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Acquisitions (Details)
3 Months Ended 6 Months Ended
Dec. 04, 2017
GBP (£)
Dec. 04, 2017
USD ($)
Jun. 19, 2017
USD ($)
Apr. 28, 2017
GBP (£)
Apr. 28, 2017
USD ($)
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Business Acquisition [Line Items]                  
Acquisition related costs           $ 215,000 $ 0 $ 329,000 $ 253,000
Cash paid, net of cash acquired               $ 13,064,000 $ 0
Clarks [Member]                  
Business Acquisition [Line Items]                  
Cash paid, net of cash acquired £ 9,698,000 $ 13,064,000              
Contingent consideration, high range | £ £ 1,500,000                
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%              
Better Bean [Member]                  
Business Acquisition [Line Items]                  
Cash paid, net of cash acquired     $ 3,434,000            
Contingent consideration, high range     $ 4,000,000            
Contingent consideration arrangements, period for achievement operating results     3 years            
Better Bean [Member] | Sales                  
Business Acquisition [Line Items]                  
Concentration risk, percentage, less than               1.00%  
Yorkshire Provender [Member]                  
Business Acquisition [Line Items]                  
Cash paid, net of cash acquired       £ 12,465,000 $ 16,110,000        
Contingent consideration, high range | £       £ 1,500,000          
Contingent consideration arrangements, period for achievement operating results       3 years 3 years        
Yorkshire Provender [Member] | Sales                  
Business Acquisition [Line Items]                  
Concentration risk, percentage, less than               1.00%