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Related Party Transactions - Narrative (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2015
Sep. 30, 2016
Aug. 01, 2016
Dec. 31, 2015
Cincinnati Bell Inc.          
Related Party Transaction [Line Items]          
Ownership %     5.00%   9.50%
Operating partnership units owned (in shares)         0
Affiliated entity          
Related Party Transaction [Line Items]          
Revenue from related party $ 5.3 $ 16.5      
Expenses to related party $ 0.4 $ 1.2      
Affiliated entity | Common stock          
Related Party Transaction [Line Items]          
Cash dividend payable to stockholders (in dollars per share)       $ 0.38