Summary of Company Information (Details) location in Thousands	Sep. 30, 2017 center location facility
Revenue from External Customer [Line Items]
Number of customer locations (over) | location	46
Number of distribution centers	32
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	27
Canada
Revenue from External Customer [Line Items]
Number of distribution centers	5