XML 25 R11.htm IDEA: XBRL DOCUMENT v3.22.0.1
Goodwill and Intangible Assets
 12 Months Ended
Dec. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and Intangible Assets Goodwill and Intangible Assets
Goodwill. The table below presents changes to the carrying amount of goodwill by segment during the two-year period ended December 31, 2021 (in thousands).
 ResearchConferencesConsultingTotal
Balance at December 31, 2019 (1)$2,651,060 $189,641 $97,025 $2,937,726 
Foreign currency translation impact13,672 (5,550)(301)7,821 
Balance at December 31, 2020 (1)2,664,732 184,091 96,724 2,945,547 
Additions due to an acquisition (2)11,486 — — 11,486 
Foreign currency translation impact(5,284)(70)(362)(5,716)
Balance at December 31, 2021 (1)$2,670,934 $184,021 $96,362 $2,951,317 
(1)The Company does not have any accumulated goodwill impairment losses.
(2)The additions were due to the acquisition of Pulse on June 17, 2021. See Note 2 — Acquisitions for additional information.
Finite-lived intangible assets. Changes in finite-lived intangible assets during the two-year period ended December 31, 2021 are presented in the tables below (in thousands).
December 31, 2021Customer
Relationships		Technology-relatedContentOther Total
Gross cost at December 31, 2020$1,154,210 $110,597 $3,965 $10,614 $1,279,386 
Additions due to an acquisition (1)7,980 11,200 — 320 19,500 
Intangible assets fully amortized(61,422)(60,685)(3,965)(498)(126,570)
Foreign currency translation impact(4,410)104 — — (4,306)
Gross cost1,096,358 61,216 — 10,436 1,168,010 
Accumulated amortization (2)(413,266)(35,727)— (4,599)(453,592)
Balance at December 31, 2021$683,092 $25,489 $— $5,837 $714,418 
December 31, 2020Customer
Relationships		Technology-relatedContentOther Total
Gross cost at December 31, 2019$1,145,109 $111,033 $14,140 $30,838 $1,301,120 
Intangible assets fully amortized(2,394)(787)(9,929)(20,152)(33,262)
Foreign currency translation impact 11,495 351 (246)(72)11,528 
Gross cost1,154,210 110,597 3,965 10,614 1,279,386 
Accumulated amortization (2)(381,776)(83,320)(3,595)(3,697)(472,388)
Balance at December 31, 2020$772,434 $27,277 $370 $6,917 $806,998 
(1)The additions were due to the acquisition of Pulse on June 17, 2021. See Note 2 — Acquisitions for additional information.
(2)Finite-lived intangible assets are amortized using the straight-line method over the following periods: Customer relationships—6 to 13 years; Technology-related—3 to 7 years; Content—2 to 3 years; and Other —2 to 11 years.

Amortization expense related to finite-lived intangible assets was $109.6 million, $125.1 million and $129.7 million in 2021, 2020 and 2019, respectively. The estimated future amortization expense by year for finite-lived intangible assets is presented in the table below (in thousands).
2022$100,687 
2023100,672 
202493,479 
202582,946 
202680,271 
2027 and thereafter256,363 
 $714,418