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Acquisitions Acquisitions (Intangible Assets Acquired) (Details) (Doremi Labs [Member], USD $) In Thousands, unless otherwise specified | 0 Months Ended
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Oct. 31, 2014
Acquired Finite-Lived Intangible Assets [Line Items] |
Purchase Price Allocation | $ 45,600 us-gaap_FinitelivedIntangibleAssetsAcquired1
Customer Relationships [Member] |
Acquired Finite-Lived Intangible Assets [Line Items] |
Purchase Price Allocation | 25,600 us-gaap_FinitelivedIntangibleAssetsAcquired1 / us-gaap_BusinessAcquisitionAxis = dlb_DoremiLabsMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CustomerRelationshipsMember
Weighted average useful life | 10 years
Developed Technology [Member] |
Acquired Finite-Lived Intangible Assets [Line Items] |
Purchase Price Allocation | 17,500 us-gaap_FinitelivedIntangibleAssetsAcquired1 / us-gaap_BusinessAcquisitionAxis = dlb_DoremiLabsMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_DevelopedTechnologyRightsMember
Weighted average useful life | 7 years 6 months
Trade Name [Member] |
Acquired Finite-Lived Intangible Assets [Line Items] |
Purchase Price Allocation | 1,300 us-gaap_FinitelivedIntangibleAssetsAcquired1 / us-gaap_BusinessAcquisitionAxis = dlb_DoremiLabsMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TradeNamesMember
Weighted average useful life | 1 year
Backlog [Member] |
Acquired Finite-Lived Intangible Assets [Line Items] |
Purchase Price Allocation | $ 1,200 us-gaap_FinitelivedIntangibleAssetsAcquired1 / us-gaap_BusinessAcquisitionAxis = dlb_DoremiLabsMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_OrderOrProductionBacklogMember
Weighted average useful life | 1 year

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- Definition Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16265-109275 + Details
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- Definition Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, resulting from a business combination. + References No definition available. + Details
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Period Type: | duration