Quarterly report pursuant to Section 13 or 15(d)

GOODWILL AND INTANGIBLE ASSETS - Schedule of goodwill (Details)

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GOODWILL AND INTANGIBLE ASSETS - Schedule of goodwill (Details) - USD ($)
$ in Thousands
9 Months Ended 12 Months Ended
Sep. 30, 2021
Dec. 31, 2020
Goodwill [Roll Forward]    
Balance, beginning of period $ 62,951 $ 17,799
Goodwill additions and measurement period adjustments 60,924 45,152
Balance, end of period $ 123,875 $ 62,951