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Net income per share attributable to common stockholders - Basic and Diluted Net Income per Share Attributable to Common Stockholders (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified | 3 Months Ended
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Mar. 31, 2015 | Mar. 31, 2014
Numerator: |  |
Allocation of net income | $ 16,752 us-gaap_NetIncomeLoss | $ 11,049 us-gaap_NetIncomeLoss
Less: net income allocable to participating securities | 0 us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic | (3,040)us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic
Net income attributable to common stockholders—basic | 16,752 us-gaap_UndistributedEarnings | 8,009 us-gaap_UndistributedEarnings
Add: net income allocable to dilutive participating securities | 0 us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted | 443 us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted
Net income attributable to common stockholders—diluted | 16,752 us-gaap_UndistributedEarningsDiluted | 8,452 us-gaap_UndistributedEarningsDiluted
Denominator: |  |
Weighted-average common shares—basic (in shares) | 132,278 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 81,582 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Weighted-average common shares—diluted (in shares) | 148,573 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 100,783 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding
Net income per share attributable to common stockholders - Basic (in dollars per share) | $ 0.13 us-gaap_EarningsPerShareBasic | $ 0.10 us-gaap_EarningsPerShareBasic
Net income per share attributable to common stockholders - Diluted (in dollars per share) | $ 0.11 us-gaap_EarningsPerShareDiluted | $ 0.08 us-gaap_EarningsPerShareDiluted
Class A [Member] |  |
Numerator: |  |
Allocation of net income | 8,926 us-gaap_NetIncomeLoss / us-gaap_StatementClassOfStockAxis = gpro_ClassAMember |
Less: net income allocable to participating securities | 0 us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic / us-gaap_StatementClassOfStockAxis = gpro_ClassAMember |
Net income attributable to common stockholders—basic | 8,926 us-gaap_UndistributedEarnings / us-gaap_StatementClassOfStockAxis = gpro_ClassAMember |
Add: net income allocable to dilutive participating securities | 0 us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted / us-gaap_StatementClassOfStockAxis = gpro_ClassAMember |
Reallocation of net income | 7,826 gpro_ReallocationOfUndistributedEarningsAsResultOfConversion / us-gaap_StatementClassOfStockAxis = gpro_ClassAMember |
Net income attributable to common stockholders—diluted | 16,752 us-gaap_UndistributedEarningsDiluted / us-gaap_StatementClassOfStockAxis = gpro_ClassAMember |
Denominator: |  |
Weighted-average common shares—basic (in shares) | 70,483 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / us-gaap_StatementClassOfStockAxis = gpro_ClassAMember |
Conversion of Class B to Class A common stock outstanding (in shares) | 61,795 gpro_Incrementalcommonsharesattributabletoconversionofcommonstock / us-gaap_StatementClassOfStockAxis = gpro_ClassAMember |
Effect of potentially dilutive stock options, ESPP shares and RSUs (in shares) | 16,295 us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements / us-gaap_StatementClassOfStockAxis = gpro_ClassAMember |
Weighted-average common shares—diluted (in shares) | 148,573 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding / us-gaap_StatementClassOfStockAxis = gpro_ClassAMember |
Net income per share attributable to common stockholders - Basic (in dollars per share) | $ 0.13 us-gaap_EarningsPerShareBasic / us-gaap_StatementClassOfStockAxis = gpro_ClassAMember |
Net income per share attributable to common stockholders - Diluted (in dollars per share) | $ 0.11 us-gaap_EarningsPerShareDiluted / us-gaap_StatementClassOfStockAxis = gpro_ClassAMember |
Class B [Member] |  |
Numerator: |  |
Allocation of net income | 7,826 us-gaap_NetIncomeLoss / us-gaap_StatementClassOfStockAxis = gpro_ClassBMember |
Less: net income allocable to participating securities | 0 us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic / us-gaap_StatementClassOfStockAxis = gpro_ClassBMember |
Net income attributable to common stockholders—basic | 7,826 us-gaap_UndistributedEarnings / us-gaap_StatementClassOfStockAxis = gpro_ClassBMember |
Add: net income allocable to dilutive participating securities | 0 us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted / us-gaap_StatementClassOfStockAxis = gpro_ClassBMember |
Reallocation of net income | 968 gpro_ReallocationOfUndistributedEarningsAsResultOfConversion / us-gaap_StatementClassOfStockAxis = gpro_ClassBMember |
Net income attributable to common stockholders—diluted | 8,794 us-gaap_UndistributedEarningsDiluted / us-gaap_StatementClassOfStockAxis = gpro_ClassBMember |
Denominator: |  |
Weighted-average common shares—basic (in shares) | 61,795 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / us-gaap_StatementClassOfStockAxis = gpro_ClassBMember |
Conversion of Class B to Class A common stock outstanding (in shares) | 0 gpro_Incrementalcommonsharesattributabletoconversionofcommonstock / us-gaap_StatementClassOfStockAxis = gpro_ClassBMember |
Effect of potentially dilutive stock options, ESPP shares and RSUs (in shares) | 16,202 us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements / us-gaap_StatementClassOfStockAxis = gpro_ClassBMember |
Weighted-average common shares—diluted (in shares) | 77,997 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding / us-gaap_StatementClassOfStockAxis = gpro_ClassBMember |
Net income per share attributable to common stockholders - Basic (in dollars per share) | $ 0.13 us-gaap_EarningsPerShareBasic / us-gaap_StatementClassOfStockAxis = gpro_ClassBMember |
Net income per share attributable to common stockholders - Diluted (in dollars per share) | $ 0.11 us-gaap_EarningsPerShareDiluted / us-gaap_StatementClassOfStockAxis = gpro_ClassBMember |
Common [Member] |  |
Numerator: |  |
Allocation of net income |  | 11,049 us-gaap_NetIncomeLoss / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember
Less: net income allocable to participating securities |  | (3,040)us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember
Net income attributable to common stockholders—basic |  | 8,009 us-gaap_UndistributedEarnings / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember
Add: net income allocable to dilutive participating securities |  | 443 us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember
Net income attributable to common stockholders—diluted |  | $ 8,452 us-gaap_UndistributedEarningsDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember
Denominator: |  |
Weighted-average common shares—basic (in shares) |  | 81,582 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember
Conversion of Class B to Class A common stock outstanding (in shares) |  | 0 gpro_Incrementalcommonsharesattributabletoconversionofcommonstock / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember
Effect of potentially dilutive stock options, ESPP shares and RSUs (in shares) |  | 19,201 us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember
Weighted-average common shares—diluted (in shares) |  | 100,783 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember
Net income per share attributable to common stockholders - Basic (in dollars per share) |  | $ 0.10 us-gaap_EarningsPerShareBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember
Net income per share attributable to common stockholders - Diluted (in dollars per share) |  | $ 0.08 us-gaap_EarningsPerShareDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember

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