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INCOME TAXES (Other - Narrative) (Details) | 12 Months Ended | 36 Months Ended | 48 Months Ended
--- | --- | --- | ---
Dec. 31, 2014 | Dec. 31, 2010 | Dec. 31, 2014
U.S. [Member] |  |  |
INCOME TAXES [Line Items] |  |  |
Statutory tax rate (as a percent) | 35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate / utsi_AllCountriesAxis = country_US |  |
China [Member] |  |  |
INCOME TAXES [Line Items] |  |  |
Statutory tax rate (as a percent) | 25.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate / utsi_AllCountriesAxis = country_CN |  |
Reduced tax rate for qualified high technology enterprises (as a percent) | 15.00%utsi_ReducedIncomeTaxRateApplicableToHighAndNewTechnologyEnterprise / utsi_AllCountriesAxis = country_CN |  |
Number of subsidiaries approved for the reduced tax rate | 1 utsi_NumberOfSubsidiariesApprovedForReducedTaxRate / utsi_AllCountriesAxis = country_CN |  |
China [Member] | HUTS [Member] |  |  |
INCOME TAXES [Line Items] |  |  |
Reduced tax rate for qualified high technology enterprises (as a percent) |  | 15.00%utsi_ReducedIncomeTaxRateApplicableToHighAndNewTechnologyEnterprise / utsi_AllCountriesAxis = country_CN / dei_LegalEntityAxis = utsi_UTStarcomTelecomCoLtdMember | 15.00%utsi_ReducedIncomeTaxRateApplicableToHighAndNewTechnologyEnterprise / utsi_AllCountriesAxis = country_CN / dei_LegalEntityAxis = utsi_UTStarcomTelecomCoLtdMember
Valid period for reduced income tax rate applicable to qualified high technology enterprise |  | 3 years | 3 years

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- Definition Percentage of domestic federal statutory tax rate applicable to pretax income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 6.I) -URI http://asc.fasb.org/extlink&oid=34349781&loc=d3e330036-122817 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32698-109319 + Details
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