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SELLING, GENERAL AND ADMINISTRATIVE EXPENSES (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Selling, General and Administrative Expense [Abstract]      
Compensation and benefits $ 35,521 $ 49,875 $ 51,043
Occupancy related costs 19,363 26,042 30,851
Amortization of intangible assets 14,720 19,021 28,412
Professional services 11,444 14,975 16,950
Marketing costs 3,325 11,212 14,707
Depreciation and amortization 2,580 4,788 6,786
Other 5,783 15,163 26,921
Total $ 92,736 $ 141,076 $ 175,670