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Business (Details)
Sep. 30, 2017
numberoffacilities
Communications [Member]  
Business Transactions [Line Items]  
Number Of Locations 12
Residential [Member]  
Business Transactions [Line Items]  
Number Of Locations 36
Commercial & Industrial [Member]  
Business Transactions [Line Items]  
Number Of Locations 24
Infrastructure Solutions [Member]  
Business Transactions [Line Items]  
Number Of Locations 10