Note 7 - Closures and Impairments Expense - Future Liabilites Associated with Closed Properties (Details) $ in Thousands	9 Months Ended
Mar. 01, 2016 USD ($)
Balance	$ 7,051
Closing expense including rent and other lease charges	3,118
Payments	(5,252)
Other adjustments	830
Balance	$ 5,747

Amount of cash paid during the period to settle lease obligations associated with closed properties.

No definition available.

Name:	rt_PaymentsClosedPropertyLeaseObligation
Namespace Prefix:	rt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration