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v3.23.1

Operating Segments - Schedule of Information by Reportable Segment (Detail) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2023 | Mar. 31, 2022
Segment Reporting Information [Line Items] |  |
Total revenues | $ 113,670 | $ 124,971
Segment expenses | 49,491 | 50,248
Selling, marketing, administrative and other expenses | (64,664) | (64,890)
Amortization of intangible assets | (3,066) | (3,362)
Restructuring costs | (1,589) | 0
Interest expense, other income (expense), and gains on investments | 243 | (444)
Income (Loss) before income taxes | (5,383) | 6,027
Research Segment [Member] |  |
Segment Reporting Information [Line Items] |  |
Total revenues | 88,825 | 96,970
Segment expenses | 35,507 | 34,180
Consulting Segment Member |  |
Segment Reporting Information [Line Items] |  |
Total revenues | 23,831 | 27,241
Segment expenses | 12,353 | 14,317
Events Segment [Member] |  |
Segment Reporting Information [Line Items] |  |
Total revenues | 1,014 | 760
Segment expenses | 1,631 | 1,751
Research [Member] |  |
Segment Reporting Information [Line Items] |  |
Total revenues | 80,906 | 85,780
Research [Member] | Research Segment [Member] |  |
Segment Reporting Information [Line Items] |  |
Total revenues | 80,906 | 85,780
Research [Member] | Consulting Segment Member |  |
Segment Reporting Information [Line Items] |  |
Total revenues | 0 | 0
Research [Member] | Events Segment [Member] |  |
Segment Reporting Information [Line Items] |  |
Total revenues | 0 | 0
Consulting [Member] |  |
Segment Reporting Information [Line Items] |  |
Total revenues | 31,750 | 38,431
Consulting [Member] | Research Segment [Member] |  |
Segment Reporting Information [Line Items] |  |
Total revenues | 7,919 | 11,190
Consulting [Member] | Consulting Segment Member |  |
Segment Reporting Information [Line Items] |  |
Total revenues | 23,831 | 27,241
Consulting [Member] | Events Segment [Member] |  |
Segment Reporting Information [Line Items] |  |
Total revenues | 0 | 0
Events [Member] |  |
Segment Reporting Information [Line Items] |  |
Total revenues | 1,014 | 760
Events [Member] | Research Segment [Member] |  |
Segment Reporting Information [Line Items] |  |
Total revenues | 0 | 0
Events [Member] | Consulting Segment Member |  |
Segment Reporting Information [Line Items] |  |
Total revenues | 0 | 0
Events [Member] | Events Segment [Member] |  |
Segment Reporting Information [Line Items] |  |
Total revenues | $ 1,014 | $ 760

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