XML 76 R66.htm IDEA: XBRL DOCUMENT v3.21.2
ACQUIRED INTANGIBLE ASSETS - Change in Carrying Value of Acquired Intangible Assets (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Finite-lived Intangible Assets [Roll Forward]        
Acquired intangible assets, net, beginning of the period $ 262,196 $ 99,802 $ 137,612 $ 69,079
Acquisitions 18,100 12,100 159,100 51,109
Amortization expense (11,140) (5,236) (27,258) (13,522)
Other (464) 896 (762) 896
Acquired intangible assets, net, end of the period $ 268,692 $ 107,562 $ 268,692 $ 107,562