Nature of Operations (Details)	9 Months Ended
Jan. 26, 2014 item
Nature of Operations
Number of casino gaming facilities	16

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