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Financial Instruments Measured at Fair Value (Narrative) (Details)
3 Months Ended 12 Months Ended
Dec. 01, 2017
GBP (£)
Jun. 19, 2017
USD ($)
Apr. 28, 2017
GBP (£)
Sep. 15, 2016
GBP (£)
Feb. 20, 2015
CAD ($)
period
Jun. 30, 2017
CAD ($)
Jun. 30, 2016
CAD ($)
Jun. 30, 2018
USD ($)
Jun. 30, 2017
USD ($)
Dec. 21, 2015
GBP (£)
Business Acquisition [Line Items]                    
Contingent consideration paid               $ 0 $ 3,969,000  
Contingent consideration adjustment               (2,281,000) 526,000  
Discontinued foreign exchange hedges               0 0  
Cash Flow Hedges                    
Business Acquisition [Line Items]                    
Derivative, notional amount                 1,828,000  
Fair value amounts of foreign exchange derivative contracts, assets                 84,000  
Fair Value Hedges | Not Designated as Hedging Instrument                    
Business Acquisition [Line Items]                    
Derivative, notional amount               20,986,000 6,114,000  
Fair value amounts of foreign exchange derivative contracts, assets               $ 338,000    
Fair value amounts of foreign exchange derivative contracts, liabilities                 $ (38,000)  
Belvedere                    
Business Acquisition [Line Items]                    
Contingent consideration, high range         $ 4,000,000          
Contingent consideration arrangements, number of periods for achievement operating results | period         2          
Contingent consideration arrangements, period for achievement operating results         1 year          
Contingent consideration paid           $ 2,000,000 $ 2,000,000      
Orchard House                    
Business Acquisition [Line Items]                    
Contingent consideration paid | £       £ 1,500,000            
Business combination, contingent consideration | £                   £ 3,000,000
Better Bean                    
Business Acquisition [Line Items]                    
Contingent consideration, high range   $ 4,000,000                
Contingent consideration arrangements, period for achievement operating results   3 years             3 years  
Yorkshire Provender                    
Business Acquisition [Line Items]                    
Contingent consideration, high range | £     £ 1,500,000              
Contingent consideration arrangements, period for achievement operating results     3 years              
Clarks                    
Business Acquisition [Line Items]                    
Contingent consideration, high range | £ £ 1,500,000                  
Contingent consideration arrangements, period for achievement operating results 18 months