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Related Party Transactions	12 Months Ended
Related Party Transactions	Dec. 31, 2016
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions ValleyNet, an equity method investee of the Company, resells capacity on the Company’s fiber network under an operating lease agreement. Facility lease revenue from ValleyNet was approximately $2.4 million, $2.7 million and $3.0 million in the years ended December 31, 2016, 2015 and 2014, respectively. At both December 31, 2016 and 2015, the Company had accounts receivable from ValleyNet of approximately $0.2 million. The Company's PCS operating subsidiary leases capacity through ValleyNet. Payment for usage of these facilities was $3.0 million, $2.4 million and $2.3 million in the years ended December 31, 2016, 2015 and 2014, respectively.