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Summary of Company Information (Details)
location in Thousands
Jun. 30, 2017
center
location
facility
Revenue from External Customer [Line Items]  
Number of customer locations | location 41
Number of distribution centers 31
Number of distribution facilities operating as a third party logistics provider | facility 2
United States  
Revenue from External Customer [Line Items]  
Number of distribution centers 26
Canada  
Revenue from External Customer [Line Items]  
Number of distribution centers 5