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Summary Of Significant Accounting Policies (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Nov. 24, 2018	Nov. 25, 2017	Nov. 24, 2018	Nov. 25, 2017
Summary Of Significant Accounting Policies [Line Items]
Revenue	$ 188,799	$ 156,738	$ 367,357	$ 297,924
Stock options vesting period			4 years
Reimbursements [Member]
Summary Of Significant Accounting Policies [Line Items]
Revenue	$ 3,200	$ 2,900	$ 6,500	$ 5,500
Conversion Fees [Member]
Summary Of Significant Accounting Policies [Line Items]
Revenue percentage	0.40%	0.40%	0.50%	0.40%
Permanent Placement Fees [Member]
Summary Of Significant Accounting Policies [Line Items]
Revenue percentage	0.60%	0.20%	0.60%	0.10%
Stock Incentive Plan 2014 [Member]
Summary Of Significant Accounting Policies [Line Items]
Stock options vesting period			4 years

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-Name Accounting Standards Codification
-Topic 606
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