ACCOUNTING POLICIES ACCOUNTING POLICIES - Allowance for Sales Returns Rollforward (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2019	Dec. 31, 2018
Accounting Policies [Abstract]
Allowance for returns	$ 11,036	$ 15,261
Revenue Recognition, Sales Returns, Reserve for Sales Returns	31,768
Deductions From Sales Returns, Current	$ (35,993)

Amount of estimated sales returns.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=84158767&loc=d3e18780-107790

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 605
-SubTopic 15
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=68051624&loc=d3e47468-111626

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