Represents the amount which mobilized through fraudulent vouchers during the period.

No definition available.

Name:	inwk_FraudulentInvoiceAmount
Namespace Prefix:	inwk_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Represents the amount of maximum damages payable as a contingent consideration.

No definition available.

Name:	inwk_LossContingencyDamagesMaximumContingentConsideration
Namespace Prefix:	inwk_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Represents the amount of damages paid as a contingent consideration.

No definition available.

Name:	inwk_LossContingencyDamagesValueContingentConsideration
Namespace Prefix:	inwk_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Represents the amount of partial refund received in connection with Earn out consideration.

No definition available.

Name:	inwk_LossContingencyDamagesValueContingentConsiderationPartialRefund
Namespace Prefix:	inwk_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Represents the amount of damages paid as a contingent the amount of damages paid as a contingent consideration.

No definition available.

Name:	inwk_LossContingencyDamagesValueFixedConsideration
Namespace Prefix:	inwk_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

No definition available.

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

Transactions Involving Former Owner of Productions Graphics - Narrative (Details) € in Millions, $ in Millions	24 Months Ended
	Dec. 31, 2012 USD ($)	Dec. 31, 2012 EUR (€)	Dec. 31, 2015 USD ($)	Dec. 31, 2015 EUR (€)	Dec. 31, 2012 EUR (€)	Dec. 31, 2011 USD ($)	Dec. 31, 2011 EUR (€)
Loss Contingency [Abstract]
Fixed consideration			$ 8.0	€ 5.8
Contingent consideration			$ 9.4	€ 7.1
Maximum consideration	$ 7.8				€ 5.9	$ 1.6	€ 1.2
Fraudulent invoice amount	9.0	€ 6.9
Partial refund of consideration paid	$ 7.5	€ 5.7