v3.26.1
Goodwill and Intangible Assets (Tables)
 6 Months Ended
Jun. 30, 2026
Intangible Asset, Goodwill and Other [Abstract]  
Schedule of Changes to the Carrying Amount of Goodwill by Segment
The table below presents changes to the carrying amount of goodwill by segment during the six months ended June 30, 2026 (in thousands).
InsightsConferencesConsultingTotal
Balance at December 31, 2025 $2,460,315 $184,052 $96,435 $2,740,802 
Foreign currency translation impact (1,833)(36)(302)(2,171)
Balance at June 30, 2026 $2,458,482 $184,016 $96,133 $2,738,631 
Schedule of Amortizable Intangible Assets
The tables below present reconciliations of the carrying amounts of the Company’s finite-lived intangible assets as of the dates indicated (in thousands).
June 30, 2026Customer
Relationships		OtherTotal
Gross cost at December 31, 2025$1,021,757 $10,200 $1,031,957 
Foreign currency translation impact (6,127)— (6,127)
Gross cost1,015,630 10,200 1,025,830 
Accumulated amortization (1)(722,687)(8,709)(731,396)
Balance at June 30, 2026$292,943 $1,491 $294,434 
December 31, 2025Customer
Relationships		Other Total
Gross cost $1,021,757 $10,200 $1,031,957 
Accumulated amortization (1)(687,416)(8,238)(695,654)
Balance at December 31, 2025$334,341 $1,962 $336,303 
(1) Finite-lived intangible assets are amortized using the straight-line method over the following periods: Customer relationships—6 to 13 years and Other—11 years.
Schedule of Estimated Future Amortization Expense by Year The estimated future amortization expense by year for finite-lived intangible assets is presented in the table below (in thousands).
2026 (remaining six months)$39,861 
202779,114 
202877,642 
202977,564 
203020,253 
$294,434