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GOODWILL AND OTHER INTANGIBLE ASSETS (Tables)
3 Months Ended
Mar. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]  
Changes in Carrying Amount of Goodwill
Change in goodwill:
Three Months Ended
March 31,
(in thousands)
20212020
January 1,$79,231 $79,039 
Acquisition2,701 — 
Currency translation adjustments105 (541)
March 31,$82,037 $78,498 
Schedule of Amortizable Intangible Assets
Intangible assets are recorded at cost and amortized using the straight-line method over their estimated useful lives.
March 31, 2021
(in thousands)Useful LivesCostAccumulated Amortization
Net Book Value (1)
Client-related
4-10 years
$63,180 $(56,260)$6,920 
Technology
2-10 years
67,142 (57,014)10,128 
Other
1-5 years
5,361 (5,361)— 
$135,683 $(118,635)$17,048 
(1) Included in other long-term assets.
December 31, 2020
(in thousands)Useful LivesCostAccumulated Amortization
Net Book Value (1)
Client-related
4-10 years
$63,168 $(55,877)$7,291 
Technology
2-10 years
64,843 (56,386)8,457 
Other
1-5 years
5,361 (5,361)— 
$133,372 $(117,624)$15,748 
(1) Included in other long-term assets.
Amortization Expense of Acquired Intangibles
Amortization of intangible assets:
Three Months Ended
March 31,
(in thousands)20212020
Cost of revenue
$629 $647 
Selling and marketing
373 371 
$1,002 $1,018 
Estimated Future Amortization Expense Related to Intangible Assets
Future estimated intangibles assets amortization:
(in thousands)
March 31, 2021
2021$2,985 
20223,886 
20233,618 
20242,849 
20252,509 
2026 and thereafter1,201 
$17,048