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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 | 6 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2014 | Dec. 31, 2013
Segment Reporting Information [Line Items] |  |  |  |
Net Revenues | $ 147,208 us-gaap_SalesRevenueNet | $ 146,583 us-gaap_SalesRevenueNet | $ 283,482 us-gaap_SalesRevenueNet | $ 222,498 us-gaap_SalesRevenueNet
Total Americas |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net Revenues | 70,736 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = us-gaap_AmericasMember | 70,205 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = us-gaap_AmericasMember | 136,565 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = us-gaap_AmericasMember | 101,895 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = us-gaap_AmericasMember
United States |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net Revenues | 58,160 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = country_US | 56,292 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = country_US | 116,648 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = country_US | 81,681 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = country_US
Other |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net Revenues | 12,576 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = extr_OtherAmericasMember | 13,913 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = extr_OtherAmericasMember | 19,917 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = extr_OtherAmericasMember | 20,214 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = extr_OtherAmericasMember
EMEA |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net Revenues | 62,574 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = us-gaap_EMEAMember | 61,292 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = us-gaap_EMEAMember | 116,509 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = us-gaap_EMEAMember | 92,133 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = us-gaap_EMEAMember
APAC |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net Revenues | $ 13,898 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = us-gaap_AsiaPacificMember | $ 15,086 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = us-gaap_AsiaPacificMember | $ 30,408 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = us-gaap_AsiaPacificMember | $ 28,470 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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