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LEASES - Lease Cost (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2021
USD ($)
office_space
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Leases [Abstract]      
Operating lease cost $ 15,449 $ 13,957 $ 11,330
Finance lease cost      
Amortization of ROU assets 3 18 0
Interest on lease liabilities 1 5 0
Short-term lease cost 3,662 2,058 8,169
Variable lease cost 56 (186) 259
Sublease Income (367) (358) (348)
Total lease cost 18,804 15,494 19,410
Office rent expense $ 2,200 $ 1,100 $ 1,100
Number of office spaces subleased | office_space 1