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Acquisitions (Narrative) (Details)					3 Months Ended			6 Months Ended			12 Months Ended
	Mar. 28, 2018 EUR (€)	Dec. 04, 2017 USD ($) shares	Aug. 31, 2017 EUR (€)	Aug. 31, 2017 USD ($)	Nov. 24, 2018 EUR (€) shares	Nov. 24, 2018 USD ($)	Nov. 25, 2017 USD ($)	Nov. 24, 2018 EUR (€) shares	Nov. 24, 2018 USD ($)	Nov. 25, 2017 USD ($)	May 26, 2018 entity	Nov. 24, 2018 USD ($) shares
Business Acquisition [Line Items]
Number of businesses acquired | entity											2
Contingent consideration adjustment									$ (37,000)
Revenue						$ 188,799,000	$ 156,738,000		367,357,000	$ 297,924,000
Taskforce [Member]
Business Acquisition [Line Items]
Consideration paid			€ 5,800,000	$ 6,900,000
Discount rate												0.110
Contingent consideration adjustment					€ (114,000)	$ (130,000)		€ (30,000)	$ (33,000)
Taskforce [Member] | Contingent Consideration Due For Calendar Year 2017 [Member]
Business Acquisition [Line Items]
Contingent consideration, factor by which EBITDA is multiplied to calculate consideration payable					610.00%			610.00%				610.00%
Contingent consideration, percentage payable to employees of the acquired business					20.00%			20.00%				20.00%
Contingent consideration paid | €	€ 2,100,000
Taskforce [Member] | Contingent Consideration Due For Calendar Years 2018 And 2019 [Member]
Business Acquisition [Line Items]
Contingent consideration, factor by which EBITDA is multiplied to calculate consideration payable					610.00%			610.00%				610.00%
Contingent consideration, percentage payable to employees of the acquired business					15.00%			15.00%				15.00%
Contingent consideration liability					€ 3,900,000			€ 3,900,000				$ 4,400,000
Accretive [Member]
Business Acquisition [Line Items]
Contingent consideration liability												$ 100,000
Contingent consideration, shares | shares					108,000			108,000				108,000
Acquisition of business, cash paid		$ 20,000,000
Acquisition of business, shares issued | shares		1,072,000
Acquisition of business, shares issued, sale restriction period								4 years	4 years

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