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Acquisitions (Details)
£ in Thousands, $ in Thousands
3 Months Ended
Dec. 01, 2017
GBP (£)
Dec. 01, 2017
USD ($)
Sep. 30, 2017
USD ($)
Business Acquisition [Line Items]      
Acquisition related costs | $     $ 114
Clarks [Member]      
Business Acquisition [Line Items]      
Cash paid, net of cash acquired £ 9,179 $ 12,368  
Contingent consideration, high range | £ £ 1,500    
Contingent consideration arrangements, period for achievement operating results 18 months 18 months  
Clarks [Member] | Sales      
Business Acquisition [Line Items]      
Concentration risk, percentage, less than 1.00% 1.00%