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INTANGIBLE ASSETS (Tables)
 9 Months Ended
Sep. 30, 2021
Intangible Assets, Net (Excluding Goodwill) [Abstract]  
Schedule of Acquired Finite-Lived Intangible Assets by Major Class
Intangible assets consist of the following (in thousands, except amortization period data):
September 30,
2021		December 31,
2020		Weighted-
Average
Amortization
Period (in years)
Acquired technology and data$131,729 $131,551 5
Accumulated amortization(103,581)(97,791) 
Acquired technology and data, net28,148 33,760  
Acquired customer base612,092 545,643 10
Accumulated amortization(351,478)(296,758) 
Acquired customer base, net260,614 248,885  
Acquired trade names and other intangible assets283,294 249,465 12
Accumulated amortization(124,156)(105,365) 
Acquired trade names and other intangible assets, net159,138 144,100  
Intangible assets, net
$447,900 $426,745