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VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Allowance for Doubtful Accounts [Member] |  |  |  |
Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |  |
Balance at beginning of period |  | $ 6,952 | $ 8,530 | $ 8,713
Charge to expense |  | 1,388 | 23 | 744
Other | [1] | (421) | (1,601) | (927)
Balance at end of the period |  | 7,919 | 6,952 | 8,530
Allowance for Sales Returns [Member] |  |  |  |
Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |  |
Balance at beginning of period |  | 13,714 | 14,024 | 17,265
Charge to expense |  | 8,909 | 10,851 | 10,640
Other | [1] | (11,253) | (11,161) | (13,881)
Balance at end of the period |  | 11,370 | 13,714 | 14,024
Valuation Allowance Deferred Tax Assets [Member] |  |  |  |
Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |  |
Balance at beginning of period |  | 22,821 | 24,439 | 21,860
Charge to expense |  | (3,552) | (88) | 75
Other | [1] | (3,212) | (1,530) | 2,504
Balance at end of the period |  | $ 16,057 | $ 22,821 | $ 24,439
[1] | Amounts sold, written off, or recovered, and the effect of changes in currency translation rates, are included in Column D.

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- Definition Total of allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 + Details
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