Note 7 - Closures and Impairments Expense - Future Liabilities Associated With Closed Properties (Details) $ in Thousands	3 Months Ended
Sep. 05, 2017 USD ($)
Balance	$ 16,230
Closing expense including rent and other lease charges	234
Payments	(2,045)
Adjustments to deferred escalating minimum rent and other	(12)
Balance	$ 14,407

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