VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Allowance for Doubtful Accounts [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of period		$ 7,919	$ 6,952	$ 8,530
Charge to expense		579	1,388	23
Other	[1]	(1,161)	(421)	(1,601)
Balance at end of the period		7,337	7,919	6,952
Allowance for Sales Returns [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of period		11,370	13,714	14,024
Charge to expense		8,372	8,909	10,851
Other	[1]	(8,399)	(11,253)	(11,161)
Balance at end of the period		11,343	11,370	13,714
Valuation Allowance Deferred Tax Assets [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of period		16,057	22,821	24,439
Charge to expense		(4,882)	(3,552)	(88)
Other	[1]	(2,786)	(3,212)	(1,530)
Balance at end of the period		$ 8,389	$ 16,057	$ 22,821

[1] Amounts sold, written off, or recovered, and the effect of changes in currency translation rates, are included in Column D.