Note 7 - Closures and Impairments Expense, Including Trademark Impairments - Future Liabilites Associated with Closed Properties (Details) - USD ($) $ in Thousands	12 Months Ended
May 31, 2016	Jun. 02, 2015
Balance	$ 7,051	$ 10,873
Closed restaurant lease reserves	4,090	1,461
Payments	(5,737)	(4,807)
Other adjustments	866	(476)
Balance	$ 6,270	$ 7,051

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