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RELATED PARTY TRANSACTIONS (Schedule of Recognized Revenue and Cost of Net Sales for Sales of Telecommunications Equipment and Services to Affiliates of Softbank) (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Related party transactions [Line Items] |  |  |
Net sales | $ 129,420 us-gaap_SalesRevenueNet | $ 164,439 us-gaap_SalesRevenueNet | $ 186,728 us-gaap_SalesRevenueNet
Gross profit | 22,128 us-gaap_GrossProfit | 40,220 us-gaap_GrossProfit | 68,158 us-gaap_GrossProfit
Softbank and affiliates [Member] |  |  |
Related party transactions [Line Items] |  |  |
Net sales |  | 90,302 us-gaap_SalesRevenueNet / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_MajorityShareholderMember | 92,011 us-gaap_SalesRevenueNet / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_MajorityShareholderMember
Cost of net sales |  | 59,052 us-gaap_CostOfGoodsAndServicesSold / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_MajorityShareholderMember | 51,448 us-gaap_CostOfGoodsAndServicesSold / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_MajorityShareholderMember
Gross profit |  | $ 31,250 us-gaap_GrossProfit / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_MajorityShareholderMember | $ 40,563 us-gaap_GrossProfit / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_MajorityShareholderMember

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- Definition The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 2 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.2(a),(d)) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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- Definition Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 + Details
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