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SEGMENT INFORMATION, REVENUES BY GEOGRAPHY AND SIGNIFICANT CUSTOMERS - Revenues by product (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2015	Mar. 31, 2014
Segment Reporting Information [Line Items]
Total revenues	$ 147,456us-gaap_SalesRevenueNet	$ 148,331us-gaap_SalesRevenueNet	$ 450,680us-gaap_SalesRevenueNet	$ 416,457us-gaap_SalesRevenueNet
Revenues
Segment Reporting Information [Line Items]
Revenue percentage	100.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember	100.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember	100.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember	100.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember
Service Provider Technology
Segment Reporting Information [Line Items]
Total revenues	106,242us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = ubnt_ServiceProviderTechnologyMember	120,987us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = ubnt_ServiceProviderTechnologyMember	313,233us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = ubnt_ServiceProviderTechnologyMember	326,658us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = ubnt_ServiceProviderTechnologyMember
Service Provider Technology | Revenues
Segment Reporting Information [Line Items]
Revenue percentage	72.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember / us-gaap_StatementBusinessSegmentsAxis = ubnt_ServiceProviderTechnologyMember	82.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember / us-gaap_StatementBusinessSegmentsAxis = ubnt_ServiceProviderTechnologyMember	70.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember / us-gaap_StatementBusinessSegmentsAxis = ubnt_ServiceProviderTechnologyMember	78.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember / us-gaap_StatementBusinessSegmentsAxis = ubnt_ServiceProviderTechnologyMember
Enterprise Technology
Segment Reporting Information [Line Items]
Total revenues	$ 41,214us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = ubnt_EnterpriseTechnologyMember	$ 27,344us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = ubnt_EnterpriseTechnologyMember	$ 137,447us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = ubnt_EnterpriseTechnologyMember	$ 89,799us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = ubnt_EnterpriseTechnologyMember
Enterprise Technology | Revenues
Segment Reporting Information [Line Items]
Revenue percentage	28.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember / us-gaap_StatementBusinessSegmentsAxis = ubnt_EnterpriseTechnologyMember	18.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember / us-gaap_StatementBusinessSegmentsAxis = ubnt_EnterpriseTechnologyMember	30.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember / us-gaap_StatementBusinessSegmentsAxis = ubnt_EnterpriseTechnologyMember	22.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember / us-gaap_StatementBusinessSegmentsAxis = ubnt_EnterpriseTechnologyMember

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- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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