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Concentrations of risk and segment information - Narrative (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014 country
Risks and Uncertainties [Abstract]
Accounts receivable sold during the period	$ 35,300,000us-gaap_FinancingReceivableSignificantSales	$ 31,300,000us-gaap_FinancingReceivableSignificantSales
Factoring fees	300,000us-gaap_GainLossOnSaleOfAccountsReceivable	300,000us-gaap_GainLossOnSaleOfAccountsReceivable
Revenue, Major Customer [Line Items]
Revenue	363,109,000us-gaap_Revenues	235,716,000us-gaap_Revenues
United States [Member]
Revenue, Major Customer [Line Items]
Revenue	155,300,000us-gaap_Revenues / us-gaap_StatementGeographicalAxis = country_US	110,700,000us-gaap_Revenues / us-gaap_StatementGeographicalAxis = country_US
Formerly APAC to EMEA Region [Member]
Revenue, Major Customer [Line Items]
Revenue		4,100,000us-gaap_Revenues / us-gaap_StatementGeographicalAxis = gpro_FormerlyAPACtoEMEARegionMember
Number of countries previously included in the APAC region			4us-gaap_NumberOfCountriesInWhichEntityOperates / us-gaap_StatementGeographicalAxis = gpro_FormerlyAPACtoEMEARegionMember
Outside the United States [Member]
Revenue, Major Customer [Line Items]
Long-lived assets	$ 28,800,000us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = gpro_OutsideUnitedStatesMember		25,400,000us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = gpro_OutsideUnitedStatesMember

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- Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

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- Definition

The amount of any significant sales of financing receivables during the reporting period.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 11B

-Subparagraph (f)

-URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953423-111524

+ Details

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Period Type:	duration

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- Definition

Reflects the net positive or negative amount derived from subtracting from net proceeds of sale, the carrying amounts, net of allocated reserves, of accounts receivable transferred to a third party in a transaction that qualifies for sales treatment.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 860

-SubTopic 20

-Section 50

-Paragraph 5

-URI http://asc.fasb.org/extlink&oid=13989330&loc=d3e107425-111719

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- Definition

Long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 280

-SubTopic 10

-Section 50

-Paragraph 41

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e9038-108599

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The number of countries in which the entity operates as of balance sheet date.

+ References

No definition available.

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- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ 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

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