280,856 | 732,554 | 702,752
(Loss) income from operations | (24,742) | (12,905) | 41,882 | 52,280
Cybersecurity and Martech operating income | Reportable segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 70,039 | 73,051 | 214,475 | 219,263
Total operating costs and expenses | 55,158 | 60,541 | 168,638 | 181,633
(Loss) income from operations | $ 14,881 | $ 12,510 | $ 45,837 | $ 37,630

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