Restructuring Activities (Narrative) (Details) $ in Thousands	3 Months Ended	12 Months Ended
	May 30, 2020 USD ($) employee	May 29, 2021 USD ($)	May 30, 2020 USD ($)	May 25, 2019 USD ($)	May 26, 2018 USD ($)
Restructuring Cost and Reserve [Line Items]
Impairment of operating right-of-use assets			$ 649
Loss on disposal of assets			484	$ 126	$ 14
Restructuring Plan 2020 [Member]
Restructuring Cost and Reserve [Line Items]
Number of positions eliminated | employee	73
Termination costs	$ 3,900
Payment of restructuring costs	2,000
Expected restructuring costs	1,400		$ 1,400
Planned real estate reduction			26.00%
Lease Termination Costs [Member] | Restructuring Plan 2020 [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring costs	1,100
Impairment of operating right-of-use assets	600
Loss on disposal of assets	$ 500
Scenario, Forecast [Member] | Restructuring Plan 2020 [Member]
Restructuring Cost and Reserve [Line Items]
Payment of restructuring costs		$ 1,700