Quarterly report pursuant to Section 13 or 15(d)

FAIR VALUE OF FINANCIAL INSTRUMENTS - Level 3 (Details)

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FAIR VALUE OF FINANCIAL INSTRUMENTS - Level 3 (Details) - Recurring - Level 3 - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Beginning balance $ 27,057 $ 47,085 $ 35,744 $ 49,131
New acquisitions and revaluations 1,341 3,160 5,314 8,703
Payouts (6,540) (16,306) (19,413) (24,168)
Interest on outstanding contingencies 178 386 715 1,534
Charge offset, forfeit and other (514) (554) (838) (1,429)
Ending balance $ 21,522 $ 33,771 $ 21,522 $ 33,771