ACCRUED EXPENSES AND OTHER LIABILITIES (Schedule Of Accrued Expenses & Other Current Liabilities) (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Payables and Accruals [Abstract]
Accrued compensation and benefits	$ 18,689	$ 42,460
Fulfillment, freight, and duties	17,431	20,110
Professional services	15,321	13,361
Accrued rent and occupancy	5,318	4,682
Return liabilities	9,039	7,090
Sales/use and value added taxes payable	14,845	6,843
Royalties payable and deferred revenue	3,732	3,740
Other	9,858	10,391
Total accrued expenses and other liabilities	$ 94,233	$ 108,677