XML 26 R29.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Balance Sheet Accounts (Narratives) (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended | 0 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Dec. 31, 2012 Investment_Securities | Jan. 01, 2012 | Dec. 31, 2012 Investment_Securities | Jan. 01, 2012 | Dec. 31, 2012 Minimum | Dec. 31, 2012 Maximum | Dec. 31, 2012 Cash Equivalents Maximum | Dec. 31, 2012 Short-term Investments Minimum | Dec. 31, 2012 Short-term Investments Maximum | Dec. 31, 2012 Marketable Securities Minimum | Dec. 31, 2012 Available-for-sale Securities Government and Corporate Debt Securities | Sep. 11, 2012 Santa Clara Headquarters acre | Jun. 30, 2012 Customer Concentration Risk Accounts Receivable Minimum
Balance Sheet Accounts [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Maturity period for investments |  |  |  |  |  |  | 3 months | 3 months | 1 year | 1 year | 3 years |  |
Number of securities with unrealized losses | 13 |  | 13 |  |  |  |  |  |  |  |  |  |
Number of investment securities | 64 |  | 64 |  |  |  |  |  |  |  |  |  |
Number of acres of land sold |  |  |  |  |  |  |  |  |  |  |  | 16 |
Net cash proceeds from sale of real estate |  |  | $ 42,659 | $ 0 |  |  |  |  |  |  |  | $ 44,700 |
Gain on sale of property | 0 | 0 | 11,539 | 0 |  |  |  |  |  |  |  | 11,500 |
Amortization expense | $ 400 | $ 500 | $ 801 | $ 1,030 |  |  |  |  |  |  |  |  |
Extended warranty contracts period |  |  |  |  | 1 year | 5 years |  |  |  |  |  |  |
Standard hardware warranty period |  |  | 12 months |  |  |  |  |  |  |  |  |  |
Standard software warranty period |  |  | 90 days |  |  |  |  |  |  |  |  |  |
Limited lifetime hardware warranty maximum period after end of sale of product |  |  | 5 years |  |  |  |  |  |  |  |  |  |
Maximum investment in one obligor or maker (percent) |  |  | 10.00% |  |  |  |  |  |  |  |  |  |
Concentration risk |  |  |  |  |  |  |  |  |  |  |  |  | 10.00%

X
- Definition Available-for-sale, Number of Positions + References No definition available. + Details
Name: | extr_AvailableForSaleNumberOfPositions
Namespace Prefix: | extr_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | extr_BalanceSheetAccountsLineItems
Namespace Prefix: | extr_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Concentration Risk, Investment Policy in One Obligor or Maker, Percentage, Maximum + References No definition available. + Details
Name: | extr_ConcentrationRiskInvestmentPolicyInOneObligorOrMakerPercentageMaximum
Namespace Prefix: | extr_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Extended Warranty Contracts, Period + References No definition available. + Details
Name: | extr_ExtendedWarrantyContractsPeriod
Namespace Prefix: | extr_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Investment Maturity, Period + References No definition available. + Details
Name: | extr_InvestmentMaturityPeriod
Namespace Prefix: | extr_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Limited Lifetime Hardware Warranty, Maximum Period Following End of Product Sales + References No definition available. + Details
Name: | extr_LimitedLifetimeHardwareWarrantyMaximumPeriodFollowingEndOfProductSales
Namespace Prefix: | extr_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Standard Hardware Warranty, Period + References No definition available. + Details
Name: | extr_StandardHardwareWarrantyPeriod
Namespace Prefix: | extr_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Standard Software Warranty, Period + References No definition available. + Details
Name: | extr_StandardSoftwareWarrantyPeriod
Namespace Prefix: | extr_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 45 -Subparagraph a(2) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=7658586&loc=d3e16323-109275 + Details
Name: | us-gaap_AmortizationOfIntangibleAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Area of a real estate property. + References No definition available. + Details
Name: | us-gaap_AreaOfRealEstateProperty
Namespace Prefix: | us-gaap_
Data Type: | num:areaItemType
Balance Type: | na
Period Type: | instant

X
- Definition Disclosure regarding factors used to determine that the impairment of securities not categorized as either held-to-maturity securities or trading securities (hence equal to available for sale securities) where cost exceeds fair value is not an other than temporary impairment (OTTI). This item contains disclosure of the number of investment positions in the available-for-sale investments determined to be temporarily impaired. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (b)(3) -URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27290-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number 03-1 -Paragraph 21 -Subparagraph b(3) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number FAS115-1/124-1 -Paragraph 17 -Subparagraph b(3) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
Name: | us-gaap_AvailableForSaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions
Namespace Prefix: | us-gaap_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | instant

X
- 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 -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6351-108592 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13537-108611 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6404-108592 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13531-108611 + Details
Name: | us-gaap_ConcentrationRiskPercentage1
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The difference between the sale price or salvage price and the book value of a property, plant, and equipment asset that was sold or retired during the reporting period. This element refers to the gain (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585 + Details
Name: | us-gaap_GainLossOnSaleOfPropertyPlantEquipment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 16 -Subparagraph c -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 15 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3179-108585 + Details
Name: | us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration