Nature of Operations (Details)	6 Months Ended
Oct. 28, 2012 item
Nature of Operations
Number of casino gaming facilities	14

Represents the number of facilities which are owned and operated by the entity's wholly owned subsidiaries.

No definition available.

Name:	isle_NumberOfCasinoGamingFacilities
Namespace Prefix:	isle_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration