Fair Value Measurements (Details Narrative) - USD ($) $ in Thousands	12 Months Ended
Sep. 30, 2017	Sep. 24, 2016	Sep. 26, 2015
Fair Value Measurements Details Narrative
Changes fair value of derivative instrument	$ 62	$ 291	$ (488)

It represents as a changes fair value of derivative instrument.

No definition available.

Name:	inse_ChangesFairValueOfDerivativeInstrument
Namespace Prefix:	inse_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration