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SELLING, GENERAL AND ADMINISTRATIVE EXPENSES (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Selling, General and Administrative Expense [Abstract]    
Compensation and benefits $ 7,852 $ 12,012
Professional services 3,218 2,635
Occupancy related costs 3,180 5,421
Amortization of intangible assets 2,599 4,209
Marketing costs 474 1,437
Depreciation and amortization 384 669
Other 1,179 1,710
Total $ 18,886 $ 28,093