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Disclosure about Segments of an Enterprise and Geographic Areas (Schedule of Revenues by Geographic Regions) (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended
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Mar. 31, 2015 | Mar. 31, 2014 | Mar. 31, 2015 | Mar. 31, 2014
Segment Reporting Information [Line Items] |  |  |  |
Net Revenues | $ 119,590 us-gaap_SalesRevenueNet | $ 141,762 us-gaap_SalesRevenueNet | $ 403,072 us-gaap_SalesRevenueNet | $ 364,261 us-gaap_SalesRevenueNet
Total Americas |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net Revenues | 56,426 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = us-gaap_AmericasMember | 71,978 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = us-gaap_AmericasMember | 192,991 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = us-gaap_AmericasMember | 179,392 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = us-gaap_AmericasMember
United States |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net Revenues | 49,353 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = country_US | 59,896 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = country_US | 166,001 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = country_US | 141,576 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = country_US
Other |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net Revenues | 7,073 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = extr_OtherAmericasMember | 12,082 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = extr_OtherAmericasMember | 26,990 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = extr_OtherAmericasMember | 37,816 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = extr_OtherAmericasMember
EMEA |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net Revenues | 50,006 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = us-gaap_EMEAMember | 54,113 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = us-gaap_EMEAMember | 166,515 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = us-gaap_EMEAMember | 146,175 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = us-gaap_EMEAMember
APAC |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net Revenues | $ 13,158 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = us-gaap_AsiaPacificMember | $ 15,671 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = us-gaap_AsiaPacificMember | $ 43,566 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = us-gaap_AsiaPacificMember | $ 38,694 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = us-gaap_AsiaPacificMember

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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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