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Summary of Operations and Significant Accounting Policies (Details 5) (USD $) In Thousands, unless otherwise specified | 9 Months Ended |
--- | --- | ---
Sep. 30, 2014 item | Dec. 31, 2013
Revenue recognition |  |
Number of subscription or usage based plans | 3 |
Chargeback and sales refund allowances | $ 595 | $ 425
Period of revenue recognition for undelivered elements | 1 year |
Estimated customer relationship period | 3 years |
Subscription plans | Minimum |  |
Revenue recognition |  |
Plan term | 30 days |
Subscription plans | Maximum |  |
Revenue recognition |  |
Plan term | 1 year |
On Demand plans |  |
Revenue recognition |  |
Plan term | 1 year |
Credit-pack plans |  |
Revenue recognition |  |
Plan term | 1 year |

X
- Definition Represents the amount of chargeback and sales refund allowance included in other liabilities at the balance sheet date. + References No definition available. + Details
Name: | sstk_ChargebackAndSalesRefundAllowance
Namespace Prefix: | sstk_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents the contractual period for revenue recognition of undelivered elements. + References No definition available. + Details
Name: | sstk_ContractualPeriodForRevenueRecognitionOfUndeliveredElements
Namespace Prefix: | sstk_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the estimated customer relationship period for revenue deferred. + References No definition available. + Details
Name: | sstk_EstimatedCustomerRelationshipPeriod
Namespace Prefix: | sstk_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the number of subscription or usage based plans. + References No definition available. + Details
Name: | sstk_NumberOfSubscriptionOrUsageBasedPlans
Namespace Prefix: | sstk_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the term of subscription or usage based plans. + References No definition available. + Details
Name: | sstk_PlanTerm
Namespace Prefix: | sstk_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_RevenueRecognitionMultipleDeliverableArrangementsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration