Organization (Details)	12 Months Ended
Apr. 26, 2015 item
Organization
Number of casino gaming facilities	15isle_NumberOfCasinoGamingFacilities

Represents the number of facilities which are owned and/or 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